- Joined
- Aug 1, 2018
- Messages
- 16
New to the forum all.
Retired and setting up a garage shop,bought a Griz gunsmith lathe and the G0755 mill.The lathe met my expectations and the mill for the price was OK.Problem
seems that the bottom bearing on the R-8 end is running hot on higher speeds.No help from Griz techs as to what hot is.Ive seen here some of you guys have the 755 and would be interested in getting your opinions.I have over 50 years experience working with opposed Timken bearings and preload or clearance is usually established with spacers.I removed the quill assy. and loosened the lock nut (dead tight)and loosened 1/4 turn.Reassembeled and no change in heat.10 minuets run time on hi 3 you cant hold your hand on R-8 end. F Y I I took a white rag with oil applied and wiped the spindle bore and the rag was black with cast iron particles.Kept at it until no discoloration noted. I read where to remove spindle from quill you have to press spindle out.Makes no sense that both upper and lower bearings are pressed on the spindle if the lock nut is used to set preload!!!!Any thoughts
Mike AKA Indian Chief
Retired and setting up a garage shop,bought a Griz gunsmith lathe and the G0755 mill.The lathe met my expectations and the mill for the price was OK.Problem
seems that the bottom bearing on the R-8 end is running hot on higher speeds.No help from Griz techs as to what hot is.Ive seen here some of you guys have the 755 and would be interested in getting your opinions.I have over 50 years experience working with opposed Timken bearings and preload or clearance is usually established with spacers.I removed the quill assy. and loosened the lock nut (dead tight)and loosened 1/4 turn.Reassembeled and no change in heat.10 minuets run time on hi 3 you cant hold your hand on R-8 end. F Y I I took a white rag with oil applied and wiped the spindle bore and the rag was black with cast iron particles.Kept at it until no discoloration noted. I read where to remove spindle from quill you have to press spindle out.Makes no sense that both upper and lower bearings are pressed on the spindle if the lock nut is used to set preload!!!!Any thoughts
Mike AKA Indian Chief