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Introduction
Threaded/Tapered (taper 7, 12degree) chisel/cross bits are mostly used for hand-held rock drill. We make them by alloy steel by forging and select suitable tungsten carbide insert as per customers requests in accordance with their local rock conditions,such as for, limestone, marble, granite etc.
Application
The cross type integral drill steels mainly
apply to drilling the rock with heavy causticity and fissure.
It’s widely used in metallurgy mine, geological exploration, water conservancy construction,
electricity, traffic, tunnel, quarry, national defence stone project etc.
Specification
Drill Type | Bit diameter (D) | Taper | Water hole | Tip Size(mm)
| |
Height*Width | |||||
mm | inch | ||||
Cross Type Bits | 30 | 1 3/16 | 7°11°12° | 3 | 12*12*8 |
32 | 1 1/4 | 7°11°12° | 3 | 12*12*8 | |
34 | 1 11/32 | 7°11°12° | 3 | 12*12*8 | |
36 | 1 27/64 | 7°11°12° | 3 | 13*12*8 | |
38 | 1 1/2 | 7°11°12° | 3 | 14*12*8 | |
40 | 1 37/64 | 7°11°12° | 3 | 15*13*8 | |
42 | 1 21/32 | 7°11°12° | 3 | 15*12*8 | |
50 | 1 31/32 | 7°11°12° | 3 | 19*14*8 | |
60 | 2 3/8 | 7°11°12° | 3 | 22*16*10 | |
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