3.5 Shaft extension
The motors are supplied with cylindrical shaft extensions. The shaft extension usually has a
centering thread according to DIN 332, form DR.
Optionally, a shaft extension with a keyway and feather key can be supplied.
For the 1FK2☐03 and 1FK2☐04 with degree of protection IP65, the radial shaft seal ring
shortens the useful shaft extension.
Frame size Shaft dimensions
with IP64
Diameter × length in
mm
Shaft dimensions with
IP65
Diameter × length in
mm
Fitted key
Width × height ×
length in mm
Centering
thread
DIN 332-DR
1FK2☐03 14 (h6) × 30 14 × 21.5 5 × 5 × 16 M5
11 (k6) × 23
1)
- - M4
1FK2☐04 19 (k6)× 40 19 × 32 6 × 6 × 22 M6
14 (k6) × 30
1)
- - M5
1FK2☐05 19 (k6) × 40 6 × 6 × 32 M6
1FK2☐06 24 (k6) × 50 8 × 7 × 40 M8
1FK2☐08 32 (k6) × 58 10 × 8 × 45 M12
1FK2☐10 38 (k6) × 80 10 × 8 × 70 M12
1)
Shaft extensions 11 (k6) mm × 23 mm and 14 (k6) × 30 are only available without keyway and
without shaft sealing ring (IP65).
Mechanical properties
3.5 Shaft extension
1FK2 Synchronous Motors for SINAMICS S120
Conguration Manual, 02/2022, A5E46927724B AD 41
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