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11th June 2019, 10:30 PM #1Most Valued Member
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Harrison M250 Cross-slide Dual Scale Problems
My M250 has always exhibited slipping of the dials on the cross-slide, initially not too serious and easy too recognize and allow for.
But it got worse during a recent screw-cutting job and the decision made to dis-assemble to clean and fettle as appropriate, how hard could it be ?
Bad mistake.
These dual scaled dials are a nightmare to re-assemble onto the screw shaft.
Assembly appears to require positioning a Woodruff key at the bottom of an annular tunnel and engaging a matching piece without guides, visibility or ability too observe/check final positioning.
This is a cry for help from anyone with experience of Harrison dual scaled dials.
Thanks in advance,
John.
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