D > ODGE P > OLY -D > ISC F > LEXIBLE C > OUPLINGS R > ESIST C > HEMICAL A > TTACK POLY-DISC flexible couplings use a non-metallic disc molded of a polyurethane compound to transmit torque. A special heat treatment after molding, refines the physical properties of the disc that allow it to remain pliable to cushion shock loads and still have resistance to most common chemicals such as acids, alkalis and petroleum products. The disc has an operating temperature range of -90΋ F to +170ڋ F.This coupling design features ړcaptured pins which reduce hole elongation in the element and pin wear on the flange. The disc has a light press fit over the pins which prevents the accumulation of abrasive particles between the disc and pins, eliminating sliding friction. Misalignments (2ԋ angular, 1/32ڔ parallel) are accommodated by the flexing of the element rather than the clearance between disc and pins. Consequently, the POLY-DISC coupling offers longer life and smoother, quieter operation.Automatic flange spacing, accomplished by space buttons molded into disc, speeds installation. The remaining parts of the coupling are machined all over. Both flanges are taper bored to receive TAPER-LOCK bushings, which permit quick and easy installation on shafts of different diameters without costly reboring. Shafts of 1/2Δ to 3-1/4 may be be coupled by seven stock sizes of Poly-Disc. Three typesԗHH, HF, and FFpermit a choice of installing the bushings from inside or outside the face of the flange. PT Cׯݯ size="-5">