Rock Hog Drilling Products, A worldwide leader of manufacturing DTH Hammers and DTH Bits
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4" DTH Hammer
RH40 - Uses 340 Shank DTH Bit

Designed for drilling 4" and larger holes.
Picture

Features

- Wearsleeve is reversible.    
- The piston is the only moving part making this hammer very reliable.
- All external parts are hardened to resist wear.
- Designed for maximum penetration while using minimal fuel consumption.
- Still utilizes long proven piston design.
- All parts are made from US Certified Steel.


Download RH40 Hammer Manual.
Value
English
Metric
Outside Diameter
3.63 inch
92.2 mm
Overall Length   (without bit)
43.6 inch
1107 mm
Operating Length   (API shoulder to bit face)
43.7 inch
1110 mm
Total Weight
86 lbs
38 kg
Bore Size
2.95 inch
75 mm
Piston Weight
19 lbs
8.5 kg
Drillpipe Connection *
2 3/8 Reg API pin up
2 3/8 Reg API pin up
Wrench Flats
3 inch
76 mm
Hole Size Range
4 inch - 5 inch
102 mm - 127 mm
Bit Shank 
340
340
Min Air Volume Required **
150 cfm
4.5 cmm
Max Operating Pressure
500 psi
34 bar
* Other connections available upon request
** Hammer will run on less volume but penetration rates will be       significantly slower.
Picture
An ISO 9001: 2015 Certified Company
  • Home
  • DTH Hammers
    • 3.5" Model
    • 4" Model
    • 4.5" Model
    • 4" Reverse Circulation Models
    • 5" Model
    • 5" Reverse Circulation Models
    • 5.5" Model
    • 6" Model
    • 6.5" Models
    • 8" Models
    • Technical Info
  • DTH Bits
    • Bit Shank Styles
    • Bit Face Styles
    • Head Sizes
    • Button Styles
    • Carbo Bits
    • Technical Info
  • Drillpipe
  • Special Promotions
  • Distribution
  • About Us
  • Contact Us
  • Downloads