Page 148 - Turner 1st sem Practicals

Brush down the machine to clear away any loose metal or
abrasive particles.
Remove any loose particles from and around the clamp
and nut with a brush.
Loosen the work-rest clamp with the correct size spanner.
Slide the rest as far back from the wheel as possible.
Remove it completely, if necessary. (Fig 7)
Undo the clamping screws and remove the outer plate of
Remove any burrs in the bore with a half round scraper. the wheel guard. (Fig 7)
(Fig 5)

The hole should have a free sliding fit on the machine
spindle.
Never force a wheel on to the spindle. Loosen the nut using a spanner of the correct size.
(Fig 8)
Abrasive wheels must be mounted on the spindle between
steel flanges of equal size. They should be half the diameter
of the wheel but never less than one third. The flanges are
recessed on the side in contact with the wheel. The inner
flange is firmly fixed to the spindle to give a positive drive.
(Fig 6)

Check and ensure the direction in which the
nut needs to be turned to loosen it.
Unscrew the nut from the spindle and remove the outer
flange. (Fig 9)

Tighten the nut sufficiently to hold the wheel firmly without
slipping.

Excessive tightening will cause damage to the
wheel.
Fitting a new wheel on to a machine
Switch off the power supply to the machine at the isolator
switch.
Producltion & Manufacturing : Turner - Exercise 1.3.42 135