spindle cross section view

[Jonathan]

Surely you want angular contact bearings? I've got a spare pair FAG 7206 bearings... ABEC7 grade (so intended for spindles)! If you're interested...

You need to work it out such that the spindle temperature remains in a certain range, so etc.

[Ross77]

Cheers, yeah I do I was just trying to clarify what coredump was suggesting with the needle bearings.

I already have a matched pair of Barden precision bearings 109HDL (45mm int.) for the nose, if I can make the spindle accurattly then most of an ER 32 collet will be in side the bearing anyway. I do need some bearings for the rear but they will need to be floating or have end float, allowing them to slide on the shaft or housing just adds more maching headaches.

I intend to do a practice run first so might be intested in the bearings.what size are they,contact angle , clearance etc.

cheers