LENZE
2
Drive dimensioning
Gearbox designs
2-4
L-force gearboxes en 06/2011
GST
GFL
GKR
GKS
GSS
Housing
Design
Cuboid
Material
Aluminium/Cast iron
Solid shaft
Design
With keyway to DIN 6885
Tolerance
k6 (d ≤ 50 mm)
m6 (d > 50 mm)
Material
Tempered steel C45/42CrMo4
Hollow shaft
Design
–
H: With keyway
–
S: Smooth
Tolerance
–
Bore to ISO H7 (measured with plug gauge)
Material
–
Tempered steel C45
Toothed parts
Design
Optimised tooth flanks and profile geometry
Ground tooth flanks
Material
Case-hardened steel
Case-hardened steel, bronze worm gear
Shaft-hub connection
1st stage/prestage/helical (bevel) gearbox: Friction-type connection
Output stage (= 2nd, 3rd or 4th stage): Friction-type or positive-fit connection
Shaft sealing rings
Design
With dust lip
Material
NB/FP
Bearings
Design
Ball bearing/tapered-roller bearing depending on size and design
Lubricants
Design
In accordance with DIN 51502
Fill volumes
Depends on the mounting position
Å
Operating Instructions
Mechanical efficiency
1-stage gearbox
[n
c=1
]
0.98
0.62 ... 0.92
1)
2-stage gearbox
[n
c=1
]
0.97
0.96
0.64 ... 0.92
1)
3-stage gearbox
[n
c=1
]
0.95
0.95
˘
depending on ratio
4-stage gearbox
[n
c=1
]
0.93
˘
at n
1
= 1400 rpm
Notes
˘
Housing at operating
temperature and teeth run in
1)
See ratio-dependent efficiency
General data