H120GC S

Reliable and Durable Design

  • Cat� Hammers use up to 25 percent less fuel and are up to 27 percent more efficient.
  • The standard silencing feature, indicated by the �S� in the nomenclature, protects your operator and everyone near the jobsite.
  • It also allows you to work on jobsites where noise is regulated.
  • The power cell is protected by the fully enclosed housing.
  • The housing also prevents dust and debris from entering the bushing.
  • Enjoy fast service times and lower owning and operating costs with the simplified design.
  • Choose between top and side mount options to match your application.
  • Achieve consistent power and production over time with the gas fired design.
  • Cat Hammers are designed to work with our machines as a total solution and provide seamless hydraulic connectivity for maximum performance.
  • The Cat buffering system reduces vibration to the machine, improves noise suppression, and improved hammer durability.
  • Easy to Maintain

  • Achieve up to 18 percent lower maintenance costs with Cat� Hammers.
  • Easy and quick access to maintenance areas ensures the hammer always operates at its peak.
  • Spend more time working and less time on service.
  • Greasing can be performed quickly from one standing-height grease point.
  • Service the lower bushing in the field using simple hand tools.
  • Verify the gas charge of the hammer without removing it from your machine.
  • With the standard auto-lube system, your hammer is greased while it runs � saving you time and protecting your investment.
  • Easy to Operate

  • Protect against blank firing with automatic shut off.
  • This feature helps prevent damage to your machine and premature damage to your hammer by detecting when the hammer is not in contact with material.
  • Operator feel, and control is improved with an interlocking quad wear system which guides and supports the front head.
  • Select between high blow frequency and maximum power to get the performance you need to suit your application.
  • Easily adjust the piston stroke between long and short stroke positions to match application requirements.
  • You Are Supported

  • Go where the job takes you. The Cat Dealer Network is there to help when you need it.
  • Rely on Caterpillar for complete system support. Receive parts, service, and technical assistance for your machine, hammer, and hydraulics from a single source.
  • Select Units


    Cat® Hammers make short work of your demolition, construction, and quarry needs. Combine the simple, lightweight design of the GC S Hammer series with the reliability, durability, and value you expect from Cat products. The result is a low cost per hour solution providing the consistent power and performance you need.

    • Impact Energy Class 2950.0 ft-lb 4.0 J
    • Energy Class 16.0 kPa 2950.0 ft·lbf
    • Blows per Minute 400-800 400-800
    • Operating Pressure NaN
    • Maximum Operating Weight 3927.0 lb 1785.0 kg
    • Maximum Rated Flow 1785.0 kg
    • Operating Weight - With Tool 3927.0 lb 25.0 kg
    • Minimum Operating Weight 3859.0 lb 1754.0 kg
    • Minimum Rated Flow 40.0 gal/min 3859.0 lb
    • Operating Weight 1754.0 kg 151.0 l/min
    • Maximum Carrier Weight 55.115 lb 25.0 t
    • Minimum Carrier Weight 39.683 lb 18.0 t
    • Overall Height 39.683 lb 33.0 gal/min
    • Tool Shaft Diameter -5.31 in 135.0 mm
    • Overall Length 135.0 mm
    • Maximum Operating Pressure 2.61 psi 18.0 kPa
    • Minimum Operating Pressure 2.32 psi 16.0 kPa
    • Rated Flow - Maximum 40.0 gal/min 151.0 l/min
    • Rated Flow - Minimum 33.0 gal/min 125.0 l/min
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