User Guide

Converting machines from inch to metric or vice versa
All Sherline tools and accessories are manufactured in your choice of inch or metric
calibrations. Converting a lathe or mill from one measurement system to the other is
possible, but it takes more than changing the handwheels. The leadscrews, nuts and
inserts must also be changed. A look at the exploded views of the machines on pages 27
and 28 will show which parts need to be purchased. (Look for parts that have both a
metric and inch version in the parts listing.) Conversion kits with all the necessary parts
are available. If you are a good mechanic, you can do the conversion yourself, or you can
return your machine to the factory for conversion.
ADJUSTMENTS
Two-speed pulley
The normal pulley position, which is placing the belt on the larger motor pulley and
smaller headstock pulley, will suffice for most of your machining work. Moving the belt
to the other position (smaller motor pulley, larger headstock pulley) will provide
additional torque at lower RPM. It is particularly useful when turning larger diameter
parts with the optional riser block in place.
FIGURE 11-The two pulley positions. Position A is the conventional setting, position B
offers more torque at low RPM. (Seen from pulley end of headstock.)
To change the pulley position, remove the speed control hold down screw and pivot the
speed control housing up out of the way. Remove the mounting plate from its position on
the rails of the two halves of the belt guard housing. Loosen the two nuts that hold the
motor to the motor mounting bracket and take the tension off the belt. With your finger,
push the belt off the larger groove of the pulley and into the smaller one. (Depending on
which way you are changing it, this could be either the motor or spindle pulley.) Then
move the belt to the larger diameter groove on the other pulley and rotate the headstock
by hand to get it to seat. Push the motor outward on the motor mounting bracket to put
the proper tension on the belt and retighten the two motor mounting screws. Now you can