NQ 76mm hole coring impregnated drill bits for hard rock drilling

The impregnated diamond bitsare the most commonly useful bits in the mineral exploration industry, as they have the widest range of application. The carefully selected grades of high quality synthetic diamond are distributed in the depth of bits’ matrix series. The matrix layer of the crown contains a uniform distribution of crystals that are embedded in a powdered metal bond. The matrix is designed to expose new diamonds to the bits' cutting face as wearing occurs. Fast penetration rate is maintained as a result of this action. The main technical parameters of bits are diamond specifications, like type, size, concentration and grade, as well as matrix hardness type and crown shapes, which are selected according to the hardness and abrasiveness of the formation to be drilled. If user can make rational selections according to the rock formations, then they can get satisfied drilling performance on various formations with different hardness.

NQ core bit vedio

NQ Impregnated Diamond Core Bit W Matrix

Size	NQ	Design	DCDMA
Outer Diameter MAX(mm)	75.44	Outer Diameter MAX(in)	2.970
Outer Diameter MIN(mm)	75.19	Outer Diameter MIN(in)	2.960
Inner Diameter MAX(mm)	47.75	Inner Diameter MAX(in)	1.880
Inner Diameter MIN(mm)	47.50	Inner Diameter MIN(in)	1.870
Hole Diameter(mm)	75.60	Hole Diameter(in)	2.98
Core Diameter(mm)	47.60	Core Diameter(in)	1.88
Hole Area(cm2)	45.00	Hole Area(in2)	6.96
Core Area(cm2)	17.80	Core Area(in2)	2.76

Matrix Height :6mm,8mm,9mm,10mm,12mm,14mm,16mm are available.6mm-8mm (most cost-effective), 8mm-10mm (long service life), 12mm-16mm (super service life)

Bit Crown Profiles: "W" profile, "Flat" profile, "Semi-round" profile, "Cross" profile, "Gear profile"

Waterways: Various waterways are available for diamond impregnated bits. Differing waterways allow for better flushing in various ground conditions and drilling systems.

Threads: standard Q threads as well as thread types required by clients are available

Maxtrix Selection Guide For Impregnated Core Bits

Matrix Hardness	Rock Hardness	Abrasiveness	Rock Type
HRC50	Soft	Medium	Clay, shale, siltstone, cypsum
HRC48~50	Soft	Very high	Ash stone, coal, argillite, volcanics, sandy pebble
HRC45~48	Medium soft	Very high	Sandstone,sandy shale, lithoid limestone, limonite sandstone
HRC40~45	Medium	High	Medium-hard limestone,medium-hard shale, ash stone
HRC38~42	Medium	Medium	Marble, hard schist, hard streak stone
HRC38	Medium hard	Medium	Diabase, andesite, gneiss
HRC35~38	Medium hard	Medium	Grandiorite, Limonite
HRC32~35	Hard	Medium to low	Granite, basalt, hard streak stone
HRC25~30	Hard	Medium to low	Rhyolite, crystauize, guneiss, quartz porphyry
HRC20~25	Extreme hard	Medium to low	Silicious stone, hard sandstone
HRC10~20	Ultra hard	Low	Rhyolite, dense quartzite, iron stone

Siruite Available IMP Bit Sizes

Q Series	AQ, BQ, NQ, HQ, PQ/AQTK, BQTK, BQ3, NQ2, NQ3, NQTT, HQ3, HQTT, PQ3, PQTT
T2 Series	T2 46, T2 56, T2 66, T2 76, T2 86, T2 101
T6 Series	T6 76, T6 86, T6 101, T6 116, T6 131, T6 146, T6S 101, T6S 116
T Series	T36, T46, T56, T66, T76, T86
Z Series	Z46, Z56, Z66, Z76, Z86, Z101, Z116, Z131, Z146
B Series	B36, B46, B56, B66, B76, B86, B101, B116, B131, B146
WF Series	HWF, PWF, SWF, UWF, ZWF
WT Series	RWT, ETW, AWT, BWT, NWT, HWT (Single/Double Tube)
WG Series	EWG, AWG, BWG, NWG, HWG (Single/Double Tube)
WM Series	EWM, AWM, BWM, NWM
Others	NMLC, HMLC, LTK48, LTK60, BGM, NGM, ADBG, TBW, TNW, ATW, BTW, NTW, NXD3, AX, NX, NXC, AXT, T6H, 4 9/16, NWD4, 412F, SK6L146, TT46, TB56, TS116, CHD101.