Bulroc BR1 and BR2 DTH Valved HammersValved-Type Hammer - BR1 (2.36" to 2.52") and BR2 (2.76" to 3.15") diameter holesThe BR1 and BR2 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 with box backheads, RD40 for the BR1 and RD50 for the BR2. However, alternative backhead options are available on request. The BR1 and BR2 hammers both incorporate a positive fitting check valve to guard against the ingress of ground water debris when the air is shut off. |
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Component Parts |
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Ref. |
Description |
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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 Sealing Ring | |||
16 |
Check Valve | |||
17 |
Check Valve Spring | |||
18 |
Split Spacer | |||
Button Bits |
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Bit Diameter |
BR1 |
BR2 |
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2.36" |
X |
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2.52" |
X |
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2.76" |
X |
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2.99" |
X |
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3.15" |
X |
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