Choosing Drill Steel and Rock Drill Bits - Crowder SupplyExplore further
However, it was made for production mining and is limited in scope. The drill steels normal shank configuration is 7/8 x 4 ¼ and the range of bits is limited. Crowder Supply stocks shallow cross bits from 1' through 2', button bits 1 3/8 – 1 1/2 'and 11 degree steel in 18' through 12' increments. Failure to maintain steady down ...
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