Pjr Dynabloc

Backlash from 2 to 7 arcmin (Low backlash MEDIUM/EXPERT)
Ratios from 3 to 70 (one or two stages)

Pjr Dynabloc is a range of high-performance geared servo motors for applications requiring reduced backlash.

The planetary gearbox provides very low backlash and very high torsional stiffness. This guarantees motor stability even at dynamic operation with high inertia loads. Pjr Dynabloc also has a high overload capacity making it suitable for the most demanding applications. Lightweight and compact, the geared servo can be easily integrated into machines.

The Pjr Dynabloc range can be fitted with Unimotor hd or fm servo motors depending on the required application:

Unimotor hd – designed for pulse duty applications requiring high dynamics
Unimotor fm – ideal for continuous duty applications with high inertia loads


  • Very low backlash
  • Very High torsional stiffness
  • High overload capacity
  • Motor speeds up to 6000 rpm
  • High inertia option available with fm motor
  • Lightweight and compact for easy integration into machines
  • Multiple shafts and mounting positions for easy integration into machines
  • Maintenance free
  • Lubricated for life​
  • Multipositional

Main Characteristics

Rated torqueN.m26 to 600
Max acceleration torqueN.mUp to 1300
Gearbox ratio1 stage: 3 to 10 2 stage: 12 to 70
BacklasharcminMEDIUM: 1 stage: 4 to 6 2 stage: 12 to 70 EXPERT: 1 stage: 2 to 4 2 stage: 4 to 5
MotorUnimotor hd or Unimotor fm
Motor speedrpm3000 or 6000
Efficiency%1 stage: 96 2 stage: 94
Output shaftSolid shaft with key
MountingFlange with tapped holes (B14)