4
Mechanical installation
Shaft-mounted gear unit with shrink disk
Assembly and Operating Instructions – Explosion-Proof Gear Units
59
Gear unit type
Locking screw
ISO 4014/ISO 4017/
ISO 4762
Tightening
torque ± 4%
Nm
KH..
FH..
SH..
WH..
37/39/47/49/57/67/77
37/47/57/67/77
47/57/67/77
47
M6
12
87/97
87/97
87/97
–
M8
30
107
107
–
–
M10
59
127/157
127/157
–
–
M12
100
167
–
–
–
M16
250
187
–
–
–
M20
470
5. After installation, make sure the remaining gap "s" between the outer rings of the
shrink disk is > 0 mm.
6. To prevent corrosion, grease the outside of the hollow shaft around the shrink disk.
4.11.2
Removing the shaft-mounted gear unit
Proceed as follows:
1. To prevent the outer rings from jamming, loosen the locking screws for a quarter
turn, one after the other.
2. Steadily loosen the locking screws one after the other, but do not remove the lock-
ing screws completely.
3. If rust has formed on the shaft in front of the hub, remove the rust.
4. Remove the shaft or pull the hub off the shaft.
5. Remove the shrink disk from the hub.
INFORMATION
There is no need to dismantle removed shrink disks before they are reinstalled.
4.11.3
Cleaning and lubricating shaft-mounted gear units
Proceed as follows:
1. If the shrink disk is dirty, clean and lubricate the shrink disk.
2. Lubricate the tapered surfaces. Use one of the following solid lubricants:
Lubricant (Mo S2)
Sold as
Molykote 321 (lube coat)
Spray
Molykote spray (powder spray)
Spray
Molykote G Rapid
Spray or paste
Aemasol MO 19P
Spray or paste
Aemasol DIO-sétral 57 N (lube coat)
Spray
3. Grease the locking screws with a multipurpose grease such as Molykote BR 2.
24804134/EN – 05/2018