Condition:	New	Processing Type	Forging
Applicable Industries:	Energy & Mining, Underground Drilling And Surface Drilling	Use	Ore Mining, quarry,mining,blasting,construction,open bit etc.
Video outgoing-inspection	Provided	Quality	100% quality similarity world top class brands
Machinery Test Report	Provided	Advantages	high quality and factory prices
Marketing Type	Ordinary Product	Boby type	Normal type or retrac type
Brand Name	JCDRILL	Thread	R25, R28, R32, R3212 R35, R38, T38, T45, T51, ST58, GT60, GT68
Type	Thread Button Bit	Tungsten carbide	Spherical, ballistic,Conical,Hemispherical
Machine Type	Drilling Tool	Fact type	Drop Center, Flat Face, Convex, Concave, etc
Material	Carbon steel

R28
Drill Bit	Bit Dia.		NO x Button x Dia.			Flushing Hole		Weight
	mm	inch	Front	Gauge	Angle	Front	Side	（KG）
	Spherical Buttons
	37	1 29/64	2x7	5x9	30°	1	1	0.5
	38	1 1/2	2x8	4x9	30°	1	2	0.6
	38	1 1/2	2x7	5x9	30°	1	1	0.6
	41	1 5/8	2x8	5x9	35°	1	1	0.7
	43	1 2/3	2x9	5x9	30°	1	2	0.8
	45	1 3/4	2x9	5x10	30°	1	2	0.9
	45	1 3/4	3x8	6x9	30°	1	3	0.9
	Parabolic Buttons
	37	1 4/9	2x7	5x9	30°	1	1	0.5
	38	1 1/2	2x8	4x9	30°	1	2	0.6
	38	1 1/2	2x7	5x9	30°	1	1	0.6
	41	1 5/8	2x8	5x9	35°	1	1	0.7
	43	1 2/3	2x9	5x9	35°	1	2	0.8
	45	1 3/4	2x9	5x10	30°	1	2	0.9
	45	1 3/4	3x8	6x9	35°	1	3	0.9
	48	1 7/8	2x9	5x11	30°	1	2	1.0
	48	1 7/8	3x8	6x9	35°	1	3	1.0
	38	1 1/2	14x8			1	2	0.6
	41	1 5/8	14x8			1	4	0.7
	43	1 2/3	14x8			1	4	0.7
	45	1 3/4	14x8			1	4	0.9
	51	2	14x8			1	4	1.1
Drill Roll				Bit Dia.		Dimaeter		Weight
				mm	inch	mm	inch	（KG）
				2400	7'10"	28	1 1/8	12.2
				2750	9'	28	1 1/8	14.4
				3700	12'11/2"	28	1 1/8	18.9
				4000	13'1/8"	28	1 1/8	20.4
				4310	14'11/2"	28	1 1/8	22.0
				4920	16'11/2"	28	1 1/8	25.3
				2900	9'61/8"	32	1 1/4	18.8
				3090	10'11/2"	32	1 1/4	20.0
				3700	12'11/2"	32	1 1/4	24.0
				4310	14'11/2"	32	1 1/4	27.9
				3090	10'11/2"	32	1 1/4	20.0
				3700	12'11/2"	32	1 1/4	23.5
				3090	10'11/2"	32	1 1/4	20.0
				3700	12'11/2"	32	1 1/4	24.0
				4000	13'13/8"	32	1 1/4	25.9
				4310	14'11/2"	32	1 1/4	27.9
				3050	10'	28	1 1/8	15.0
				3050	10'	28	1 1/8	15.0
Coupling				Bit Dia.		Dimaeter		Weight
				mm	inch	mm	inch	（KG）
				150	5 7/8	44	1 3/4	1.0
				150	5 7/8	40	1 37/64	0.9
				170	6 3/4	55	2 5/32	2.0
				160	6 5/16	45	1 3/4	1.2
				160	6 5/16	56	1 13/64	2.5

Minimum Order Quantity	N/A
Price
Packaging Details	Standard Export Delivery Package
Delivery Time	7days
Payment Terms	T/T
Supply Ability	Based on Detailed Order

Description This type of bit is used for making large cut holes in drifting and tunneling. A smaller hole is first drilled and then reamed to the final size in combination with a pilot adapter. • Widely used in drifting and tunneling • R28 thread system Color: Yellow,black or Based on Customer requirements Material: Tungsten carbide and high strength alloy steel Processing: CNC milling and proprietary heat treatment process Type: R28 Reaming Bit 6 Applications • Underground mining • Tunneling Competitive Advantage • High grade tungsten carbide inserts • Bit bodies manufactured from high grade steel and processed using state-of-the-art CNC machinery and heat treatment