Harrison M250 - Page 14

12
Operational notes continued
Micrometer dials are direct reading (for work piece diameter reduction on the
cross-slide) and are of the friction-grip type for easy index settings.
Longitudinal traverse
handwheel (23) may be disengaged by pulling it away from
the apron face.
Tailstock
set over adjustment - is provided in the form of socket screws ( 17) mounted
in each side of the tailstock body, - a similar but 'location -screw' is fitted in the rear
face
of the body .
Set - over adjustment is made as follows: -
Unclamp the tail stock - ( lever 14)
Slacken the rear 'location-screw' (say one half turn)
Then Alternatively slacken one set-over screw and tighten the other until the required
setting is
achieved.
Tighten the rear 'location - screw'
And Re-clamp the tailstock.
Leadscrew Drive
Drive to the leadscrew is obtained by first removing the torque limiter cover plate. Then slide
the driving sleeve towards the gearbox so engaging the shear pin with the leadscrew shaft. When
not in use it is recommended that the leadscrew be disengaged.