FLENDER REDUREX - Bolt Connection Classes; Table 5-1 Information on Tightening Fastening Bolts

Note
Replacing bolts
Replace any bolts that are no longer fit for use by bolts of the same type and strength class.
Mating threads
The mating threads must have the following properties:
● Made of steel or cast iron
● Dry, cut threads
Note
Using a lubricant
As a rule, lubricants may not be used, because this can result in the bolt connection becoming
overloaded.
5.8.2 Bolt connection classes
In order to affix fastening bolts, note the information in the following table:
Table 5-1 Information on tightening fastening bolts
Mounting Bolt connection
class
Scatter of the tor‐
que emitted on the
tool
Tightening procedure
Gear unit
Motor
Brake
Torque arm
C ± 5 % to ± 10 %
● Hydraulic tightening with
mechanical screwdriver
● Torque-controlled tightening with
a torque wrench or a signal-
emitting torque wrench
● Tightening with a precision
mechanical screwdriver with
dynamic torque measurement
D ± 10 % to ± 20 %
● Torque-controlled tightening with
mechanical screwdriver
Protection cover
Sun shield
E ± 20 % to ± 50 %
● Tightening with pulse
screwdriver or impact wrench,
without adjustment checking
device
● Tightening by hand, using a
wrench without torque
measuring device
Mounting
5.8 Tightening procedure
REDUREX Gear unit 5200en
78 Operating Instructions 03/2019