04-28-2015, 10:55 PM
(04-28-2015, 05:58 PM)DaveH Wrote: [ -> ]This will get me into a lot of trouble.
Your lathe was designed by engineers made by machinists.
DaveH
Yep, just when you think it's all blown over the anvil will drop.
(04-28-2015, 05:58 PM)DaveH Wrote: [ -> ]This will get me into a lot of trouble.
Your lathe was designed by engineers made by machinists.
DaveH
(04-28-2015, 09:20 PM)Pete O Wrote: [ -> ]Is crashing as much an issue with the crossfeed as with the longitudinal feed? The drive gear on the leadscrew of my lathe is a slip fit with a tapered pin, so the drive is only transmitted by the pin. However if I introduce a clearance fit into the middle of the crossfeed screw, as it is only supported at either end, I think it would cause problems with sagging in the middle (like me).
I'm not sure I have the confidence to produce a tapered fit, I'm only going to get one chance at this (unlike the threading of the new nut, thankfully) and don't want to risk destroying the driven section of the shaft.
(04-28-2015, 05:58 PM)DaveH Wrote: [ -> ](04-28-2015, 04:15 PM)EdK Wrote: [ -> ]I guess I misspoke. My lead screw is pinned but not with a shear pin. It's pinned with a 3/16" spring pin with a breaking strength of about 4100lbs.
Ed
This will get me into a lot of trouble.
Your lathe was designed by engineers made by machinists.
DaveH
(04-28-2015, 10:53 PM)Dr Stan Wrote: [ -> ]sounds like someone replaced the shear pin with a spring pin. Not too difficult to correct.
(04-29-2015, 04:54 AM)EdK Wrote: [ -> ](04-28-2015, 10:53 PM)Dr Stan Wrote: [ -> ]sounds like someone replaced the shear pin with a spring pin. Not too difficult to correct.
Nope, came right from the manufacturer that way.
Ed
(04-29-2015, 10:54 PM)Dr Stan Wrote: [ -> ]Still does not sound right. The spring pins could have been installed by an error at the factory. IMHO I'd replace it with a very soft steel or even aluminum pin just to protect the more expensive parts of the lathe.