Gear units – Operating and Assembly Instructions
14 B 1000 en-2518
Gear unit types / Type designations
UNIVERSAL worm gear units
SK 1SI31, SK 1SI40, SK 1SI50, SK 1SI63, SK 1SI75,
SK 1SIS31, …, SK 1SIS75,
SK 1SID31, …, SK 1SID63,
SK 1SMI31, …, SK 1SMI75,
SK 1SMID31, …, SK 1SMID63,
SK 1SIS-D31, …, SK 1SIS-D63 (1-stage),
SK 2SMID40, SK 2SMID50, SK 2SMID63, SK 2SID40, …, SK 2SID63 (2-stage)
Versions / Options
-
A
V
L
Z
F
X
XZ
XF
AL
5
V
Foot mounting with solid shaft
Hollow shaft version
Solid shaft version
Solid shaft both sides
Output flange B14
Output flange B5
Foot mounting
Base and output flange B14
Base and output flange B5
Reinforced axial output
bearings
Reinforced output shaft
(Standard helical gear units)
Reinforced drive shaft
(Standard helical gear units)
D
K
S
VS
EA
G
VG
R
B
H
H66
VL
VL2
VL3
Torque support
Torque bracket
Shrink disc
Reinforced shrink disc
Hollow shaft with internal spline
Rubber buffer
Reinforced rubber buffer
Back stop
Fastening element
Covering cap as contact guard
Covering cap IP66
Reinforced bearings
Agitator version
Drywell agitator version
IEC
NEMA
W
VI
OA
OT
SO1
CC
DR
H10
/31
/40
Standard IEC motor
mounting
Standard NEMA motor
attachment
With free drive shaft
Viton radial seals
Oil expansion tank
Oil level tank
Synthetic oil ISO VG 220
Casing cover with cooling
spiral
Pressure venting
Modular helical pre-stage
Worm pre-stage
Worm pre-stage
Table 3: Type designations and gear unit types
Double gear units consist of two single gear units. They are to be treated as per the instructions in this
Manual, i.e. as two individual gear units.
Type designation for double gear units: e. g. SK 73/22 (consisting of single gear units SK 73 and
SK 22).
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