WPI CMD
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A better design that combines efficiency, reliability and serviceability.

Excellent power-to-weight ratio
Unique gas-charged piston maximizes hydraulic hammer efficiency
Simple, two-moving-parts design for reliability
Separate ports for the NPK Autolube (auto greasing) system and an airline for underwater use
Bottom tie rod nuts for easier serviceability (GH Models)
Quick-change tool system with single round retainer pin
Variety of tool configurations available
Replaceable cylinder sleeves for easy, economical rebuild
Anti-blank fire feature virtually eliminates dry firing for long hydraulic breaker life

PH06

Working Weight 220 lbs
Engine Frequency 480 – 1,200 bpm
Impact Energy Class 150 ft lbs
Tool Diameter 1.7 in
Tool Length 11.8 in

PH07

Working Weight 265 lbs
Engine Frequency 450 – 1,300 bpm
Impact Energy Class 200 ft lbs
Tool Diameter 1.9 in
Tool Length 12.5 in

PH1

Working Weight 423 lbs
Engine Frequency 550 – 1,100 bpm
Impact Energy Class 350 ft lbs
Tool Diameter 2.2 in
Tool Length 14.1 in

PH2

Working Weight 487 lbs
Engine Frequency 500 – 1,200 bpm
Impact Energy Class 500 ft lbs
Tool Diameter 2.6 in
Tool Length 16.2 in

PH3

Working Weight 825 lbs
Engine Frequency 500 – 1,150 bpm
Impact Energy Class 750 ft lbs
Tool Diameter 3 in
Tool Length 16.5 in

PH4

Working Weight 1,064 lbs
Engine Frequency 400 – 1,000 bpm
Impact Energy Class 1,300 ft lbs
Tool Diameter 3.4 in
Tool Length 18.5 in

NPK GH40 In Action

GH6

Working Weight 235 lbs
Engine Frequency 480-1,200 bpm
Impact Energy Class 150 ft lbs
Tool Diameter 1.7 in
Tool Length 12.2

GH9

Working Weight 3,840 lbs
Engine Frequency 500 – 670 bpm
Impact Energy Class 3,000 ft lbs
Tool Diameter 5 in
Tool Length 24 in

GH10

Working Weight 4,340 lbs
Engine Frequency 400 – 550 bpm
Impact Energy Class 4,000 ft lbs
Tool Diameter 5.4 in
Tool Length 24.5 in

GH12

Working Weight 5,940 lbs
Engine Frequency 380 – 480 bpm
Impact Energy Class 5,500 ft lbs
Tool Diameter 5.7 in
Tool Length 25.5 in

GH15

Working Weight 7,110 lbs
Engine Frequency 320 – 400 bpm
Impact Energy Class 8,000 ft lbs
Tool Diameter 6.1 in
Tool Length 27 in

GH18

Working Weight 12,000 ft lbs
Engine Frequency 300 – 400 bpm
Impact Energy Class 8,430 lbs
Tool Diameter 6.5 in
Tool Length 29 in

GH23

Working Weight 9,240 lbs
Engine Frequency 300 – 400 bpm
Impact Energy Class 13,500 ft lbs
Tool Diameter 6.9 in
Tool Length 34.6 in

GH30

Working Weight 13,500 lbs
Engine Frequency 310 – 390 bpm
Impact Energy Class 15,000 ft lbs
Tool Diameter 7.2 in
Tool Length 32 in

GH40

Working Weight 17,000 lbs
Engine Frequency 240 – 330 bpm
Impact Energy Class 17,000 ft lbs
Tool Diameter 8 in
Tool Length 35.4 in

GH50

Working Weight 24,910 lbs
Engine Frequency 210 – 280 bpm
Impact Energy Class 20,000 ft lbs
Tool Diameter 8.4 in
Tool Length 39.7 in

Financial Solutions

When purchasing equipment you will have many decisions to make. Choosing a lender and how to finance are some of the most important ones. WPI can offer you exclusive benefits to support your equipment purchase.

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