The UK..ZZ series is a freewheel incorporating a 62.. series bearing. The self-centring freewheels are already greaselubricated and come with dust-proof protection For the UK..ZZ model, the transmission occurs by fitting keying with n6 tolerance for shaft and N6 for the seat. The UKC..ZZ model is equipped with a keyway on the inner race and should be fitted on k6 tolerance shafts. Seat fitting must be carried out with N6 keying tolerance. The UKCC..ZZ model is equipped with a keyway on the inner and outer race, the tolerances are h6 for the shaft and H6 for the rigid seat. The UK..ZZ Series is built with a C5 clearance that turns into a normal clearance after keying. The races can be glued to the shaft and the seat. In this case, the clearance remains C5. Working temperature: -10°C +60°C In case of different values please contact us