Top hammer drilling tools

Coupling Sleeves

Both semi-bridge and full-bridge coupling sleeves are manufactured by SINODRILLS

Description

SINODRILLS Coupling Sleeves

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



Features

• Premium steel as material, precision CNC for manufacturing, accuracy and reliability assured;

• High transmission efficiency grants high drilling efficiency for the drilling system.



Applications

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



Coupling Sleeve



Thread


DiameterLength


mm


inchmminch


R25


351 19/501505 9/10


R28


401 29/501556 1/10


R32


451 3/41706 57/64


R38


552 5/321706 57/64


T38


552 5/321907 33/64


T45


632 15/322108 17/64


T45


662 19/322108 17/64


T51


722 7/82359 1/4


T51


7632359 1/4


Adapter Coupling / Crossover Coupling



Thread


DiameterLength


A


Bmminchmminch


R25


R32451 3/41706 57/64


R28


R32451 3/41706 57/64


R32


R38552 5/321807 1/8


R32


T38552 5/321807 1/8


R38


T38552 5/321907 33/64