ABB MU 80, Product Manual

Page: 50 / 102

3.2 Installing gear units
Attachment screws
The tables show the attachment screws and tightening torques for the gear units.
All screws should be of quality 12.9.
MTD
Minimum thread length in
gearbox [mm] Tightening torque [Nm]
±10% Screw Gear unit
29 120 M12 MTD 250
47 550 M20 MTD 500
47 550 M20 MTD 750
50 550 M20 MTD 2000
37 950 M24 MTD 5000
MID
The maximum floor loads in relation to the base coordination system for the MID
units are described in
Product specification - Motor Units and Gear Units .
Screw Gear unit
M16 MID 500
M20 MID 1000
Prerequisites
CAUTION
Never overheat the motor. The winding temperature must not exceed 140°C.
Check that the temperature on the motor frame is lower than 100°C.
WARNING
If the gear unit is used in an arc welding station, the SMB box must always be
insulated from the weld circuit. The gearbox is isolated from the motor. See
Insulation in arc welding stations on page 64 .
Installing gear units
Use this procedure to install gear units. For cable connections, see Fastening
cables on page 53 .
Information Action
WARNING
The gear unit is heavy. Always use prop-
erly sized lifting accessories.
Fit the gear unit in position and secure it
with its attachments screws. 1
Continues on next page
50 Product manual - Motor Units and Gear Units
3HAC040148-001 Revision: K
© Copyright 2011 -2018 ABB. All rights reserved.
3 Installation
3.2 Installing gear units