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Pneumatic O-Ring Grippers

PM 4 and 6-Finger

PM are innovative multi-finger grippers for handling and assembling O-rings.


  • They are specifically designed with an independent device which expands the gasket and another which subsequently ejects it for assembling.
  • Ability to assemble particularly thick gaskets and to position them in seats which are located at a distance from the ends of the housing.
  • Adjustable stroke suitable for different O-ring sizes.
  • Robust lightweight housing made of hard-coated aluminum alloy.
Datasheet3D DrawingModelNr. of fingers/jawsGrippingStroke per jawEjector strokeForce per jaw
@6 bar
Ejector forceWeightRepeat accuracy
PM064external1.85-5mm5 mm158 N570 N1 kg± 0.05 mm
PM06-36external1.75-8mm7.5 mm158 N570 N1.3 kg± 0.05 mm
PM06-46external8mm7.5 mm158 N570 N1.2 kg± 0.05 mm
PMIE66internal and
“A” fingers 17.0 mm
“B” fingers 13.5 mm
5 mm“A” fingers 31.6 mm
“B” fingers 50.0 mm
“A” down 200 N
“A” up 385 N
1.95 kg± 0.05 mm

Operating pressure 4 – 8 bar
Ambient temperature 5-60°C
Sound emissions (sound pressure) ≤ 70 db (A) in each direction

The dimensions are indicative and susceptible to changes due to technical improvements. We reserve the right to make changes without notice.