Marine Man
Member
- Joined
- Nov 16, 2010
- Messages
- 15
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- 1
Guys I need some advice here.
Recently I have changed lathes from an old Myford 7 to a pristine (I mean really pristine! - I know the history of this machine and the guy that owned it was a real perfectionist!) Myford Super 7.
It is mounted on a steel cabinet which is bolted to the concrete floor and the lathe itself is raised on steel riser blocks. When I was torquing down the holding bolts (Clock on the end of some 20mm round stock gripped in the chuck), the clock initially moved one hundredth of a mm on the last bolt. I released all the bolts again and shimmed it then torqued it down a second time with no movement of the clock this time. In curiosity I grabbed the end of the bed by hand and twisted it and got the same movement on the clock (one hundredth) only the clock did not return to zero when I released it. If I twisted the other way then it would return to zero.
I have checked everything and there is no damage to the bed and the lathe turns true on the parallel. My question is should I worry about this movement? I am begining to suspect that the cabinet might be a bit flimsy but I never thought I would get that movement on the bed by applying hand force. Any suggestions or advice would be very welcome. Thanks.
Paul
Recently I have changed lathes from an old Myford 7 to a pristine (I mean really pristine! - I know the history of this machine and the guy that owned it was a real perfectionist!) Myford Super 7.
It is mounted on a steel cabinet which is bolted to the concrete floor and the lathe itself is raised on steel riser blocks. When I was torquing down the holding bolts (Clock on the end of some 20mm round stock gripped in the chuck), the clock initially moved one hundredth of a mm on the last bolt. I released all the bolts again and shimmed it then torqued it down a second time with no movement of the clock this time. In curiosity I grabbed the end of the bed by hand and twisted it and got the same movement on the clock (one hundredth) only the clock did not return to zero when I released it. If I twisted the other way then it would return to zero.
I have checked everything and there is no damage to the bed and the lathe turns true on the parallel. My question is should I worry about this movement? I am begining to suspect that the cabinet might be a bit flimsy but I never thought I would get that movement on the bed by applying hand force. Any suggestions or advice would be very welcome. Thanks.
Paul