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  Standard Gearmotors sew eurodrives
 
Servo gear units

The highest level of precision, torque and overhung load: Low backlash planetary and helical-bevel servo gear units


Your advantages

  • Compact, lightweight design
  • Highest permitted torques and overhung loads
  • High efficiency levels
  • Highest level of reliability, availability and durability
  • Adaptor is eliminated, which cuts costs

Planetary servo gear units



PSC series
The low backlash PSC planetary servo gear units are designed for the 30 to 305 Nm 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]
Reduction ratios
1-stage [i]1
2-stage [i]2
220
30
3 / 5 / 7 / 10
15 / 21 / 25 / 30 / 35 / 49 / 50 / 70 / 100
320
65
520
160
620
320
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



PSF series
The low backlash PSF planetary servo gear units are designed for the 25 to 3000 Nm 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]
Reduction ratios 1
Circumferential backlash
1-stage [i]
2-stage [i]
1-stage [i]
2-stage [i]
PSF
120
25
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
6 / 3 / 1456
8 / 4 / 2
PSF / PSBF
320
110
PSF / PSBF
520
300
PSF / PSBF
620
600
4 / 2 / 1
6 / 3 / 1
PSF / PSBF
720
1000
PSF / PSBF
820
1750
PSF
920
3000
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



BSF series
The low backlash BSF helical-bevel servo gear units are designed for the 40 to 1500 Nm 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]
Reduction ratios
Circumferential backlash [’]
2-stage [i]
202
40
3 / 4 / 6 / 8 / 10 / 15 / 20 / 25
6 / 312
302
80
3 / 4 / 6 / 8 / 10 / 15 / 20 / 25 / 30
402
160
502
320
3 / 4 / 6 / 8 / 10 / 12 / 15 / 20 / 25 / 30 / 35
602
640
3 / 4 / 6 / 8 / 10 / 12 / 15 / 20 / 25 / 30 / 35 / 40
802
1500
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.

PSC series planetary gear units
Thanks to its high degree of flexibility and variability, the PSC gear unit series offers economic solutions for many applications. Combined with drive electronics from SEW-EURODRIVE, they provide customized, cost-optimized drive solutions that ensure a high level of process reliability in system operation. The variability in the tried and tested modular system allows for simple integration into existing automation systems.




PSC series overview

  • 4 sizes
  • Choice of 2 output flanges (B5 or B14)
  • Torque range of 30 to 350 Nm (270 to 3100 in-lb)
  • Very high power density thanks to direct motor mounting
  • Large variety of reduction ratios
  • Flexible motor mounting thanks to new adapter concept
  • Reliability thanks to application-specific lubrication: Oil / grease
  • Operation independent of mounting position
  • Exterior surface protection OS1 to OS4 optional

May be used wherever varied or reduced machine performance requires adjustable drive engineering. Cost-effectiveness is the key criterion.
 
Reduced backlash vertical gear units / gearmotors
Helical gear units, parallel shaft helical gear units, and helical-bevel gear units with reduced backlash can be supplied in all configuration types and for all mounting positions of standard SEW gear units from size 7 upward.

SEW gearmotors with reduced backlash gear units are available as planetary, helical, parallel shaft, and helical-bevel gearmotors in many application-oriented mounting positions.

They stand out because of their high level of efficiency and high-endurance gearing. They are designed as both asynchronous and permanent-field synchronous motors, and are operated with MOVIDRIVE® drive inverters or MOVIDYN® servo controllers.



Technical data

Helical gear unit R
Ratios
 
3.21 ... 289.74
Output torque A
[Nm]
50 ... 18,000
Circumferential backlash
[I]
4.96 ... 13.7


Parallel shaft helical gear unit F
Ratios
 
3.77 ... 281.71
Output torque A
[Nm]
105 ... 18,000
Circumferential backlash
[I]
4.3 ... 11.87


Helical-bevel gear unit K
Ratios
 
5.36 ... 197.37
Output torque A
[Nm]
140 ... 50,000
Circumferential backlash
[I]
3.79 ... 13.19
 
  SEW EURODRIVE GEARBOXES


 
 
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