pdc coring bit 1.Type:coring bit,diamond 2.OD:28mm-150mm 3.long useful life, ... range, PDC bit can be divided to core bit, non-coring drilling bit and anchor bit. This kind of bit has ... -75, φ89,φ94, φ108, φ115, φ120, φ133, φ146, φ153 pdc coring bit