Proline Internal Pneumatic Wedge Type Mandrels

Proline’s Pneumatic Mandrels used with Proline’s Bending Machines are vital pieces of equipment for any pipe bending operation. The Pneumatic Pipe Mandrel Equipment is a wedge style bending mandrel for the internal support of 8″ to 48” (219-1219 mm) diameter steel pipe of any grade and wall thickness.

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Our unique wedge design with our large capacity cylinders allows smooth bends to be created by the operator while preventing pipe buckling and shape distortion.

Using the latest technologies and materials, Proline mandrels are guaranteed to withstand the extreme forces of the bending process. Proline’s self-centering / no-roll technology ensures that the mandrel will always stay centered in the pipe.

Proline can design and manufacture to custom sizes and specifications.   


  • Designed and engineered for a one-man operation.
  • Pneumatically air driven mandrels from 12” and larger.
  • Extremely powerful large diameter cylinders.
  • Fast Action – retracts, expands and travels quickly.
  • Polyurethane-coated backing bars, pads and wheels for the protection of internal coated pipes.
  • Conversion kits available to accommodate wall thickness ranges from X65 to X80+ grade pipe.
  • Rugged and built for long life.
  • Very low maintenance.

Our manual controlled mandrels come with 100 feet (30.48 M) of reach rod, control ends and spare parts for simple set up and repairs.

Remote-Control Mandrels 16” and up come with a remote system that consists of a remote receiver and a remote transmitter. These remote mandrels come with a battery pack, charger, spare receiver/transmitter, 100 feet (30.48 M) of reach rod, control ends, and spare parts for simple set up and repairs.

Mandrel Operations Manuals Upon Request.