Ideas for fitting leadscrews

**irving2008** · 29-09-2008

Revised arrangement using back to back skate bearings and thrust nut at far end and sliding bearing at stepper end...

**irving2008** · 09-11-2008

The previous arrangement put an axial load on the skate bearings which they don't like and as a result the friction is much higher than I liked. Part 4 in the diagram is a acetal thrust bearing from BNL, supplied by RS at £0.73p which addresses the issue.

The only critical dimension is the thrust washer, part 5. The ID of this part must be large enough not to foul the shaft and the OD large enough to butt to the bearing black and not slip inside to foul the skate bearing whch is recessed 0.5 - 1mm to stop this happening.

**Robin Hewitt** · 11-11-2008

A belleville washer could save you hours of fiddling about setting that up, but just how do you plan to drill through the screw and where have the bleedin' smilies gone when I need them?

**irving2008** · 11-11-2008

what do you mean "drill through the screw"?:confused:

and the smilies are here...

**Robin Hewitt** · 11-11-2008

Originally Posted by irving2008

what do you mean "drill through the screw"?:confused:

and the smilies are here...

"The ferrules are retained on the leadscrew by a 4mm hole drilled through the ferrule and the screw".

There used to be a handy panel of smilies next to this here reply box, now it's gorn