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17.2.2 Checking the fit of the jaw chuck
17.2.3 Mounting workpiece holders
The max. spindlespeed of the machine must be lower than the max. permissible
speed of the used workpiece holder.
Jaw chuck / face plate
Centring tip
17.2.4 Adjusting the headstock
The headstock (1) was aligned at the factory. If, contrary to expectations, an adjustment is
required, proceed as follows:
HOLZMANN MASCHINEN GmbH
NOTICE
Do not use cast iron chucks. Use ductile iron chucks only. Before
disassembling the jaw chuck, place a stable board or chuck cradle
under the spindle to protect the precision-ground surfaces.
WARNING
1. Check the fitting surfaces on the turning spindle mounting (2)
and on the flange to be mounted for the jaw chuck (1) or face
plate for cleanliness and undamaged mounting surfaces.
2. Insert the threaded bolts into the mounting holes.
3. Fix the jaw chuck or face plate with nuts and washers (3).
1. Clean the inner taper of the spindle holder.
2. Clean the morse taper and the taper of the centering tip.
3. Press the centring tip with the morse taper into the inner
taper of the turning spindle holder.
Clamp one end of a steel tube 150 mm long and 50 mm in
diameter into the headstock chuck. The other end runs free.
Now remove a thin layer with a sharp turning chisel. The
values measured with the dial gauge or calliper at points A and
B must match. If this is not the case, loosen the four
headstock fixing screws (J) to correct the difference (two are
below the headstock) and readjust using the adjusting screw
(K). Then tighten the fixing screws again and repeat the
rotation, measurement and adjustment until the measured
values match and the machine runs smoothly.
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