Lh Thread - WABECO D4000 E Operating Instructions Manual

3. Changing the feed from 0,085 mm to a metric pitch of 1,5 mm
Start the procedure exactly as already described. Only toothed belt pulley Z 48 on bolt A has
additionally to be substituted by toothed belt pulley Z 34.
The feed is switched over via the lever grip on the front side of the cam box. When cutting thread
please make sure that the feed remains permanently switched on so that the turning chisel gets
into the same position every time in the case of several cuttings.
For this reason, when you have finished cutting, the chisel is turned out with the cross slide and is
brought back by means of a change of direction of the motor via the reversing switch into the origi-
nal position.
10.2.4

LH thread

To cut an LH thread all you have to do is bring the RH take-up wheel on the tumbler gear and link it
into the drive wheel on the main spindle.
In figure 2.4 you can see the position when cutting an LH thread. In order to pivot the tumbler gear
all you have to do is loosen the clamping screw.
11 Three-jaw chuck and four-jaw chuck
.
The three-jaw chuck
serves to clamp circular, triangular and hexagonal workpieces centrically to the spindle axis.
The four-jaw chuck
serves to clamp square workpieces centrically to the spindle axis.
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