Bosch Rexroth GTM Series Project Planning Manual page 33

Planetary Gearboxes
Shaft loading
Assembly of output elements
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
mounting the output unit can be found in the following table.
Size (one stage & two stage)
GTM060 GTM075 GTM100 GTM140 GTM180
Thread M5 M8
T [Nm] 5,5 23
A
F [kN] 6,5 17
V*
Fig. 5-5: Tightening torque, and preload opf output shaft
T : Tightening torque
A
F : Preload
V
Fig. 5-6: Output shaft
Notes Regarding Application
), and pully preload forces (F
A
M12 M16 M20
79 195 390
40 75 120
F V
T A
5-5
), for
V
GTM240
M20
390
120
GG000008v01_en.EPS