T-shaped cotter pin
T-shaped cotter pin to DIN 94: design, materials, sizes, application in toy assembly. FLOK supplies fasteners, including manufacturing to custom sizes.
The name of this type of cotter pin speaks for itself about its configuration. The product is a double flexible metal rod with a T-shaped head, made of wire with a semicircular cross-section.
The working ends of the fastener have different lengths for ease of installation.
The technical specifications of the T-shaped cotter pin are governed by the German standard DIN 94. Various types of low- and high-carbon steel with anti-corrosion coating, austenitic alloys, and brass are used as raw materials in its manufacture.
Applications of T-shaped cotter pin fasteners
The T-shaped cotter pin to DIN 94 is mainly used in toy manufacturing. It allows moving parts to be effectively attached to a stationary base or to each other. The cotter pin allows toy parts to rotate 360° in one plane. In some cases, cotter pins are used in pairs to increase mobility, but this somewhat reduces the stability of the product.
The FLOK catalogue features a range of T-shaped cotter pins with various parameters, made of carbon steel, stainless steel, and brass.
Design and installation features of the T-shaped cotter pin
T-shaped cotter pins are made from special wire that is flattened on one side along its entire length. The manufacturing process takes place in stages. First, the prepared wire sections are bent so that one end is longer than the other. Then a head is formed as a crossbar perpendicular to the working shaft.
The wire diameter, crossbar width, and cotter pin length vary over a fairly wide range, which allows them to be installed in toys of different weights and sizes. The length parameter refers to the size of the working rod, excluding the thickness of the head.
T-shaped cotter pins work together with special discs, the size of whose inner hole must match the diameter of the wire from which the fastener is made. These parameters are important when selecting fastening elements, as they serve as the basis for determining allowable loads and an indicator of the product’s rigidity.
In addition, metal washers are included in the parts fastening assembly. They are installed on both sides of the disc. During toy assembly, the cotter pin is passed through the holes of the three elements. On one side of the fastening assembly remains the T-shaped crossbar, and on the other – the prongs, which need to be bent.
The entire assembly remains inside the toy and is invisible in the finished product. DIN 94 cotter pins have corrosion protection or are made of stainless chromium-nickel steel. Therefore, toys assembled with them can be cleaned, washed, and laundered without any effect on the fastener.
FLOK supplies T-shaped cotter pins from stock and made to order, including to custom sizes.
| Name | Size | Unit of measure |
|---|---|---|
| T-shaped cotter pin | 1.6x20 mm | pcs |
| T-shaped cotter pin | 2x20 mm | pcs |
| T-shaped cotter pin | 2.5x28 mm | pcs |
| T-shaped cotter pin | 3.2x32 mm | pcs |
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