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| Categories | milling bits | 
|---|---|
| Place of Origin: | China | 
| Brand Name: | EST | 
| Certification: | ISO9001 | 
| Model Number: | All types | 
| MOQ: | 10pces | 
| Price: | USD$10-USD$50/pces FOBQingdao | 
| Packaging Details: | wooden case/ carton | 
| Delivery Time: | 10-15days | 
| Payment Terms: | TT, L/C | 
| Supply Ability: | 100000pces per month | 
Product discription:
Rock drill bits are used to mine and construction.
Button bit:
Head 45/48/51/57/64/70/76/89/102/115with thread R25/32/38/45/51
Chisel bit: Head32/34/36/38/40/42/43/44/46with socket22/24/25and
the taper 12o/6o/7o
Cross bit:
Head 32/34/36/38/40/43/44/46with socket22/24/25and the
taper12o/6o/7o
Retrac bit:
Head 51/64/76/89/102with thread R32/38, T38/45/51
Coal bit:
Head 28/42/44
The chisel bit is made from grade hard alloy and special steel, generally matched with the light-duty rock drill, to drill the rock hole within diameter of 50mm.
Type to choose
| Drill Type | Bit diamater (D) | Taper | Whter hole | (d) mm | Part on | |
| mm | in | |||||
| 
 | 30 | 1 3/16" | 7° | 2 | 22 | Y130-722 | 
| 32 | 1 17/64" | 7° | 2 | 22 | Y132-722 | |
| 34 | 1 11/32" | 7° | 2 | 22 | Y134-722 | |
| 36 | 1 27/64" | 7° | 2 | 22 | Y136-722 | |
| 38 | 1 1/2" | 7° | 2 | 22 | Y138-722 | |
| 40 | 1 37/64" | 7° | 2 | 22 | Y140-722 | |
| 42 | 1 21/32" | 7° | 2 | 22 | Y142-722 | |
| 43 | 1 11/16" | 7° | 2 | 22 | Y143-722 | |
| 44 | 1 47/64" | 7° | 2 | 22 | Y144-722 | |
| 46 | 1 13/16" | 7° | 2 | |||
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