Coupling Sleeve

• Product introduction
• Product parameters

Introduction to Coupling Sleeve

It is the part connecting shank and rod, rod and rod. The processing of thread affects the losses of power. Coupling is used for connecting shank adapter and extension drill rod together, or for connecting two extension rods together. Besides normal equal couplings, we also offer reducing couplings that are able for changing thread type and size. The couplings we offer can be applied for our top hammer drilling system, suitable for drilling duties in tunneling, construction, mining, quarrying, etc.

Parameters

• Thread type: R25, R28, R32, R38, T38, T45, T51
• Diameter: 35mm, 40mm, 45mm, 55mm, 63mm, 66mm, 72mm, 76mm
• Length: 150mm, 155mm, 170mm, 180mm , 180mm, 190mm, 210mm , 235mm
• Coupling type: Semi-bridge, Full bridge, Adapter Coupling
• Wall Thickness：Normal Type,Thicken Type 

Features

• Made from steel as same grade as internationally well-known brand.
• CNC processing procedure ensure the perfect match of thread.
• Reliable quality from precise supervision of heat-treatment
• High transmission efficiency grants high drilling efficiency for the drilling system.

Applications

Drilling works for blasting duties in tunneling, construction, mining, quarrying, etc.

Specifications：

Coupling Sleeve
Thread	Diameter			Length
	mm		inch	mm	inch
R25	35		1 19/50	150	5 9/10
R28	40		1 29/50	155	6 1/10
R32	45		1 3/4	170	6 57/64
R38	55		2 5/32	170	6 57/64
T38	55		2 5/32	190	7 33/64
T45	63		2 15/32	210	8 17/64
T45	66		2 19/32	210	8 17/64
T51	72		2 7/8	235	9 1/4
T51	76		3	235	9 1/4
Adapter Coupling / Crossover Coupling
Thread		Diameter		Length
A	B	mm	inch	mm	inch
R25	R32	45	1 3/4	170	6 57/64
R28	R32	45	1 3/4	170	6 57/64
R32	R38	55	2 5/32	180	7 1/8
R32	T38	55	2 5/32	180	7 1/8
R38	T38	55	2 5/32	190	7 33/64