ER16 Collet Chuck for Unimat M12X1 Spindle

[mister-pete]

Oh that's nice , great job I have tried quite a few times but I cant get a good run out … I tried buying cheap motor mounted er16 and er25 chucks and drilling and tapping using my unimat but can't find the right setup I dont have and other way to do it. is there a place I can buy one ready made I realy would like both ER16 and a ER25.

[Paul Jones]

mister-pete,
I have tried buying accuate M12X1 threaded ER-16 collet chucks for the 3" swing Unimat but all were way out of the specs I needed for a 0.0002" runout. This is why I made my own chucks. Follow the directions for how I made the ER-16 chuck. Also buy the best ER-16 collets {mines are made by Techniks). These are expensive to be +/- 0.0001" to +/-0.0002" run-out but worth a once in the lifetime investment.
Paul