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Coupling Sleeve

Coupling Sleeveis a sleeve-shaped rock drilling component with internal threads for connecting shank adapter and drill rod, or drill rod and drill rod. We produce and provide three types of drill rod couplings– semi bridge couplings, full bridge couplings, and crossover couplings, which can meet the requirements of all applications.

Product Specification

Product

Top Hammer Rock Drilling Tool - Coupling Sleeves

Other Names

Couplings, Drill Rod Couplings, Drill Coupling Sleeve,

Material

Structural Alloy Steel

Application

Tunneling , Mining , Quarrying, Blasting and Infrastructure Construction

Facedrilling and Bolting, Bench Drilling, Production drilling, Long hole drilling, Drifting

Thread

R25, R32, R35, R38, T38, T45, T51

Coupling Type

Standard Couplings (Semi bridge Couplings)

Full bridge Couplings

Crossover Couplings (Adapter Couplings, Reduction Couplings, Reducer Coupling)

Diameter

33~72mm

Length

150mm~235mm

Custom Design

Thread, Diameter, Length can be customized

Standard coupling sleeve

Standard coupling sleeve, also known as semi bridge coupling sleeve, has a section of the bridge without a thread in the middle. The threaded part of the drill pipe cannot be screwed through the bridge part of the coupling, and the end of the thread can closely adhere to the casing bridge zone. Standard coupling sleeve is particularly suitable for high-torque drilling rigs. Most rope thread (R thread) and trapezoidal thread (T thread) coupling sleeves are with half-bridge type. The half-bridge type is by far the most widely used couplings.

Full bridge coupling sleeve

Full bridge coupling sleeve can completely eliminate the looseness of the coupling sleeves along with the threaded connection. It is mainly used in surface mining, with better disassembly characteristics, firmer connections, and almost no clamping situation.

Crossover couplings

Crossover couplings are used to convert different thread types or thread diameter sizes.

Coupling Sleeve Product Parameter

Thread

Length

Diameter

Weight

Model No.

Part No.

[mm]

[in]

[mm]

[in]

[kg]

R32

160

6 1/4"

45

1 3/4"

1

LR32-D45-160

R38

180

7 1/8"

56

2 13/64"

2

LR38-D56-180

T38

190

7 1/2"

56

2 13/64"

LT38-D56-190

T45

210

8 1/8"

63

2 31/64"

LT45-D63-210

T51

235

9 1/4"

71

2 51/64"

LT51-D71-235

R38-R32

190

7 1/2"

56

2 13/64"

LR38/R32-D56-190

T38-R32

190

7 1/2"

56

2 13/64"

LT38/R32-D56-190

T38-R38

190

7 1/2"

56

2 13/64"

LT38/R38-56-190

T51-T45

225

8 7/8"

71

2 51/64"

LT51/T45-D71-225

As a rock drill bits factory, we will do our best to meet all the needs of customers.



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