Bulroc Hyper 121 DTH Hammer

Hyper 121 Valveless Hammer - 11 7/8" to 17 1/2" diameter holes

The Bulroc Hyper 121 Hammer is designed to operate over a wide range of operating air pressures. A 6 5/8" API regular pin backhead is supplied as standard. The Hyper 121 is fitted with a positive seating water check valve and is supplied as standard fitted with a solid choke.

In addition to the standard Hyper 121 Button Bit, the hammer can easily be modified to accept Button Bits with Mission SD12 and Ingersoll Rand DHD112 shank designs by simply replacing the chuck, retainers, bit bearing, and piston.

Technical Specifications

		Component Parts
		Ref.	Description
		1	Backhead 6 5/8" Regular Pin
		2	Backhead / Chuck 'O' Ring
		3	Check Valve
		4	Check Valve Spring
		5	Diverter
		6	Compression Buffer
		7	Tube Holder
		8	Control Tube Buffers (2)
		9	Control Tube 'O' Ring
		10	Control Tube
		11	Piston
		12	Wearsleeve
		13	Piston Retaining Rings (2)
		14	Bearing Guide Bush
		15	Bit Bearing
		16	Bit Retainer (pair)
		17	Bit Retainer 'O' Ring
		18	Chuck
		19	Chuck Bearing
		20	Chuck Breakout Washer
		21	Backhead Breakout Washer
		Hammer Specifications
		Weight (less bit)	1487 lbs.
		Length (less bit)	74.39"
		Outside diameter	10.7"
		Bore diameter	8.5"
		Piston weight	275 lbs.
		Stroke	5"
		Air Consumption
		PSI	CFM
		100	592
		150	1087
		200	1674
		250	2338

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