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Posted by Geoffrey Johnson on August 17, 2008, 1:11 pm
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PaulIngram wrote:
> Hi
> I'm a newbie on here but have just acquired a Harrison M300 and am in
> the process of getting it all into life.
> On inspecting the machine a bit more carefully, I find that the Lead
> screw floats lengthways by maybe a quarter of an inch or so :confused:
A look at the parts list should tell you all.
On the end of the leadscrew is a nut with two flats. At the bottom of the
hole in the centre is a cap-head grub screw. It works like an internal
locknut. Loosen the grub screw and then you can adjust for zero clearance.
However there should be a pair of thrust ballraces, one either side of the
block that's screwed to the bed. If one of those were missing I reckon
you'd end up with about a quarter of an inch of slack!!!!
Could this be your problem?
I dismantled, cleaned and re-adjusted mine only last week.
G
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