E&OE
© 2020 Baumr-AG
39
Gear Chart for Cutting Metric Threads
Gear
A
B
C
D
0.4
20
50
40
60
0.5
20
50
60
0.6
40
50
30
60
0.7
40
50
35
60
0.8
40
50
40
60
1.0
20
60
30
1.25
50
40
60
1.5
40
60
40
1.75
35
60
30
2.0
40
60
30
Examples
:
32. Ref. Fig. A
To cut 0.5mm/T, use 20T in position A, 50T in position B, 60T
in position D, and any convenient gear in position C.
33. Ref. Fig. B
To cut 0.4mm/T, use 20T in position A, 50T in position B, 40T
in position C, 60T in position D.
In order to change the gears, ensure the machine is switched
OFF and disconnected from the mains supply. Remove the gear
train cover which is secured with two hex socket head screws.
Gear A may be considered as the Driver, and Gear D as the
Driven gear.
When a Simple gear train is configured, as illustrated in Fig. At
the gear at B acts as an Idler and its size is therefore irrelevant -
any convenient gear will suffice to connect A and D. This is
denoted by a blank space in the column in the gear chart.
The positions of the shafts carrying gears A and D are fixed,
therefore all adjustments are carried out on the shaft carrying
gears Band C and the Adjuster 'A', shown in Fig. 10.
34. Unscrew the hex socket head screws, securing gears A and
D, followed by the screw securing gears B and C.
35. To allow the gears Band C to disengage completely and to provide for easier reassembly, unscrew the nut
securing the shaft carrying B and C and the nut securing the adjuster A.
36. Remove the gears, taking care to retain the small keys on each shaft, and replace with those necessary to
produce your screw thread. They may be mounted either way round.
The number of teeth on each gear is clearly marked. Replace the securing screws, ensuring the flat washer
bears up against the gear hub in each case.
