Boulder Busters
Hardened tough nose, bull point boulder busters are attached to drill rod and driven by a drive weight and cathead hoist. Boulder busters are used to break up boulders that lie ahead of the    casing. Boulders may more easily shatter if a hole is drilled through the boulder prior to driving.
 

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Boulder Busters
Size Part Number
Rod
Conn.
Used in
Drive Pipe
 Weight
inches mm. lbs. kg.
1-7/8 47.6 566110453 AW 2 in. (AW) 3.5 1.6
2-1/8 53.9 566110587-1 AW 2-1/2 in. (BW) 6.0 2.7
2-5/8 66.7 566110588-1 AW 3 in. (NW) 8.0 3.6
3-5/8 92.1 566110589-2 NW 4 in. (HW) 17.0 7.7
5-5/8 142.9 566110590-1 NW 6 in. (SW) 17.0 7.7
 
Cross Chopping Bits
Cross chopping bits are used to clear the way when driving casing into coarse gravel, small boulders, etc. They are also useful for cleaning out holes drilled in rock.
 

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Cross Chopping Bits
Bit Face Width Part Number
Rod
Conn.
Used in
Drive Pipe
 Weight
inches mm. lbs. kg.
1-7/8 47.6 566110578-3 AW 2 in. (AW) 2.5 1.1
2-1/8 53.9 566110579-1 AW 2-1/2 in. (BW) 3.0 1.4
2-5/8 66.7 566110580-1 AW 3 in. (NW) 10.5 4.8
2-5/8 66.7 566110580-5 BW 3 in. (NW) 7.5 3.4
3-5/8 92.1 566110581-4 AW 4 in. (HW) 16.0 7.3
3-5/8 92.1 566110581-2 NW 4 in. (HW) 13.0 5.9
Straight Chopping Bits
This type chopping bit is used to clean out material that has accumulated inside the casing. Water is pumped through the drill rods and out the ports in the bit to flush the material from the casing.
 
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Straight Chopping Bits
Bit Face Width Part Number
Rod
Conn.
Used in
Drive Pipe
 Weight
inches mm. lbs. kg.
1-7/8 47.6 566110562-3 AW 2 in. (AW) 2.5 1.1
2-1/8 53.9 566110563-1 AW 2-1/2 in. (BW) 3.0 1.4
2-5/8 66.7 566110564-1 AW 3 in. (NW) 10.5 4.8
3-5/8 92.1 566110565-5 AW 4 in. (HW) 16.0 7.3
3-5/8 92.1 566110565-2 NW 4 in. (HW) 13.0 5.9

DRILLERS SERVICE, INC.                   HICKORY, NC USA                  800-334-2308,  EXT. 230

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