Coupling sleeve    is 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, Reducer Coupling

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

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.

Litian Rock Tool

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.

Litian Rock Tool

Crossover couplings

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

Coupling Sleeve Product Parameter

In our rock drill bits factory, we have types of hard rock drilling tools for sale, if you have needs, please contact us.