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available sizes
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From 2 7/8 to 26”
larger sizes for hole opener bit ,reamer bit
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advantage
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most favorable price and best quality
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bearing type
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sealed bearing and non-sealed bearing
HJ(metal sealed journal bearing)
HA (rubber sealed journal bearing
aircooled bearing type
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Formation or layer
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soft,medium soft ,hard, medium hard, very hard formation
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Button size (extra features)
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Button bit,saw teeth
1) Y-Conical teeth 2) X-chisel teeth
3)K- wide teeth
4)G- Gague protection
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Material
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Alloy steel ,carbide
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Packing
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Wooden case or steel case
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Payment terms
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T/T,L/C, Western union
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Delivery terms
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By sea or by air
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Delivery time
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Within 3 to 7 days
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Market
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Canada, USA, Middle east ,Africa, Europe
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Application
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Petroleum & gas ,water well ,mining and tectonic industries ,oil field, construction, geothermal, directional boring, and underground foundation work
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