GOST 17166-71 Auxiliary Tooling for Metal-Cutting Machines. General Technical Requirements

GOST 17166-71

Group G27

INTERSTATE STANDARD

AUXILIARY TOOLING FOR METAL-CUTTING MACHINES

General technical requirements

Accessory tool for metal-cutting machines. General technical requirements

ICS 25.060.01

OKP 39 2800

Effective date: 1973-01-01

INFORMATIONAL DATA

1. DEVELOPED AND SUBMITTED BY the Ministry of Machine Tool and Tool-Making Industry of the USSR

2. APPROVED AND PUT INTO EFFECT by Resolution No. 1552 of the State Committee for Standards of the Council of Ministers of the USSR dated 08.09.71

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

5. EDITION with Amendments No. 2, 3, approved in November 1975 and December 1988 (IUS 11-75, 3-89)

This standard applies to auxiliary tooling for metal-cutting machines and establishes uniform technical norms and requirements.

This standard does not apply to general-purpose parts and does not regulate methods of inspecting auxiliary tooling.

(Amended version, Amendment No. 2).

1. GENERAL TECHNICAL REQUIREMENTS

1.1. Auxiliary tooling shall be manufactured in accordance with the requirements of this standard, standards establishing design and dimensions, and approved technical documentation.

1.2. The quality of castings shall comply with the requirements of:

gray iron castings — GOST 1412;

unalloyed structural steel castings — GOST 977;

alloyed structural steel castings — GOST 977.

1.3. The quality of forgings shall comply with the requirements of GOST 8479.

1.4. Thread hardness shall not exceed HRC₃ 40.

1.5. Chemical oxidizing per GOST 9.306 is used as the protective-decorative coating for non-mating machined surfaces of the tooling.

In technically justified cases, other types of coating or uncoated parts are permitted.

1.6. Non-machined surfaces of tooling made of cast iron or steel castings shall be coated with paint. The painted surface shall be semi-gloss, not lower than class II per GOST 9.032; when supplied with the machine, it shall match the color of the machine.

1.7. Limit deviations of dimensions:

a) diameter of the shank mating with the bore of the turret head or post — per h7;

b) diameter of the shank mating with the bores of multi-position posts not lying on the common axis of the machine, and width of the key for the machine slot — per h8;

c) width of the closed slot for the tool bit — per H12.

1.8. Unspecified limit deviations of dimensions:

for internal dimensions — to H14, for external dimensions — to h14, others — ±Shch^-.

1.9. Tolerances on tool tapers — per AT7 GOST 2848.

(Amended edition, Amendment No. 3).

1.10. Symmetry tolerance of the slot for securing the tool with a wedge relative to the shank taper — not more than 0.2 mm.

1.11. Surface roughness of the tooling per GOST 2789:

a) Morse tapers, metric tapers, tapers of 1 : 30, and shank mating with the turret head or post — Ra < 0.63 µm;

b) bearing surface of the slot for the tool bit and bearing surface of the holder mating with the tool post of the machine — Ra < 2.5 µm;

c) machined surfaces defining the external (commercial) appearance — Rz < 20 µm.

Note. The drawings given in the standard do not predetermine the design of the tooling.

1.12. The specified service life of the tooling is 1 year.

(Introduced additionally, Amendment No. 3).

2. TECHNICAL REQUIREMENTS FOR AUXILIARY TOOLING MOUNTED IN THE MACHINE SPINDLE

2.1. Sleeves

Table 1

Tool name	Indicator	Value
1. Solid adapter sleeves with external taper for tooling with a tapered shank	1.1. Hardness HRC:
	a) sleeves with internal Morse taper 1 and 2	36.5…41.5
	b) other sleeves	41.5…46.5
	1.2. Radial runout tolerance of the internal taper surface relative to the external taper of the sleeve	per Table 2
	1.3. Symmetry tolerance of the sides of the face slot relative to the axis of the sleeve, mm	0.05
	1.4. Roughness of tapered surfaces of the sleeve for jig boring machines:
	a) outer surface	0.16 µm
	b) inner surface	0.32 µm
2. Adapter sleeves for gear shaper cutters	2.1. Hardness HRC:	59…63
	2.2. Limit deviations:
	a) diameter of the bore for the ram, mm	+0.005
	b) diameter of the cylindrical surface for the gear shaper cutter, mm	-0.005
	2.3. Radial runout tolerance of the tapered bore surface or the external cylindrical surface for the gear shaper cutter relative to the bore surface for the ram, mm	0.003
	2.4. Axial runout tolerance of the surfaces adjacent to the ram and the gear shaper cutter relative to the bore for the ram, mm	0.003
	2.5. Convexity of end surfaces adjacent to the gear shaper cutter and ram	Not permitted
	2.6. Roughness of the cylindrical surface for the gear shaper cutter, the bore for the ram, and the end surfaces adjacent to the gear shaper cutter and ram	0.16 µm
3. Split sleeves with external taper for tooling with a cylindrical shank	3.1. Hardness HRC:
	sleeve	51.5…56.5
	tang	36.5…41.5
	3.2. Limit deviations:
	a) diameter of the bore for the tool	H8
	b) slot for the drive tang	H12
	c) slot for the square	H11
	3.3. Radial runout tolerance of the bore surface for the tool relative to the surface of the external taper	per Table 3 and Fig. 1
	3.4. Symmetry tolerance of the sides of the slot for the drive tang or square relative to the axis of the bore, mm	0.07
	3.5. Roughness of the bore surface for the tool	1.25 µm
4. Rigid quick-change adapter sleeves	4.1. Hardness, HRC:	57…61
	4.2. Limit deviations:
	a) outer surface diameter	F8
	b) tap bore diameter	H8
	c) dimension from the internal reference end face to the center of the spherical grooves, mm	±0.1
	4.3. Radial runout tolerance:
	a) outer surface relative to the internal conical surface, mm	0.02
	b) tap bore surface relative to the outer surface, mm	0.03
	c) spherical annular groove relative to the outer surface, mm	0.1
	4.4. Symmetry tolerance of the spherical grooves relative to the axis of the outer surface, mm	0.1
	4.5. The coaxiality tolerance of the square and cylindrical tap bores shall not exceed half the tolerance on the square
	4.6. Surface roughness:
	a) outer cylindrical surface	0.63 µm
	b) surface of the cylindrical tap bore	1.25 µm
5. Transition driver sleeves	5.1. Hardness, HRC	57…61
	5.2. Limit deviations:
	a) shank diameter	F8
	b) sleeve bore diameter	H7
	c) dimension from the sleeve reference end face to the center of the hole or slot for the pin, mm	±0.1
	5.3. Radial runout tolerance of the conical or cylindrical tool bore surface relative to the shank surface, mm	0.03
	5.4. Symmetry tolerance:
	a) end slot relative to the tool bore, mm	0.2
	b) pin hole relative to the shank surface, mm	0.1
	5.5. Parallelism tolerance of the slot faces driving the driver (pin), mm	0.03
	5.6. Surface roughness of the sleeve shank and the bore for the tool shank	1.25 µm

Table 2

Purpose of sleeves	Sleeve characteristics		Radial runout tolerance, mm
For jig boring machines	with thread for drawbar	for threaded tool shank	0.003
		for tool shank with tang	0.005
Universal	with external Morse taper and metric taper	short	0.010*
		long	0.015*
	with external 7:24 taper designated per GOST 15945	30, 35, 40, 45, 50, 55	0.015
		60, 65, 70, 75	0.020
For lathes (in the tailstock quill)	without tang		0.020

---

• At the customer’s request, short transition sleeves may be manufactured with a radial runout tolerance of 0.02 and 0.005 mm, and long transition sleeves with a radial runout tolerance of 0.03 mm.

Table 3

mm

Diameter of bores for tools with cylindrical shank		Mandrel diameter		Radial runout tolerance
with driver	with square
From 1.0 to 1.6	-	1.5	6	0.02
Over 1.6 to 3.0	-	2.0	10	0.03
Over 3.0 to 6.0	From 3.0 to 6.0	4.0	16
Over 6.0 to 10.0	Over 6.0 to 10.0	8.0	25
-	Over 10.0 to 18.0	12.0	40
-	Over 18.0 to 24.0	20.0	50	0.04
-	Over 24.0 to 30.0	25.0	60
-	Over 30.0 to 36.0	32.0	70	0.05

Note. The radial runout tolerance shall be checked in a test spindle against a test mandrel at a distance from the sleeve end face (see drawing).

Radial runout of the sleeve bore surface for the tool

Fig. 1

2.2. Chucks

Table 4

Tool name	Indicator	Value
1. Collets	1.1. Hardness HRC:
	a) over the length of the external taper	51.5…56.5
	b) over the remaining part of the collet	41.5…46.5
	1.2. Limit deviations	per Table 5
	1.3. Radial runout tolerance	” Table 5
	1.4. Surface roughness	” Table 5
2. Collet chucks	2.1. Hardness:
	a) body … HRC	53.5…57.5
	b) conical shank, HRC	46.5…51.5
	c) nut, HRC	36.5…41.5
	2.2. Limit deviations of the bore diameter in the body for the cylindrical surface of the collet in a chuck for a jig boring machine	H6
	2.3. Radial runout tolerance
	a) internal cylindrical and conical surfaces of the body relative to the conical surface of the shank of chucks for jig boring machines, mm	0.01
	b) internal conical surface of the body relative to the shank surface of chucks for milling machines, mm	0.02
	2.4. Surface roughness:
	a) external centering taper of the body of chucks for jig boring machines	0.16 µm
	b) cylindrical and conical bores for the collet in the body of chucks for jig boring machines	0.32 µm
	c) conical bore for the collet in the body of chucks for milling machines	0.63 µm
3. Chucks for quick-change tooling with driving balls or pin	3.1. Hardness HRC:
	a) body	46.5…51.5
	b) ring	46.5…51.5
	3.2. Limit deviations of the bore diameter for the bushing	H7
	3.3. Axial travel of the bushing in the chuck with the ring lowered, mm	1.00
	3.4. Radial runout tolerance of the bushing bore surface relative to the shank surface, mm	0.03
	3.5. Surface roughness of the body bore for the bushing	1.25 µm
4. Rocking and floating chucks	4.1. Hardness, HRC:
	a) body	57…61
	b) shank,	57…61
	conical part of the shank	41.5…46.5
	4.2. Limit deviations of the bore diameter in the body for the cylindrical surface of the collet	H7
	4.3. Angular displacement of the rocking chuck body relative to the shank axis, mm	0.05-0.20
	4.4. Coaxiality tolerance of the reamer bore and the conical shank of the floating chuck, mm	0.02
	4.5. Technical requirements for the collet	Item 1 of Table 4; 5
5. Quick-change jaw chucks for broaches	5.1. Hardness, HRC:
	a) body and bushing	41.5…46.5
	b) jaws	57…61
	5.2. Limit deviations:
	a) bore diameter in the body for the broach shank	H7
	b) diameter of the body’s outer surface for the machine slide	h7
	5.3. Radial runout tolerance
	a) bore for the broach shank relative to the outer surface of the body for the machine slide, mm	0.05
	b) bore for the broach shank (in a chuck without a guide surface of the body for the machine slide) relative to the mean thread diameter, mm	0.05
	5.4. Coaxiality tolerance of the threaded surface and the outer surface for the machine slide, mm	0.05
	5.5. Surface roughness of the body bore for the broach shank and of the outer surface for the machine slide	1.25 µm
6. Quick-change chucks for broaches for horizontal broaching machines	6.1. Hardness, HRC:
	a) body and bushing	41.5…46.5
	b) pin	51.5…56.5
	6.2. Limit deviations of the width of the cut-off section of the bushing	h8
	6.3. Surface roughness of the pin slot	2.5 µm
	6.4. Other technical requirements	Items 5.2; 5.3; 5.4; 5.5 of Table 4
7. Automatic chucks for broaches	7.1. Hardness, HRC:
	a) body and sleeve	41.5…46.5
	b) ring and jaws	57…61
	7.2. Radial runout tolerance
	a) bore in the chuck for the broach shank relative to the outer surface of the body for the machine slide	0.05
	b) bore in the chuck for the broach shank relative to the outer surface of the body for the sleeve	0.05
	c) bore in the chuck for the broach shank (without the guide section of the body for the machine slide) relative to the mean thread diameter	0.05
	7.3. Other technical requirements	Items 5.2; 5.4; 5.5
8. Chucks for keyway broaches	8.1. Hardness, HRC:	Table 4
	a) body	41.5…46.5
	b) jaws	57…61
	8.2. Limit deviations of the diameter of the body surface for the machine slide	h7
	8.3. Symmetry tolerance of the location of the bores for the jaw axes relative to the body axis, mm	0.05
	8.4. The axes of the jaw bores shall lie in one plane perpendicular to the body axis. Non-perpendicularity, mm	0.05
	8.5. Coaxiality tolerance of the threaded surface and the outer surface for the machine slide, mm	0.05
	8.6. Surface roughness of the outer surface of the body for the machine slide	1.25 µm
9. Adapters for broach chucks	9.1. Hardness, HRC	41.5…46.5
	9.2. Limit deviations:
	a) bore for the chuck shank	H7
	b) diameter of the outer surface of the adapter for the machine slide	h7
	9.3. Radial runout tolerance
	a) bore for the chuck shank relative to the mean diameter of the internal thread, mm	0.05
	b) outer surface for the machine slide relative to the mean diameter of the external thread, mm	0.05
	c) bore for the chuck shank relative to the outer surface for the machine slide, mm	0.05
	9.4. Surface roughness of the bore for the chuck shank and of the outer surface for the machine slide	1.25 µm
10. Three-jaw keyless drill chucks	10.1. Hardness, HRC not less than:
	a) body (nut)	57.5
	b) jaws	51.5
	10.2. Radial runout of the jaw surface relative to the mounting taper bore	As per Table 4a
11. Three-jaw keyed drill chucks	11.1. Hardness, HRC not less than:
	a) bushing or “key” bore	57.5
	b) jaws	51.5
	c) gear rim	51.5
	d) working surfaces of the chuck key	43.5
	11.2. Radial runout tolerance of the jaw surface relative to the mounting bore	As per Table 4a

The radial runout tolerance of the test mandrel clamped in the jaws, over the distance from 5 mm from the jaw face to the point where the mandrel’s radial runout tolerance is determined (Fig. 2), corresponds to the values given in Table 4a.

Note. If the jaw faces do not protrude from the chuck body when the test mandrel is clamped, the 5 mm distance is measured from the chuck face.

Fig. 2

Table 4a

mm

Sizes		designation	Radial runout tolerance of chucks
			without wrench		with wrench
			Product grade
			I	II
4	2	25	0.05	0.15	0.15
	4	40
6	3	35	0.06	0.15	0.15
	6	55
10	6	55	0.06	0.20	0.20
	10	85
13	6	55	0.08	0.20	0.20
	13	105
16	10	85	0.10	0.20	0.20
	16	130
20	10	85	-	-	0.25
	20	160

Notes:

1. The test mandrel is clamped along the entire length of the jaws, but does not contact the end face of the drill chuck.

2. Permissible deviations of the test mandrel (straightness and taper) shall not exceed 0.01 mm over a length of 100 mm.

Table 5

Limit deviations, radial runout and surface roughness of the collet

Tool name	Limit deviation		Radial runout tolerance of the tool bore relative to the outer surface		Surface roughness
	of the tool bore	of the outer mounting cylinder	of the taper	of the mounting cylinder	of the tool bore	outer
			max			of the taper	of the mounting cylinder
	mm				no coarser than
Collets for chucks of jig boring machines	H7	F7	0.005	0.005	0.63 µm	0.32 µm	0.32 µm
Collets for chucks of milling machines	H8	-	0.015	-	1.25 µm	0.63 µm	-
Collets for chucks of drilling machines, turret lathes and turret automatic lathes	H8	F8	0.020	0.020	1.25 µm	0.63 µm	0.63 µm

(Revised edition, Amendment No. 3).

2.3. Mandrels

Table 6

Tool name	Indicator	Value
1. Short milling mandrels with longitudinal or face key and with conical shanks (Morse, metric and 7:24)	1.1. Hardness HRC:
	a) of the mandrel	51.5…61
	of the conical part of the mandrel	53.5…57.5
	b) of the driver	41.5…46.5
	1.2. Limit deviations:
	a) of the mandrel diameter for the cutter	h7
	b) of the mandrel diameter for the cutter with a face key and fastening bolts	h6
	c) of the driver bore for the mandrel of jig boring machines	H7
	d) of the driver bore for the mandrel of milling and boring machines	H8
	1.3. Fit of the driver slot with the mandrel lug	H11/h11l
	1.4. Radial runout tolerance of the outer surface of the mandrel for the cutter relative to the conical surface of the shank:
	a) for mandrels with a face or longitudinal key, mm	0.01
	b) for mandrels with a face key and fastening bolts, mm	0.015
	1.5. Face runout tolerance of the surface mating with the cutter or driver relative to the conical shank:
	a) for mandrels of jig boring machines, mm	0.005
	b) for mandrels with a face or longitudinal key of milling and boring machines, mm	0.005
	c) for mandrels with a face key and fastening bolts, mm	0.01
	Convexity of the bearing surfaces	Not permitted
	1.6. Symmetry tolerance
	a) of the mandrel lug for the driver slot relative to the outer surface of the mandrel for the cutter, mm	0.1
	b) of the slot for the face key of the mandrel with fastening bolts relative to the outer surface for the cutter, mm
	for tapers 30, 40, 45	0.03
	for tapers 50, 55, 60	0.04
	for tapers 65, 70	0.05
	c) of the driver slots of mandrels with 7:24 taper relative to the shank surface, mm
	for tapers 30, 40, 45	0.06
	for tapers 50, 55, 60	0.10
	for tapers 65, 70	0.15
	d) of the driver slot mating with the mandrel, and of the lug mating with the tool, relative to the bore, mm	0.10
	1.7. Parallelism tolerance of the bearing end faces:
	a) for drivers of mandrels of jig boring machines, mm	0.005
	b) for drivers of mandrels of milling and boring machines, mm	0.01
	1.8. Perpendicularity tolerance of the driver end face adjoining the mandrel end face relative to the bore:
	a) for drivers of mandrels of jig boring machines, mm	0.005
	b) for drivers of mandrels of milling and boring machines, mm	0.015
	1.9. Roughness:
	a) of the conical shank surface of mandrels for jig boring machines	0.16 µm
	b) of the outer surface of the mandrel for the cutter, of the bearing end face surfaces of the mandrel and driver	0.63 µm
	c) of the driver bore surface	1.25 µm
2. Long milling mandrels with a trunnion or supporting bushing and conical shanks of Morse and 7:24 tapers	2.1. Hardness HRC:
	a) of the mandrel,	55.5…61
	of the conical part of the mandrel	53.5…57.5
	b) of the supporting bushing	59…63
	2.2. Limit deviations:
	a) of the outer surface diameter of the mandrel for the cutter	h7
	b) of the outer surface diameter of the trunnion	F8
	c) of the bore diameter of the supporting bushing	H7
	d) of the outer surface diameter of the supporting bushing	F8
	2.3. Tolerances for the external thread of the mandrel	6g
	2.4. Radial runout tolerance:
	a) of the mandrel relative to the axis of the center holes, checked at the middle of the surface for the cutter, with the length of its cylindrical part, mm
	up to 315 mm	0.015
	” 400 mm	0.020
	” 500 mm	0.025
	” 630 mm	0.030
	” 800 mm	0.035
	” 1000 mm	0.040
	b) of the conical surface of the mandrel relative to the axis of the center holes, checked at a distance of 8 mm from the basic plane of the taper, mm	0.012
	c) of the trunnion surface relative to the axis of the center holes, checked at the middle of its length, mm	0.010
	2.5. Radial runout tolerance of the outer surface of the supporting bushing relative to the bore surface, for the outer diameter of the bushing, mm:
	a) from 38 to 55 mm	0.008
	b) over 55 to 71 mm	0.010
	c) over 71 to 140 mm	0.012
	2.6. Face runout tolerance of the bearing surface of the mandrel relative to the axis of the center holes, mm	0.010
	Convexity of the bearing surface	Not permitted
	2.7. Face runout tolerance of the supporting bushing relative to the bore surface, and non-parallelism of the end faces over a length equal to the outer diameter, for the outer diameter of the bushing, mm:
	a) from 38 to 55 mm	0.004
	b) over 55 to 71 mm	0.005
	c) over 71 to 140 mm	0.006
	Convexity of the bearing surfaces	Not permitted
	2.8. Symmetry tolerance of the mandrel slot for the longitudinal key relative to the outer surface for the cutter, mm	0.2
	2.9. Parallelism tolerance of the key slot relative to the outer surface for the cutter shall not exceed, over a length, mm
	a) 100 mm	0.05
	b) 300 mm	0.10
	2.10. Surface roughness of the outer surfaces of the arbor for the cutter and the journal, the outer surface and bore surface of the support sleeve, and the surfaces of the support end faces of the arbor and sleeve	0.63 µm
3. Arbors for cutters for gear-milling machines	3.1. Hardness HRC:
	a) of the mandrel	55.5…61
	of the conical part of the mandrel	53.5…57
	b) the support sleeve	59…63
	c) the washer	45.5…51.5
	3.2. Limit deviations:
	a) of the outer surface diameter of the mandrel for the cutter	h6
	b) bore diameter of the support sleeve	H6
	c) outer diameter of the support sleeve	h6
	d) bore diameter of the washer	D9
	3.3. Tolerances for the external thread of the arbor	6g
	3.4. Tolerance for the radial runout of the outer surface of the arbor for the cutter relative to the surfaces of the taper shank and the support sleeve seat:
	a) for arbors of normal accuracy, mm	0.010
	b) for arbors of increased accuracy, mm	0.005
	3.5. Tolerance for the radial runout of the outer surface of the support sleeve relative to the bore surface, for a bore diameter of, mm:
	a) from 12 to 27 mm	0.005
	b) over 27 to 50 mm	0.006
	c) over 50 to 100 mm	0.008
	3.6. Tolerance for the face runout of the support surface of the arbor relative to the taper surface of the shank, mm:
	a) for arbors of normal accuracy	0.005
	b) for arbors of increased accuracy	0.003
	Convexity of the bearing surfaces	Not permitted
	3.7. Tolerance for the face runout of the support sleeve relative to the bore surface and the non-parallelism of the end faces over a length equal to the outer diameter, for a bore diameter of, mm
	a) from 12 to 27 mm	0.003
	b) over 27 to 50 mm	0.004
	c) over 50 to 100 mm	0.005
	Convexity of the bearing surfaces	Not permitted
	3.8. Tolerance for the symmetry of the arbor’s longitudinal keyway slot relative to the outer surface for the cutter, mm	0.1
	3.9. Tolerance for the parallelism of a) the arbor’s longitudinal keyway slot relative to the outer surface for the cutter, mm:
	over a length of 100 mm	0.03
	over a length of 300 mm	0.05
	b) the end faces of the washer, mm 3.10. Surface roughness:	0.005
	a) the outer surfaces of the arbor for the cutter and the support sleeve, the support end-face surfaces of the arbor and sleeve, and the outer surface and bore surface of the sleeve	0.32 µm
	b) the bore surface and end faces of the washer	0.63 µm
4. Spacer rings for cutter arbors	4.1. Material for rings 0.05 to 1 mm thick: heat-treated spring steel strip, first-strength grade (1P), increased thickness accuracy (V), cold-rolled with trimmed edges, bright (bright-hardened, work-hardened) per GOST 2614, made of steel grades U7A, U8A, U9A, U10A and U12A - per GOST 1435
	Surface roughness	0.63 µm
	4.2. Hardness of rings over 1 mm thick	55.5…61
	4.3. Limit deviations:
	a) bore diameter of the ring	D11
	b) thickness of rings over 1 mm	F9
	4.4. Tolerance for the parallelism of the ring end faces, for a bore diameter of, mm
	a) 13 mm	0.003
	b) over 13 to 40 mm	0.004
	c) over 40 to 80 mm	0.005
	d) over 80 to 100 mm	0.006
	4.5. Surface roughness of the end faces of rings over 1 mm thick	0.63 µm
5. Arbors for shell-type counterbores and reamers	5.1. Hardness, HRC:
	a) of the mandrel	51.5…56.5
	conical part of the shank	41.5…46.5
	b) of the driver	36.5…41.5
	5.2. Fit between the bore of the driver and the arbor	H7/h7
	5.3. Tolerance for the radial runout of the 1:30 taper surface of the arbor relative to the taper surface of the shank, for a diameter of the 1:30 taper surface of, mm:
	a) from 13 to 22 mm	0.010
	b) over 22 mm	0.015
	5.4. Surface roughness of the seating surface of the arbor for the driver and the bore surface of the driver	1.25 µm
6. Floating arbors for shell-type reamers	6.1. Hardness, HRC:
	a) of the mandrel	51.5…56.5
	b) the taper part of the shank	41.5…46.5
	c) the driver	36.5…41.5
	6.2. Angular displacement of the arbor relative to the axis of the shank, mm	0.05-0.20
	6.3. Tolerance for the coaxiality of the 1:30 taper surfaces and the shank, mm	0.02
7. Arbors for countersinks for reverse facing	7.1. Hardness HRC of the part for the countersink;	57…61
	the remaining part	41.5…46.5
	7.2. Limit deviations:
	a) diameter of the outer surface for the countersink	F8
	b) diameter of the guide surface	F9
	7.3. Tolerance for the radial runout of the outer guide surface of the arbor and the surface for the countersink relative to the taper surface of the shank, for an arbor diameter of, mm:
	a) 8 mm	0.02
	b) over 8 to 13 mm	0.03
	c) over 13 to 22 mm	0.04
	d) over 22 to 50 mm	0.05
	7.4. Tolerance for the symmetry of the tang flats relative to the outer surface of the arbor for the countersink, mm	0.05
	7.5. Surface roughness:
	a) the outer surface for the countersink	0.63 µm
	b) the outer guide surface	1.25 µm
8. Arbors for shell-type countersinks with interchangeable guide pins	8.1. Hardness, HRC:
	a) of the mandrel	41.5…46.5
	b) the guide pin	56.5… 61
	8.2. Limit deviations:
	a) the surface of the guide pin for the countersink	h7
	b) the guide surface of the guide pin	D9
	8.3. Tolerance for the radial runout of the surface of the guide pin for the countersink relative to the taper surface of the arbor shank, mm	0.03
	8.4. Tolerance for the face runout of the support surface of the arbor relative to the surface of the guide pin for the countersink, mm	0.02
	8.5. Surface roughness of the guide surface of the guide pin and the surface of the guide pin for the countersink	1.25
9. Cantilever boring bars	9.1. Hardness, HRC	41.5…46.5
	9.2. The length of the cantilever boring bar (up to the taper shank) must not exceed:
	a) five of its diameters for jig boring machines
	b) ten of its diameters for boring machines
	9.3. Slots for the boring tools shall be made at an angle of 90° to the axis of the boring bar for boring through holes, or at an angle of 60° and 45° for boring blind holes
10. Boring bars for insert tools	10.1. Hardness HRC:
	boring bars	51.5…56.5
	tapered part of the shank. Windows, threads and holes shall be protected from heat treatment	41.5…46.5
	10.2. Limit deviations:
	a) diameter of the outer guide surface	F8
	b) length of the slot for floating reamers, boring and facing inserts	H7
	c) length of the slot for boring and facing inserts (eccentric clamping)	H8
	d) length of the slot for boring and facing inserts (clamping with a tapered screw)	H12
	e) slot width	H8
	f) diameter of the cylindrical hole for the tapered screw	H7
	10.3. Radial runout tolerance of the outer surface of a cantilever boring bar for insert tools relative to the tapered surface, for boring bar diameter, mm:
	from 25 to 50 mm	0.015
	over 50 to 100 mm	0.020
	over 100 to 180 mm	0.030
	10.4. Radial runout tolerance of the outer surface of a double-supported boring bar relative to the centers, for boring bar length, mm
	up to 2000 mm	0.015
	over 2000 mm	0.020
	10.5. Parallelism tolerance of the slot side surfaces along the longitudinal axis of the boring bar over a length of 100 mm, mm	0.03
	10.6. Perpendicularity tolerance:
	a) of the slot support plane relative to the boring bar axis over a length of 100 mm, mm	0.03
	b) of the axis of the hole for the tapered screw relative to the boring bar axis over a length of 100 mm, mm	0.05
	10.7. Coaxiality tolerance of the plain hole for the tapered screw relative to the pitch diameter of the thread, mm	0.03
	10.8. Symmetry tolerance of the slot and the screw hole relative to the boring bar axis, mm	0.03
	10.9. Surface roughness:
	a) of the outer centering surface of the boring bar and the surface of the hole for the tapered screw	0.63 µm
	b) of the slot surface	1.25 µm

(Revised edition, Amendment No. 3).

3. TECHNICAL REQUIREMENTS FOR AUXILIARY TOOLS MOUNTED ON THE TOOL CARRIAGE

3.1. Tool holders

Table 7

Tool name	Indicator	Value
1. Holders for guide rails for tool holders for round tool bits and replaceable inserts on the front and rear carriages of turret lathes	1.1. Hardness HRC:
	a) body	36.5…41.5
	b) rails	57…61
	1.2. Surface roughness of the working surface of the rail	1.25 µm
2. Inserts for shank-type and insert-type tool bits for tool holders on the front and rear carriages of turret lathes	2.1. Body hardness HRC	36.5…41.5
	2.2. Limit deviations of the body shank diameter	D11
	2.3. Surface roughness of the shank and the body support plane	2.5 µm
3. Inserts for knurling rollers for tool holders on the front and rear carriages of turret lathes	3.1. Hardness HRC:
	a) body	36.5…41.5
	b) axle for the roller	57…61
	3.2. Limit deviations:
	a) body shank diameter	D11
	b) axle diameter for the roller	h8
	c) slot for the roller. 3.3. Surface roughness of:	H11
	a) axle for the roller	0.63 µm
	b) shank and body support plane	2.5 µm
4. Tool holders for knurling for lathes	4.1. Hardness, HRC:
	a) body and roller holder	36.5…41.5
	b) axle for the roller	57…61
	4.2. Limit deviations:
	a) axle diameter for the roller	h8
	b) slot for the roller	H11
	4.3. Surface roughness of the working surface of the axle for the roller	0.63 µm
5. Tool holders for shank-type and insert-type tool bits for lathes	5.1. Body hardness HRC	36.5…41.5
	5.2. Surface roughness of the dovetail-type slot surfaces	2.5 µm
6. Multi-tool holders with a tapered shank for a key or driver and with a cylindrical shank for a driver, for vertical turret lathes	6.1. Hardness, HRC:
	a) body	36.5…41.5
	b) pin	57…61
	6.2. Limit deviations:
	a) shank diameter	h7
	b) keyway slot	H8
	c) driver dimension. 6.3. Symmetry tolerance:	h11
	a) of the keyway slot relative to the tapered surface of the shank, mm	0.02
	b) of the driver relative to the tapered surface of the shank, mm	0.05
	6.4. Parallelism tolerance of the common reference plane of the working surfaces of the pins relative to the shank axis, mm	0.2
	6.5. Surface roughness of the driver and the keyway slot	2.5 µm
7. Boring tool holders with a tapered shank for vertical turret lathes	7.1. Body hardness HRC	36.5…41.5
8. Tool holders for insert-type tool bits for multi-spindle automatic lathes	8.1. Hardness of the body and tool bit holder HRC	36.5…41.5
	8.2. Deviation of the body support plane surfaces mating with the carriage from the common reference plane, mm	0.03
	8.3. Surface roughness of the body support plane surfaces mating with the carriage	1.25 µm
9. Tool holders for shank-type tool bits for multi-spindle automatic lathes and multi-tool semi-automatic lathes	9.1. Hardness of the body, base and wedge HRC	36.5…41.5
	9.2. Deviation of the base support plane surfaces mating with the carriage from the common reference plane, mm	0.03
	9.3. Surface roughness of the base support plane surfaces mating with the carriage	1.25 µm
10. Tool holders for prismatic tool bits for multi-spindle automatic lathes	10.1. Hardness of the body, clamp and base HRC	36.5…41.5
	10.2. Surface roughness of the base support plane surface mating with the carriage	1.25 µm
11. Steady-rest tool holders for shank-type tool bits for multi-spindle automatic lathes	11.1. Hardness HRC:
	a) body of the tool bit holder and roller holder	36.5…41.5
	b) axle for the roller	57…61
	c) roller	59…63
	11.2. Radial runout tolerance of the outer surface of the roller relative to its axis, mm	0.01
	11.3. Deviation of the body support plane surfaces mating with the carriage from the common reference plane, mm	0.03
	11.4. Surface roughness of the working surface of the roller and the body support plane surfaces mating with the carriage	1.25 µm
12. Holders for round cutters	12.1. Hardness, HRC:
	a) body and base	36.5…41.5
	b) axle for the cutter and ring	41.5…46.5
	c) regulator	51.5…56.5
	12.2. Limit deviations of the axle diameter for the cutter	h7
	12.3. Perpendicularity tolerance of the ring’s bearing end face mating with the cutter, relative to the holder’s bearing plane adjacent to the tool rest, mm 12.4. Surface roughness:	0.01
	a) working surface of the axle	0.63 µm
	b) surfaces of the base’s bearing planes mating with the tool rest, and the bearing plane of the ring	1.25 µm
13. Holders for replaceable inserts for automatic turret lathes	13.1. Body hardness, HRC	36.5…41.5
	13.2. Perpendicularity tolerance of the slot for the insert shank relative to the side plane of the body, mm	0.03
	13.3. Surface roughness:
	a) bearing plane of the body mating with the tool rest	1.25 µm
	b) slot for the insert shank	2.5 µm

4. TECHNICAL REQUIREMENTS FOR AUXILIARY TOOLS MOUNTED IN A TURRET HEAD OR POST

4.1. Steady rests

Table 8

Tool name	Indicator	Value
1. Prismatic steady rests for holders of automatic turret lathes	1.1. Hardness HRC:
	a) body	36.5…41.5
	b) prism	59…63
	1.2. Limit deviations of the body shank diameter	h8
	1.3. Parallelism tolerance of the bearing plane of the prism slot relative to the body axis, mm	0.02
	1.4. Perpendicularity tolerance of the body’s bearing plane relative to its shank, mm 1.5. Surface roughness:	0.01
	a) working surface of the prism	1.25 µm
	b) surfaces of the shank, the body’s bearing plane, and the bearing plane of the prism slot	2.5 µm

4.2. Bushings

Table 9

Tool name	Indicator	Value
1. Adapter bushings with internal Morse taper for vertical lathes and turret lathes	1.1. Bushing hardness, HRC:	41.5…46.5
	1.2. Limit deviations of the distance between flats	h11
	1.3. Radial runout tolerance of the internal conical surface relative to the outer surface mating with the turret head:
	a) for short bushings, mm	0.02
	b) for long bushings, mm	0.03
	1.4. Symmetry tolerance:
	a) flat planes relative to the outer surface mating with the turret head, mm	0.05
	b) drive pin slot relative to the outer surface mating with the turret head, mm	0.1
	1.5. Surface roughness of the flats	2.5 µm
2. Clamping bushings for tools with cylindrical shanks for holders and turret heads	2.1. Body hardness HRC	46.5…51.5
	2.2. Limit deviations:
	a) outer surface diameter	h7
	b) bore diameter:
	solid bushings	H7
	split bushings	H8
	2.3. Radial runout tolerance of the concentric bore surface relative to the outer surface, mm	0.02
	2.4. Surface roughness:
	a) outer	0.63 µm
	b) bore	1.25 µm

4.3. Chucks

Table 10

Tool name	Indicator	Value
1. Drilling collet chucks for automatic turret lathes	1.1. Hardness HRC:
	a) body and gear	41.5…46.5
	b) spindle	51.5…56.5
	1.2. Limit deviations of the diameter of the bore in the spindle for the collet	H7
	1.3. Radial runout tolerance of the internal conical surface and the spindle bore surface for the collet, relative to the outer surface of the body mating with the turret head, mm	0.04
	1.4. Surface roughness of the cylindrical and conical bores for the collet	1.25 µm
	1.5. Technical requirements for the collet	Item 1 of Table 4; 5
2. Drilling collet chucks for automatic multi-spindle lathes and turret lathes	2.1. Body hardness	51.5…56.5
	2.2. Limit deviations of the diameter of the body bore for the collet	H7
	2.3. Radial runout tolerance of the internal conical surface and the body bore surface for the collet, relative to the body shank surface, mm	0.02
	2.4. Surface roughness of the cylindrical and conical bores for the collet	1.25 µm
	2.5. Technical requirements for the collet	Item 1 of Table 4; 5
3. Tilting chucks for reamers for automatic turret lathes	3.1. Hardness of the body and shank	41.5…46.5
	3.2. Limit deviations of the diameter of the body bore for the clamping bushing	H7
	3.3. Angular displacement of the body relative to the shank axis, within, mm	0.05-0.20
	3.4. Surface roughness of the body bore for the clamping bushing	1.25 µm
4. Floating chucks for reamers for turret lathes and automatic turret lathes	4.1. Hardness of the body and shank	57…61
	4.2. Limit deviations of the diameter of the body bore for the reamer shank	H7
	4.3. Coaxiality tolerance of the bore for the reamer shank and the chuck shank, mm	0.02
	4.4. Surface roughness of the bore for the reamer shank	1.25 µm
5. Mounted collet chucks or chucks with clamping bushings for turret lathes and automatic turret lathes	5.1. Hardness of the body and shank	41.5…46.5
	5.2. Limit deviations of the diameter of the body bore for the collet or clamping bushing	H7
	5.3. Radial runout tolerance of the conical surface and the body bore surface for the collet or clamping bushing, relative to the shank surface, mm	0.02
	5.4. Surface roughness of the cylindrical and conical bores for the collet and the bore for the clamping bushing	1.25 µm
	5.5. Technical requirements for the collet	Item 1 of Table 4; 5
6. Chucks with clamping bushings for tools with cylindrical shanks for turret lathes and automatic turret lathes	6.1. Body hardness, HRC	41.5…46.5
	6.2. Limit deviations of the diameter of the body bore for the clamping bushing	H7
	6.3. Radial runout tolerance of the bore surface for the bushing relative to the outer surface of the body shank, mm	0.02
	6.4. Surface roughness of the bore for the bushing	1.25 µm
7. Driving chucks for pivoting mandrels for turret lathes	7.1. Hardness, HRC:
	a) body	41.5…46.5
	b) mandrels	51.5…56.5
	7.2. Limit deviations of the hole diameter for the clamping sleeve in mandrels for reamers with cylindrical shank	H7
	7.3. Angular displacement of mandrels relative to the body axis, within, mm	0.05-0.20
	7.4. Symmetry tolerance of the bearing planes of the body slot for the mandrel driver relative to the body axis, mm	0.2
	7.5. Surface roughness of the hole for the clamping sleeve	1.25 µm
8. Chucks for taps for turret lathes	8.1. Hardness of the body, sleeve and shank	36.5…41.5
	8.2. Limit deviations of the sleeve hole diameter for the tap	H8
	8.3. Radial runout tolerance of the sleeve hole surface for the tap relative to the shank surface, mm	0.05
	8.4. The coaxiality tolerance of the square and cylindrical holes of the sleeve for the tap shall not exceed the manufacturing tolerance of the square
	8.5. Surface roughness of the sleeve hole for the tap	1.25 µm
9. Retractable chucks for taps for automatic turret lathes	9.1. Hardness of the body and shank	36.5…41.5
	9.2. Limit deviations of the hole diameter in the body for the clamping sleeve	H7
	9.3. Radial runout tolerance of the body hole surface for the clamping sleeve relative to the shank surface, mm	0.04
	9.4. Surface roughness of the hole for the clamping sleeve	1.25 µm
10. Chucks for dies for turret lathes	10.1. Hardness of the sleeve and body, HRC	36.5…41.5
	10.2. Limit deviations of the sleeve hole diameter for the die	H8
	10.3. Radial runout tolerance of the hole surface for the die relative to the shank surface, mm	0.05
	10.4. Surface roughness of the hole for the die	1.25 µm
11. Retractable chucks for dies for automatic turret lathes	11.1. Hardness of the sleeve, body and shank	36.5…41.5
	11.2. Limit deviations of the sleeve hole diameter for the die	H8
	11.3. Radial runout tolerance of the hole surface for the die relative to the shank surface, mm	0.04
	11.4. Surface roughness of the hole for the die	1.25 µm

4.3. Tool holders

Table 11

Tool name	Indicator	Value
1. Tool holders for knurling for turret lathes	1.1. Bushing hardness, HRC:
	a) body and roller holder	36.5…41.5
	b) axle for roller 1.2. Limit deviations:	57…61
	a) axle diameter for the roller	h8
	b) width of the slot for the roller	H11
	1.3. Surface roughness of the working surface of the axle for the roller	0.63 µm
2. Tool holders for bar-type and cut-off blade-type tools for turret lathes	2.1. Body hardness HRC	36.5…41.5
	2.2. Surface roughness of the dovetail-type slot surfaces	2.5 µm
3. Steady-rest-type tool holders for bar-type tools for turret lathes	3.1. Hardness HRC:
	a) body and roller holder	36.5…41.5
	b) axle for the roller	57…61
	c) roller	59…63
	3.2. Radial runout tolerance of the roller’s outer surface relative to its axis, mm	0.01
	3.3. Surface roughness of the roller’s working surface	1.25 µm
4. Tool holders for bar-type tools and drills for turret lathes and automatic turret lathes	4.1. Hardness of the body, HRC	36.5…41.5
	4.2. Limit deviations of the hole diameter for the clamping sleeve	H7
	4.3. Radial runout tolerance of the hole surface for the clamping sleeve relative to the shank surface, mm	0.02
	4.4. Surface roughness of the hole for the clamping sleeve	1.25 µm
5. Combination tool holders for tools and drills for automatic turret lathes	5.1. Hardness of the body and insert holder, HRC	36.5…41.5
	5.2. Limit deviations of the hole diameter for the clamping sleeve	H7
	5.3. Radial runout tolerance of the hole surface for the clamping sleeve relative to the shank surface, mm	0.02
	5.4. Surface roughness of the hole for the clamping sleeve	1.25 µm
6. Mountable tool holders for tools and drills for automatic turret lathes	6.1. Technical requirements for the tool holder	Item 5, Table 10
7. Pivoting copying tool holders for turning with tangential tool setting for automatic turret lathes	7.1. Hardness of the body and tool post, HRC	36.5…41.5
	7.2. Limit deviations of the hole diameter for the clamping sleeve	H7
	7.3. Radial runout tolerance of the hole surface for the clamping sleeve relative to the shank surface, mm	0.02
	7.4. Surface roughness of the hole for the clamping sleeve	1.25 µm
8. Pivoting copying boring tool holders for automatic turret lathes	8.1. Hardness of the body and tool bit holder HRC	36.5…41.5
	8.2. Limit deviations of the hole diameter for the clamping sleeve	H7
	8.3. Surface roughness of the hole for the clamping sleeve	1.25 µm
9. Single-tool holders with guide bushings for automatic turret lathes	9.1. Hardness of the body, HRC	36.5…41.5
	9.2. Limit deviations of the hole diameters for the guide bushings	H7
	9.3. Radial runout tolerance of the hole surfaces for the guide bushings relative to the shank surface, mm	0.02
	9.4. Surface roughness of the hole surfaces for the guide bushings	1.25 µm
10. Multi-tool holders for a driving pin or with a driver for vertical turret lathes	10.1. Hardness HRC:
	a) body	36.5…41.5
	b) pin	57…61
	10.2. Limit deviations of the driver dimension	h11
	10.3. Parallelism tolerance of the common contact plane of the pins’ working surfaces relative to the shank axis, mm	0.20
	10.4. Symmetry tolerance:
	a) of the slot for the driving pin relative to the shank, mm	0.10
	b) of the driver planes relative to the shank, mm	0.05
	10.5. Surface roughness of the driver	2.5 µm
11. Boring tool holders for a driving pin or with flats for vertical turret lathes	11.1. Hardness of the body, HRC	36.5…41.5
	11.2. Limit deviations of the distance between flats	h11
	11.3. Symmetry tolerance:
	a) of the slot for the driving pin relative to the shank, mm	0.10
	b) of the flat planes relative to the shank, mm	0.05
	11.4. Surface roughness of the flats	2.5 µm
12. Tool holders for round tools for turret lathes	12.1. Hardness, HRC:
	a) body and ring	36.5…41.5
	b) regulator	51.5…56.5
	c) axes	41.5…46.5
	12.2. Limit deviations of the axle diameter for the cutter	h7
	12.3. Perpendicularity tolerance of the support face of the ring mating with the tool, relative to the body surface mating with the turret, mm	0.01
	12.4. Surface roughness:
	a) working surface of the axle	0.63 µm
	b) surfaces of the support plane of the ring	1.25 µm

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking shall be applied in accordance with the requirements of the standards for the relevant auxiliary tools.

Marking characters shall be even, clear, and shall not impair the surface quality.

5.2. The tool shall undergo corrosion protection (preservation) in accordance with GOST 9.014.

5.3. The tool shall be wrapped in wrapping paper (GOST 8273) or bag paper (GOST 2228).

Tools of the same type shall be packed in bundles containing an equal quantity of tools.

A label shall be affixed to the surface of the bundle, containing:

a) the name of the tool;

b) the standard designation;

c) the main parameters of the tool;

d) the quantity of tools in the bundle;

e) the packaging date;

f) the trademark of the manufacturing enterprise;

g) the quality control department (QCD) stamp.

5.4. Wooden boxes of types I, II, III per GOST 2991 shall be used for transporting the tool.

Tools weighing more than 200 kg shall be packed in wooden boxes of type I per GOST 2991.

5.5. The inner walls of the boxes shall be lined with moisture-proof paper per GOST 8828.

For long-term storage of the tool or transportation to the Far North regions, coastal and southern regions of the country, the inner walls of the boxes shall additionally be lined with polyethylene film per GOST 10354, with the seams sealed with adhesive polyethylene tape. The thickness of the polyethylene film shall be not less than 150 μm.

5.6. The packaged tool shall be placed tightly in the boxes, without gaps, to prevent movement inside the box.

5.7. A packing list stating the names and quantities of the packaged tools shall be included in each box.