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Your benefits

High flexibility
with direct motor mounting because there is no longer any need for an adapter with clamp coupling.

Incredible performance
thanks to the high operating speeds and efficiency levels.

High reliability
due to the wear-free gearing and consistently low rotational clearance.

BS.F series helical-bevel servo gear units
Low-backlash planetary servo gear units – remarkably effective!

High speeds and torques combined with precision and efficiency: Our two series of compact planetary servo gear units offer you a huge number of possible solutions, as well as a range of motor mounting options with the EPH motor adapters for PS.F and the ECH adapters for PS.C.

With consistently low rotational clearance, high torsional rigidity and a high level of efficiency, these highly precise and extremely powerful servo gear units constitute an optimal basis for a variety of servo drives.

The PS.F planetary servo gear units are designed for nominal torques of 25 Nm to 3,000 Nm; the PS.C series is designed for nominal torques of 30 Nm to 320 Nm.

All gear ratios from i = 3 to i = 100 are integers and finely stepped. This means that the servo gear units are particularly suitable for use with controllers that require integer resolution ratios.

Only half the solution without a motor? Then take advantage of our modular concept and combine the servo gear units of the BS.F and PS.C series with the dynamic servomotor of your choice.

Contact form Worldwide locations SEW-EURODRIVE Sverige Surface and corrosion protection
  • Low-backlash planetary servo gear units
  • Designed for nominal torques from 25 Nm to 3 000 Nm
  • Available in three output variants:
    • PSF: B5 output, flange, smooth solid shaft (without key)
    • PSKF: B5 output, flange, solid shaft with key
    • PSBF: B5 output, flange block shaft according to EN ISO 94
  • Easy mounting of (third-party) motors using the EPH motor adapter
  • Life-long lubrication
  • Surface protection: OS1 to OS4
  • High permitted overhung loads
PS.F series planetary servo gear units
TypeSize
Single-stage/
double-stage
Torque class
Nm
Overhung load range
N
Gear ratios
i
Rotational clearance (single-stage/double-stage)
StandardOptional
Reduced (../R)Minimized (../M)
PS(K)F121 / 122251 900 – 2 000Single-stage1)
32),4,5,7,10

Double-stage1)
16,20,25, 28, 35,40,49,70,100
8' / 10'4' / 6'2' / 3'
221 / 222551 720 – 2 6806' / 8'3' / 4'1' / 2'
321 / 3221104 380 – 5 480
521 / 5223006 150 – 9 610
621 / 62260013 400 – 14 2004' / 6'2' / 3'1' / 1'
721 / 722100025 700 – 35 900
821 / 822175051 400 – 62 800
921 / 922300055 000 – 83 300

1) other ratios on request

2) only for PS(K)F 121 / 521

TypeSize
Single-stage/
double-stage
Torque class
Nm
Overhung load range
N
Gear ratios
i
Rotational clearance (single-stage/double-stage)
StandardOptional
Reduced (../R)Minimized (../M)
PSBF221 / 222551 530 – 5 000Single-stage
5,7,10

Double-stage
152),20, 25, 35,
49,70,100
6' / 8'3' / 4'1' / 2'
321 / 3221108 580 – 25 000
521 / 52230013 900 – 40 000
621 / 62260020 800 – 60 0004' / 6'2' / 3'1' / 1'
721 / 7221 00037 900 – 120 000
821 / 8221 75066 100 – 180 000

1) further ratios on request

2) only for PS(K)F 121 / 521

3) only for PSBF 322 / 522

  • Packaging machines
  • Machine tools
  • Filling and metering units
  • Labeling machines
  • FFS machines
  • Incremental launches
  • Pick & place robots
  • Robot travel axes
  • Flying saw
  • Processing machines
  • Handling gantries
  • Conveyor belts
  • Feed, pivoting and auxiliary axes
  • Travel axes, additional axes
  • Wood processing centers
  • Planetary servo gear units
  • Designed for nominal torques between 30 Nm and 320 Nm
  • Provide the basis for diverse, dynamic, and above all, cost-optimized drive solutions
  • Compact, lightweight design
  • Any mounting position
  • Life-long lubrication
  • Surface protection: OS1 to OS4
  • Available in four output variants:
    • PSC: B5 output, flange, solid shaft
    • PSKC: B5 output, flange, solid shaft with key
    • PSCZ: B14 output, flange, solid shaft
    • PSKCZ: B14 output, flange, solid shaft with key
PS.C series planetary servo gear units
TypeSize
Single-stage/double-stage
Torque class
Nm
Overhung load range
N
Gear ratios
i
Rotational clearance` (single-stage/double-stage)
standard

PS(K)C
PS(K)CZ
221 / 222301 170 – 4 000Single-stage
31),5,7,10



Double-stage
151), 211), 25, 301), 35, 49, 50, 70, 100
10' / 15
321 / 322651 170 – 4 000
521 / 5221602 900 – 6 750
621 / 6223205 390 – 11 000

1) Not for PS(K)C, PS(K)CZ 621 / 622

  • Packaging machines
  • Machine tools
  • Filling and metering units
  • Labeling machines
  • FFS machines
  • Incremental launches
  • Pick & place robots
  • Robot travel axes
  • Flying saw
  • Processing machines
  • Handling gantries
  • Conveyor belts
  • Feed, pivoting and auxiliary axes
  • Travel axes, additional axes
  • Wood processing centers