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OUR PQ HQ NQ BQ IMPEGNATED DIAMOND CORE BITS ARE THE MOST DEPENDABLE DIAMOND CORE BITS IN CORE DRILLING PERFORMANC - details see: https://www.machineto.com/bq-nq-hq-pq-impregnated-diamond-core-bit-10317367

Features of Changtan Drill Impregnated Diamond Core Bits

Many years of experience combined with recent improvements in technology and manufacturing concepts have resulted in greatly improved drilling performance of impregnated PQ HQ NQ BQ diamond core bits.

High quality synthetic diamond powders are distributed in the depth of impregnated diamond core bit's matrix series. The matrix layer of the crown contains a uniform distribution of these crystals that are embedded in a powdered metal bond.

The matrix of our impregnated diamond core bits is designed to expose new diamonds to the bits' cutting face as wear occurs. Fast penetration rate is maintained as a result of this action.

Our impregnated diamond core bits are manufactured to give optimum penetration rates and bit life, which is required to keep the cost of diamond drilling to a minimum.

Core Barrel Designation	Core Bit				Core Bit				Reaming Shell
	Outside Set Diameter				Inside Set Diameter				Set Diameter
	Maximum		Minimum		Maximum		Minimum		Maximum		Minimum
	Inches	mm	Inches	mm	Inches	mm	Inches	mm	Inches	mm	Inches	mm
NQ	2.97	75,44	2.96	75.19	1.88	47.75	1.87	47.5	2.985	75.82	2.975	75.57
HQ	3.77	95.76	3.755	95.38	2.505	63.63	2.495	63.38	3.79	96.27	3.775	95.89
PQ	4.815	122.3	4.795	121.8	3.35	85.09	3.34	84.84	4.835	120.81	4.82	122.43
BQ	2.35	59.69	2.34	59.44	1.438	36.52	1.428	36.27	2.365	60.07	2.355	59.82
AQ	1.88	47.75	1.87	47.5	1.067	27.1	1.057	26.85	1.895	48.13	1.885	47.88