SEW-EURODRIVE USA

Login
 
You are here: Home >

Low backlash Servo Gear Unit / Servo Gearmotor PSF/PSC/BSF Series

Documentation
  Documentations for: Low backlash Servo Gear Unit / Servo Gearmotor PSF/PSC/BSF Series
Products
The highest level of precision, torque and overhung load: Low backlash planetary and helical-bevel servo gear units


Your advantages


Planetary servo gear units


Low backlash Servo Gear Unit / Servo Gearmotor PSF/PSC/BSF Series
 
PSC series
The low backlash PSC planetary servo gear units are designed for the 30 to 350 Nm (265 to 3100 lb-in) torque classes. They were designed to combine the greatest possible flexibility and cost-efficiency because not every application requires high-performance components.
They provide a basis for diverse, dynamic and cost-optimized drive solutions.
The PSC planetary servo gear units are available in the following versions:
  • PSC = B5 output, smooth output shaft
  • PSKC = B5 output, with keyway
  • PSCZ = B14, output, smooth output shaft
  • PSKCZ = B14 output, with keyway

Technical data
Size
Torque class
[Nm] (lb-in)
Reduction ratios
1-stage [i]1
2-stage [i]2
220
30 (265)
3 / 5 / 7 / 10
15 / 21 / 25 / 30 / 35 / 49 / 50 / 70 / 100
320
65 (575)
520
160 (1410)
620
320 (2830)
5 / 7 / 10
25 / 35 / 49 / 50 / 70 / 100
1) Max. circumferential backlash: 10' for all versions
2) Max. circumferential backlash: 15' for all versions


Low backlash Servo Gear Unit / Servo Gearmotor PSF/PSC/BSF Series
 
PSF series
The low backlash PSF planetary servo gear units are designed for the 25 to 3000 Nm (220 to 26500 lb-in) torque classes. The permitted acceleration torques are significantly higher than these values.
Three output versions are available:
  • PSF: Solid shaft
  • PSKF: Solid shaft with key
  • PSBF: Flange block shaft in accordance with EN ISO 9409

Technical data
Type
Size
Torque class
[Nm] (lb-in)
Reduction ratios1
Circumferential backlash
1-stage [i]
2-stage [i]
1-stage [i]
2-stage [i]
PSF
120
25 (220)
3 / 4 / 5 / 7 / 102
15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 1003
8 / 4 / 2
10 / 6 / 3
PSF / PSBF
220
55 (485)
6 / 3 / 1456
8 / 4 / 2
PSF / PSBF
320
110 (970)
PSF / PSBF
520
300 (2660)
PSF / PSBF
620
600 (5310)
4 / 2 / 1
6 / 3 / 1
PSF / PSBF
720
1000 (8850)
PSF / PSBF
820
1750 (15400)
PSF
920
3000 (26500)
1) Further reduction ratios on request
2) Only PSF
3) Only PSBF 320/520, further reduction ratios on request
4) Standard
5) Reduced
6) Minimized


Helical-bevel servo gear units


Low backlash Servo Gear Unit / Servo Gearmotor PSF/PSC/BSF Series
 
BSF series
The low backlash BSF helical-bevel servo gear units are designed for the 40 to 1500 Nm (350 to 13200 lb-in) torque classes. The permitted acceleration torques are significantly higher than these values.
These right-angle servo gear units are available in five output versions:
  • BSF: Solid shaft
  • BSKF: Solid shaft with key
  • BSBF: Flange block shaft (EN-ISO 9409)
  • BSHF: Hollow shaft with shrink disc
  • BSAF: Hollow shaft with keyway (Shaft mounted gear unit)
All versions are equipped with a B5 mounting flange and optional foot mounting and torque arm. Because of this, these drive units can be optimally integrated into existing applications. The combination of a helical input stage and a hypoid output stage results in ratio ranges which can be covered by the single-stage bevel (wheel) and hypoid gear unit or by the single-stage helical-worm gear unit with high transmission quality. The circumferential backlash remains constantly low throughout the gear unit’s service life.

Technical data
Size
Torque class
[Nm] (lb-in)
Reduction ratios
Circumferential backlash [’]
2-stage [i]
202
40 (350)
3 / 4 / 6 / 8 / 10 / 15 / 20 / 25
6 / 312
302
80 (705)
3 / 4 / 6 / 8 / 10 / 15 / 20 / 25 / 30
402
160 (1410)
502
320 (2830)
3 / 4 / 6 / 8 / 10 / 12 / 15 / 20 / 25 / 30 / 35
602
640 (5660)
3 / 4 / 6 / 8 / 10 / 12 / 15 / 20 / 25 / 30 / 35 / 40
802
1500 (13200)
1) Standard
2) Reduced


Accessories and options for servo gear units and servo gearmotors
Motor adapter

The EPH motor adaptor for planetary servo gear units and EBH motor adaptor for helical-bevel gear units can be used to connect all commercial servomotors in a simple and time-efficient manner to servo gear units from SEW-EURODRIVE.

Reduced backlash

Optional for planetary servo gear units and helical-bevel servo gear units. The circumferential backlash of these gear units is considerably less than that of the standard versions so that positioning tasks can be solved with great precision. The circumferential backlash is specified in angular minutes [ '] in the technical data.

Minimized circumferential backlash

Optional for planetary servo gear units. The circumferential backlash of these gear units is reduced even further than that of the reduced backlash version and therefore allows for even greater precision when performing positioning tasks.

 
back to top