FLENDER K.SH - Final Work; Table 5-2 Preload Forces and Tightening Torques

Assembly
5.7 Final work
78 Edition 06/2022 A5850-02en
Nominal
thread dia-
meter
Bolt
strength
class
Preload force for bolt connection
classes from the table in chapter
Bolt connection classes
(Page76)
Tightening torque for bolt connec-
tion classes from the table in
chapter Bolt connection classes
(Page76)
d
mm
C D E C D E
F
M min.
N
M
A
Nm
M64 8.8 744000 476000 298000 11000 9480 8460
10.9 1060000 676000 423000 15600 13500 12000
12.9 1240000 792000 495000 18300 15800 14100
M72x6 8.8 944000 604000 378000 15500 13400 11900
10.9 1340000 856000 535000 22000 18900 16900
12.9 1570000 1000000 628000 25800 22200 19800
M80x6 8.8 1190000 760000 475000 21500 18500 16500
10.9 1690000 1100000 675000 30500 26400 23400
12.9 1980000 1360000 790000 35700 31400 27400
M90x6 8.8 1510000 968000 605000 30600 26300 23500
10.9 2150000 1380000 860000 43500 37500 33400
12.9 2520000 1600000 1010000 51000 43800 39200
M100x6 8.8 1880000 1200000 750000 42100 36200 32300
10.9 2670000 1710000 1070000 60000 51600 46100
12.9 3130000 2000000 1250000 70000 60400 53900
Table5-2: Preload forces and tightening torques
5.7 Final work5.7 Final work
Measures
Once all the elements have been assembled or connected, perform the following final work:
• Check whether all devices dismantled for transportation have been reassembled.
• Check all bolt connections for tightness after installation of the gear unit has been com-
pleted.
• Check the alignment after tightening the fastening elements. The alignment must not
have changed in any way.
• Safeguard the oil drain valves against accidental opening.
• Protect the gear unit against falling objects.
• Check that the guards over rotating parts are securely fastened.
Contact (accidental or deliberate) with rotating parts is not permitted.