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I’ve found better pulleys for the K8400, They are exactly the same as the Velleman pulleys, only now with 6mm (instead of 2mm) wall thickness where the screw holes are located, and 2x M4 grubscrew holes (Instead of M3).

[IMG]https://www.mupload.nl/img/xhe4c5v5qxbzr.jpg\[/IMG\]

You can order them at

Please state with your order

Model : Pulleys for Vertex K8400

Material: Alloy

Timing: T2.5

​Teeth: 19

Teeth width: 12mm

​Bore: 8mm

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Photo of the better quality pulleys for the K8400

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