Working Weight

8,430 lbs

3,820 kg

Recommended Carrier Weight

35 - 57 US tons

31.8 - 51.7 metric tons

The GH18 hydraulic hammer is compatible with excavators in the 35-57 ton range.  Visit the Attachment Wizard to see which hydraulic breakers are compatible with your carrier!



Hydraulic Hammer Service Videos  Hydraulic Hammer Operation Videos  Hydraulic Hammer Photo Galleries  Hydraulic Hammer Publications

Visit and subscribe to NPK's YouTube channel for hydraulic hammer operation and service videos and videos of hydraulic breakers in action!  

Visit NPK's photo website for searchable hydraulic hammer photo galleries!

Visit the Hydraulic Hammer Publications page for sales brochures, operators manuals, and service bulletins.  If you require a service manual or would like a hard copy of any other manual, please contact the Sales Department at 800-225-4379 or email to


Videos de servicio

Visita y suscríbete al canal de YouTube de NPK para videos de instrucciones de servicio para martillos hidráulicos.

NPK AUTOLUBE SYSTEMS are designed to automatically provide a supply of grease to the hammer tool bushing - increasing tool bushing life by reducing tool bushing wear.  NPK offers both carrier mounted and hammer mounted options.  Due to its compact design, the hammer mounted autolube system can be installed directly onto the hammer. This design ensures that the autolube system is always with the hammer, great when sharing a hammer between several carriers.


Autolube Publications

Visit the Autolube Publications page for
sales brochures and operators manuals.


Find a Dealer

Impact Energy Class 12,000 ft lbs
Impact Frequency 300 - 400 bpm
Oil Flow 58 - 77 gpm 220 - 290 lpm
Operating Pressure 2,500 psi 172 bar
Tool Diameter 6.5 in 165 mm
Tool Working Length 29 in 740 mm