Annex 5 - Installing The Motor On Type Vfr Worm Gear Units - Siemens SIMOTICS GP Compact Operating Instructions

ANNEX 5 - INSTALLING THE MOTOR ON TYPE VFR WORM GEAR UNITS

2
3
1
8
1) Thoroughly clean and degrease the motor shaft and pinion (1) and bushing (2) coupling surfaces.
2) Check the motor shaft tolerance meets the following specifications:
Shaft diameter - Æ [mm]
11 - 28
38 - 48
3) Preheat the bushing (2) and pinion (1) to 80-100 °C.
4) Quickly fit, the bushing (2), key (3) and pinion (1), in succession, to the motor shaft.
When fitting the bushing (2), ensure that the chamfered side is facing the operator.
To facilitate mounting, lightly press on the parts being fitted (e.g. with a tubular drift). Make sure that the
reaction force in this case is supported at the opposite end of the shaft, and not by the fan cover.
After this procedure the pinion (1) should be snug against the bushing (2).
5) Lock the assembly with the spacer (4) and washer (5) by tightening down the bolt (6) or, for configura -
tions which have this option, fit the stop bushing (B1) and tighten down the two grub screws (7) while hol -
ding it snug against the pinion (1); see figure on the right.
6) Lubricate the seal ring lips with a film of grease.
7) For type VFR 49 units, which are lubricated for life and, hence, do not have a service plug, fill with the
quantity of lubricant specified in the corresponding chapter of the catalogue dealing with lubrication of
VFR units.
8) Hold the motor firmly and, holding it in alignment, mount it to the flange of the additional helical reduction
casing. Take the greatest care to avoid denting the pinion or gear wheel teeth.
9) With the motor and gear unit flanges in contact, fully tighten down the mounting bolts (8) gradually and in
a cross-wise pattern.
10) For units VFR 110 to VFR 250 the lubricant must be changed periodically.
The lubricant charge (fil) for these gear units is given in the VF catalogue. Check that the correct level
has been reached via the sight glass, with the gear unit in its specified mounting position. Top up as ne -
cessary.
2
6
5
3
1
4
8
Tolerance
j6
k6
B1
7
47