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      Name：Big Size Bits
    Input Date：2025-5-22 8:50:44
    Big Size Bits Using in Water Wells, Oil, Gas and Construction Drilling.

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    • Big Size Bits
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    Big Size Bits Using in Water Wells, Oil, Gas and Construction Drilling.

     

     

    Drill Bit Bit Dia. (mm) Air Holes No. Gauge Buttons Front Buttons
    HD275
    		 311 3 15*Φ18 36*Φ16
    334 3 18*Φ19 44*Φ18
    356 3 18*Φ19 48*Φ18
    368 3 20*Φ19 50*Φ18
    381 4 20*Φ19 54*Φ19
    HD330
    		 381 4 20*Φ19 54*Φ18
    406 4 20*Φ19 58*Φ18
    431 4 20*Φ19 64*Φ18
    445 4 24*Φ20 72*Φ18
    470 4 24*Φ20 80*Φ18
    HD475
    		 495 4 24*Φ20 88*Φ18
    525 4 24*Φ20 100*Φ18
    580 4 24*Φ20 116*Φ18
    660 4 28*Φ20 140*Φ19
    680 4 28*Φ20 144*Φ19
    HD525
    		 711 4 28*Φ20 154*Φ19
    762 4 32*Φ20 172*Φ19
    780 4 32*Φ20 180*Φ19
    825 4 36*Φ20 216*Φ19
    998 4 40*Φ20 348*Φ19

     
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