SIEMENS
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Siemens D 21.4 · 2017
SIMOTICS servomotors
SIMOTICS S geared motors for SINAMICS S120
Planetary gearbox series SP+ for SIMOTICS S-1FK7
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Overview
SIMOTICS S-1FK7 motor with mounted SP+ planetary gearbox
SIMOTICS S-1FK7 motors can easily be combined with plane-
tary gearboxes to form compact coaxial drive units. The gear-
boxes are flanged directly to the drive end of the motors.
When selecting the gearbox, ensure that its maximum permissible
input speed is not exceeded by the maximum speed of the motor.
In the case of high operating frequencies, allowance must be made
for the factor
f
2
(see Configuration Manual, SIMOTICS S-1FK7
synchronous motors). The frictional losses of the gearbox must
always be taken into account when engineering geared drives.
The gearboxes are only available in non-balanced design.
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Benefits
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High efficiency
Single-stage: > 97%
Two-stage: > 94%
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Minimum torsional backlash
Single-stage:
≤
4 arcmin
Two-stage:
≤
6 arcmin
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Power transmission from the central sun wheel via planet
wheels
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No shaft deflections in the planet wheel set due to symmetrical
force distribution
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Very low moment of inertia and thus short acceleration times
of the motors
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Output shaft bearings dimensioned for high cantilever and
axial loads with preloaded tapered-roller bearings
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The gearboxes are connected to the motor shaft via an inte-
grated clamping hub. A plain motor shaft extension is neces-
sary for this purpose. Shaft and flange accuracy tolerance N
in accordance with DIN 42955 and vibration magnitude grade
A in accordance with EN 60034-14 are sufficient. The motor
flange is adapted by means of adapter plates.
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Output shaft of gearbox exactly coaxial with the motor
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The gearboxes are enclosed (seal between gearbox and
motor) and filled with oil at the factory. They are lubricated and
sealed for their service life.
The gearboxes are suitable for all mounting positions.
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Degree of protection of gearbox: IP65
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Small dimensions
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Low weight
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Integration
SIMOTICS S-1FK7 motors can be supplied ex works
(Siemens AG) in the shaft heights 28 to 100, complete with
flange-mounted planetary gearbox.
The gearboxes assigned to the individual motors and gear ratios
i available for these motor/gearbox combinations are listed in the
subsequent selection table. The maximum permissible input
speed of the gearbox (this is the same as the maximum motor
speed) must be taken into account when a gearbox is selected.
The motor/gearbox combinations listed in the selection table are
mainly intended for cycle operation S3-60% (ON time
≤
60 % and
≤
20 min). Reduced maximum motor speeds and output torques
apply for use in S1 continuous duty (ON time > 60 % or
> 20 min). The gearbox temperature must not exceed 90 °C
(194 °F).
Follow the instructions contained in the Configuration Manual for
SIMOTICS S-1FK7 synchronous motors when assigning gear-
boxes to the motor.
© Siemens AG 2017