Page 83 - Turner 1st sem Practicals

Switch off the motor. Insert the correct chuck key into a cam-locking screw on
the spindle.
Hence the chuck on the wooden board or cradle and slide
it close to the spindle nose. Turn each cam-locking screw so that the registration line
is vertical or aligns with the corresponding line on the
Turn the spindle by hand until the key on the spindle nose spindle.
lines up with the keyway in the chuck.
Turn the spindle by hand until the clearance holes on the
Set the speed-change lever to the slowest speed.
spindle align with the cam-lock studs on the chuck.
Push the chuck on to the spindle and turn the locking ring Set the speed-change lever to the slowest speed.
anticlockwise. (Fig 5)
Push the chuck on to the spindle.Tighten each cam-lock
The figure given here illustrates a small chuck held with screw in a clockwise direction.
both hands and being mounted.
Mounting on to a bolted spindle (Figs 8 and 9)
Engage the special 'C' spanner on the locking ring.
The spanner should fit around the top of the locking ring with
the handle pointing downwards.

Grip the end of the handle with one hand and firmly strike
the other end with the other hand in an anticlockwise
direction. This would securely tighten the locking ring.
(Fig 6)

Mounting on a cam-locking spindle (Fig 7)

Switch off the motor.

Place the chuck on a wooden board or cradle.
Remove nuts and washers from the studs on the chuck.
Disengage the clutch to permit free rotation of the spindle.
Turn the spindle by hand until the key in the spindle lines
up with the slot in the chuck.
Set the speed-change lever to the slowest speed.
Push the chuck on to the spindle.
Fit washers and nuts to the studs.

Switch off the motor. Hold the chuck in position when fitting nuts.
Place the chuck on a wooden board or cradle and slide it Tighten the nuts in an anticlockwise direction using a
close to the spindle nose. spanner on the opposite nuts.
Disengage the clutch to permit free rotation of the spindle.

Producltion & Manufacturing : Turner - Exercise 1.3.24 71