mining drill bits NQ HQ PQ step type Surface Set Diamond Core Bits is independently packed in a small carton; outer packed in larger caton..
within 10 workdays after your payment
Surface Set Diamond Core Bit
This type of bit is primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bit. It is also recommended for use in drilling harder formations where the available rotary speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.
In most cases, surface set diamond bits will provide higher rates of penetration than in softer formations due largely to the greater degree of exposure of the individual diamond crystals.
PQ, HQ, NQ, BQ, AQ
T2-46, T2-56, T2-66, T2-76, T2-86, T2-101
And all the other international standard CDDA, DCDMA, Crealius and ISO sizes, etc.