Bulroc BR3 and BR33 DTH Valved Hammers

Valved-Type Hammer - BR3 (3.35" to 3.74") and BR33 (3.54" to 3.94") diameter holes

The BR3 and BR33 are both valved-type hammers designed for high performance at low operating air pressures. Simplicity of design, ease of service, and low air consumption are all factors that combine to make these hammers robust and reliable drilling tools. Both hammers are available as standard witha 2 3/8" API regular pin.

The BR3 and BR33 hammers both incorporate a positive fitting check valve to guard against the ingress of ground water debris when the air is shut off.

Technical Specifications

		Component Parts
		Ref.	Description
		1	Wearsleeve
		2	Inner Cylinder
		3	Bearing
		4	Piston
		5	Air Metering Plug
		6	Beveled Valve Housing
		7	Centralizer
		8	Disc Valve
		9	Valve Chest
		10	Backhead
		11	Backhead 'O' Ring
		12	Bit Retaining Ring
		13	Backhead Spacer
		14	Chuck
		15	Chuck Seal
		16	Check Valve
		17	Spring
		18	Split Spacer
		Button Bits
		Bit Diameter	BR3	BR33
		3.35"	X
		3.54"	X	X
		3.74"	X	X
		3.94"		X

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