Hi Guys,

I need some advice !

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I've been trying to make some bearings. The pictures show what I've been making !
My issue is whilst holding these in a square ER32 collet block, they are moving and causing the faces to be machined at an angle. I thought that the collet was not tight enough and have tried with a 12" inch wrench to tighten them further, but they still slip round. This is my third lot and is probably the best of the bunch.

The threaded bit is 8 mm in diameter and 10 mm long, the head is 10 mm thick and 18 mm diameter before putting the flats on.

Help !!!
Attached Images




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