On type CNAS clutches torque transmission from the outer race is by interference fit with the housing bore which has to be to H6 or J7 tolerance. The housing should be in Steel or high grade cast iron with minimum outside diameter to dimension 'K' in the table. Transmission from shaft is by a key with recommended shaft tolerance h6 or j6, except for clutch CNAS 6 where transmission is by press-fit onto shaft with n6 tolerance.
Visit the Cross and Morse website for more information on Roller Ramp Clutches