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wholesale steel tooth bit from us, we always have cheap products to offer you.
Method of operation
1 measurements of good size, matching the corresponding joint.
2 well check each bit roller flexibility, loose or not, connection of drilling tools.
3 to the bottom, the rotating disk, to be smooth, then slowly down, all the sand flushing as well.
Gradually add pressure to 4 bit, the intensity should not be too large, otherwise the bit may lead to deformation or wheel
fall off slowly.
5 drilling speed must be just perfect, drilling cement fifty to seventy drill more appropriate.
http://www.pdcoiltool.com
