View Full Version : Spindle Taper Question

05-07-2006, 09:33 AM
I have a spindle that has a CAT30 taper. Does anyone know if this is interchangeable with NMTB-30 and/or V-flange 30 and/or BT-30?

05-07-2006, 11:03 AM
The actual size and angle of the taper is the same. There are differences in the "tang", e.g. NMTB has a straight tang at the end, the CAT has no tang. The flange and drive keys wll differ slightly, but can normally be modified if needed.

I believe Cat and V-Flange are diffferent names for the same thing.

05-07-2006, 11:15 AM
Thanks Big-Dipper. I want to outfit this spindle with a quick change collet chuck, sized to accept Ortlieb collets (which I have many of). I can only find the chuck with NMTB 30 taper shank. It looks like the CAT30 internal socket on the spindle has a recess for the straight tang you speak of. I'm not really worried about the drive keys, I'll modify accordingly.

Thanks for sharing your knowledge,

05-07-2006, 06:08 PM
The BT40 has metric threads, all the same but different drawbars will set you up nicely.

05-08-2006, 01:17 AM
Thanks guys for your help,.....much appreciated.