• Power Ace Engineering Co

Hydraulic Shrink Disc

Power Ace Engg Co has introduced a patented, premium quality, Hydraulic Shrink Disc in the Indian market, sourced from TAS-Schafer, Germany, one of the leading manufacturers of premium quality internal and external locking devices. The product quality is certified by EN ISO-9001: 2000 – Germany. This device is to be fitted on hub which locks the shaft with the hub for further manufacturing activity. This is meant for highly stressed shaft-hub connections, a job earlier done by the age old keyway system of locking. In a keyway system a slot has to be made on the shaft as well as on the hub and a key (metal piece) has to be inserted between slots on shaft and hub in order to lock both, so that they rotate together. This process involves machining the shaft and the hub, inserting the key, then, hammering the shaft in the hub with the key or vice versa. A hydraulic shrink disc is extremely useful where shaft diameters are large, i.e., above 150 mm. In such cases it is very difficult and cumbersome and also costly to carry out keyway milling on such large diameter shafts, even if it is done, it is cumbersome to mount the part on such large diameter shafts. Here, a hydraulic shrink disc can be easily mounted. This disc requires just 5% oil in water emulsion and needs barely 170-200 bar pressure to loosen/tighten the bolts. This can be achieved by a hand-pump/electric pump. This enables fitting of such large diameter shrink discs at site. In future if the shaft and the hub needs to be separated from each other for repairs, etc., it can be simply done by re-pressurising the disc and loosening of bolts. It saves lots of time and energy, and it also can be reused. The locking devices avoid backlash that is sometimes encountered with keyed connections. They allow generous tolerances on shafts and hubs. Features and benefits include: Superior performance against reversing; dynamic and impact loading; ease of installation, assembly and disassembly; capable of transmitting high torques and axial loads; and precise positioning and adjustments, negligible notch effect. The mounting and dismounting can be done at site. These discs are presently available for 165 mm to 1000 mm shaft diameters.