Condition	New	Color	black or Customized
Applicable Industries	Construction works , Energy & Mining, Tunneling	Diameter	45MM-76MM
Video outgoing-inspection	Provided	Thread Type	R25,R28,R32,R38,T38,T45,T51
Machinery Test Report	Provided	Key words	Coupling Sleeve
Brand Name	Jcdrill	Application	Mining / Quarrying / Tunneling/Blasting
Type	Drill Sleeve	Length	150MM-235MM
Machine Type	Drilling Tool	Formation	Hard / Medium hard / Soft Rock Formation
Material	Carbide	Bridge type	Semi-bridge / Full-bridge
Processing Type	Forging	Raw Material	High quality alloy steel
Use	Mining

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 Standard coupling using R28 thread system • R25 thread system • Widely used in drifting and tunneling Color: Black or Based on Customer requirements Material: Tungsten carbide and high strength alloy steel Processing: CNC milling and proprietary heat treatment process Type: R28 Standard Coupling Specification and function of the coupling sleeve: Full-Bridge Coupling sleeve Eliminates the potential for the coupling to creep along the threaded joints Typically used in surface applications Better uncoupling characteristics and tend to maintain tighter joints Less chance of jamming Best suited to machines equipped with independent rotation. Semi-Bridge Coupling sleeve Small non-threaded bridge in the center Steel cannot thread past bridge area Smaller diameter steel end portions fit together in the centre bridge area of the coupling Semi-bridged couplings are most suited to high torque machines Most rope and T threaded couplings are semi-bridged Same diameter Coupling sleeve Eliminates the potential for the coupling to creep along the threaded joints Typically used in surface applications Better uncoupling characteristics and tend to maintain tighter joints Less chance of jamming Best suited to machines equipped with independent rotation.