... R28, R32, R38, T38,T45, T51 Atlas Copco, Sandvik, Ingersoll Rand,Furukawa and Boat longyear Coupling SleeveCoupling sleeves, other ... rotation.After special heat treatment, Pro-drill’s Coupling sleeve ensuring the ends touch for efficient energy transmission ... size: R22, R25, R28, R32, R38, T38,T45, T51; Coupling sleeve design: full bridge coupling sleeve, semi-bridge coupling sleeve. Coupling Sleeves