The ETP-Classic is used for mounting timing belt pulleys, cam curves and also arms. It is easy and quick to position the ETP-Classic along and around the shaft with precision. Maintenance and service are easy because of the simple way of dismantling. The ETP-classic comprises a double-walled hardened steel sleeve filled with a specially chosen pressure medium, sealing ring, piston, pressure flange and clamping screws. During the tightening of the screws, the sleeve expands uniformly against the hub and the shaft forming a rigid joint. During the loosening of the screws, the sleeve is back to its original measurements and can be dismantled easily.