40
11.
Pair of toothed wheels for left-hand thread
To cut left-hand threads, the toothed belt gear No. 11214 on bolt A is to be exchanged for the
toothed gear Z 75 and the toothed belt gear No. 1114 on the work spindle exchanged for the
toothed gear Z 50.
To do this, proceed in the following manner:
a. Pull out the mains plug, loosen the hexagon socket screw at the front side of the headstock
and open the cover. Remove the belt from the workspindle.
b.
Loosen the screw D of the quadrant. Loosen bolt A and B on the quadrant and remove toothed
belt.
c.
Remove bolt A on the quadrant upwards and bolt B on the quadrant downwards.
d.
Loosen nut and washer from bolt A and remove. Loosen toothed belt gear No. 114114 and No.
11214 from bolt A and remove.
e
Loosen the headless pin on the adjustment nut No. 1111 on the workspindle. Loosen the
adjustment nut and remove from the workspindle.
f.
Remove the V-belt pulley No. 1112, the separator bush No. 1113 and the toothed belt gear No.
1114 from the workspindle. Mount the toothed belt from the workspindle and tighten firmly with
the adjustment nut.
g.
Mount toothed gear Z 75 and the toothed belt pulley No. 114114 on to the bolt A and tighten
with the washer and the hexagon nut.
h. Mount toothed gear Z 50, separator bush No. 1113 and V-belt pulley No. 1112 on to the
workspindle and tighten with the adjustment nut.
i.
Pay attention to the correct adjustment of the tapered roller bearings see section“headstock“
j.
Lay the toothed belt from A to B, cam in the toothed gear Z 75 with Z 50 by swivelling the
quadrant, tighten the screw D. Tense the toothed belt from A to B through removing B.
k.
Lay the drive belt on the workspindle and tense . Close the cover and tighten with the hexagon
socket screw at the headstock.
bolt B
11214 change against Z 75
1112
1111
D
1114 change against Z 50
