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OTC 4107A 25-Ton Single-Acting Spring-Return Ram

OTC 4107A 25-Ton Single-Acting Spring-Return Ram

4107A design ensures positive, leak-resistant sealing throughout all pressure ranges, yet full piston return characteristics are maintained.

Additional bearing surface has been designed into these units to effectively resist the punishing stress exerted by off-center loads.

Depending on capacity, this ram can handle a variety of bending and straightening jobs, construction maintenance applications, pressing operations, body and frame straightening, and rear housing and axle correction.


  • Capacity in tons: 25
  • Stroke: 14 1/4 inch
  • Oil capacity: 73.5 cubic inch
  • Effective ram area: 5.157 square inch
  • Tons at 10,000 PSI: 25.8
  • Spring return
  • Height collapsed: 21 3/8 inch
  • Height extended: 35 5/8 inch
  • Piston Protrusion at collapsed height: 1 7/8 inch
  • Piston thread: 2 inches NPT
  • No collar thread, Straight: 3 5/16 inches-12
  • Internal base thread NPSM: 2 inches-11 1/2

Manufacturer: SPX/Bosch (OTC Rotunda Kent-Moore Miller)

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