Using grooved pins - ISO 8745 / DIN 1472

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The type of grooved pin you need depends on what specific purpose it will serve.

Grooved pins can have various uses in an assembly:

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• Solidity: Holding two parts together thanks to its machined grooves and the pressure they exert on the hole in which they are inserted.
• Connection & rotation: Grooved pins allow for pivot movement between two elements, like in door hinges.
• Positioning: Grooved pins enable two parts to be positioned relative to each other, in order to then add another fastener, e.g. a screw.

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Based on these three functions, we can recommend the type of pin best suited to your needs.

In most cases, we would recommend using ISO 8745 / DIN 1472-standard pins to meet connection needs in assemblies where one part must be able to rotate relative to another.

To ensure both parts are solidly fastened, blocking any and all degree degrees of freedom, the full length of the grooved pins is to be used. The grooves allow the pin to fit tightly into the two parts.

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Three types of pins can be used for this purpose:

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• ISO 8739 / DIN 1470
• ISO 8740 / DIN 1473
• ISO 8744 / DIN 1471

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Pins with constant grooves, like the ISO 8744 / DIN 1471 standard pins, allows the pin to be pre-positioned thanks to a slight bulge (a few millimetres) in its diameter. This keeps the pin in place before it is completely pressed in.

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ISO 8744 or DIN 1471-standard pins have grooves all along their length, allowing for the part to be pre-positioned in the assembly, on the side where bulge diameter is smallest.

Once in place, a press is used to ensure the pin is installed snugly with the help of its grooves.

This is what makes this grooved pin different from the other two, which have constant grooves all along their length.