4" DTH Hammer
RH40 - Uses 340 Shank DTH Bit

Designed for drilling 4" and larger holes.

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.