Operating instructions

9. Pair of toothed wheels for left-hand thread cutting

For cutting left-hand threads, toothed belt wheel No. 11214 on bolt A must be replaced by toothed

wheel Z 75 and toothed belt wheel No. 1114 on the main spindle must be replaced by toothed belt

wheel Z 50.

To do this, proceed in the following manner:

a. Pull the mains plug, loosen the hexagon socket screw on the front of the headstock and open

the cover. Remove the belt from the main spindle.

b. Loosen lock screw D of the quadrant. Loosen bolt A and B on the quadrant and remove the

toothed belt.

c. Shift bolt A on the quadrant upwards and bolt B downwards.

d. Loosen and remove the nut and washer of bolt A. Remove the toothed belt wheels No. 114114

and No. 11214 from bolt A.

e Loosen the headless pin on the adjustment nut No. 1111 of the workspindle, loosen the

adjustment nut and remove it from the main spindle.

f. Remove the V-belt pulley No. 1112, the distance piece No. 1113 and the toothed belt wheel

No. 1114 from the workspindle. Mount the toothed belt of the main spindle and tighten with the

adjustment nut.

g. Mount toothed wheel Z 75 and toothed belt wheel No. 114114 onto bolt A and tighten with the

washer and the hexagon nut.

h. Mount toothed wheel Z 50, distance piece No. 1113 and V-belt pulley No. 1112 on to the main

spindle and tighten with the adjustment nut.

i. Pay attention to the correct adjustment of the tapered roller bearings, see section“headstock“

j. Put on the toothed belt from A to B, cam in the toothed gear Z 75 with Z 50 by swivelling the

quadrant, tighten lock screw D. Strain the toothed belt between A to B by shifting B.

k. Put the V belt on the workspindle and strain it. Close the cover and screw it to the headstock

with the hexagon socket.

bolt B

11214 change against Z 75

1112

1111

1114 change against Z 50