Bosch Rexroth GTM Series, Project Planning Manual

Page: 33 / 90

Planetary Gearboxes Notes Regarding Application
5-5
DOK-GEAR**-GTM********-PR01-EN-P
To properly check the shaft loading, the axial and radial shaft loads
have to be checked separately:
The radial shaft load must be checked with respect to
•
the point of application of force and
•
the average speed
Please see the diagrams in chapter 6.2 “Permitable shaft loading”. All
ratings are based on an a rated bearing time of 30,000 operation hours
(bearing calculation according to DIN ISO 281:1993-01).
The axial shaft loading is also described in the chapter 6.2 “Permitable
shaft loading”.
The output shaft of the GTM gearboxes is fitted with a shoulder, which is
well-suited for the support of axial forces, especially for keyed
connections.
The proper tightening torque (T
A
), and pully preload forces (F
V
), for
mounting the output unit can be found in the following table.
Size (one stage & two stage)
GTM060 GTM075 GTM100 GTM140 GTM180 GTM240
Thread M5 M8 M12 M16 M20 M20
T
A
[Nm] 5,5 23 79 195 390 390
F
V*
[kN] 6,5 17 40 75 120 120
Fig. 5-5: Tightening torque, and preload opf output shaft
TA
FV
GG000008v01_en.EPS
T
A
: Tightening torque
F
V
: Preload
Fig. 5-6: Output shaft
Shaft loading
Assembly of output elements