Pulleys eliminate keyway machining expense
A
Cross + Morse product story
Edited by the Engineeringtalk editorial team
May 23, 2001
The expense and inconvenience of keyway machining and finish-boring when fitting timing belt pulleys are entirely eliminated with the new Avante range of pulleys from Cross and Morse
The expense and inconvenience of keyway machining and finish-boring when fitting timing belt pulleys are entirely eliminated with the new Avante range of pulleys from Cross and Morse.
In addition, the new pulleys require no retaining screw and plate, obviating the need for a threaded hole in the shaft end and, for a given size, they have higher torque handling capacities than conventional pulleys.
Each Cross and Morse Avante pulley is installed in conjunction with a specially designed expanding-bush shaft clamping element.
These elements are available in five sizes, to fit shafts from 11mm to 60mm in diameter and, once the pulley is correctly positioned, they are simply retained in place by tightening six set screws.
Pulleys are available in a wide range of sizes and profiles to suit 5mm and 10mm standard belts, providing, for the first time, a means of making an expanding-bush connection between metric T-series pulleys and main shafting.
Also included in the range are pulleys for use with 5mm, 8mm and 14mm HTD belts.
Pulleys for polyurethane T-series belts are manufactured from aluminium, while HTD versions are available in a choice of steel or cast iron.
With the expanding-bush clamping system used by Avante pulleys, the driving torque is distributed evenly over the whole surface area of the shaft which is in contact with the clamping element, rather than being concentrated around the keyway, as it is with standard pulleys.
As a result, smaller shafts can often be used, providing valuable savings in material.
Further cost savings are provided by the ease with which Avante pulleys can be fitted, which speeds and simplifies machine assembly.
In addition, the high contact pressure between the clamping element and the shaft eliminates the risk of rusting or corrosion at this point, ensuring that pulleys can be removed easily, even after years of service.
Cross and Morse is one of the UK's leading and most experienced manufacturers of power transmission products.
The company is dedicated not only to developing and supplying products which accurately match the requirements of today's market, but also to providing unrivalled service and support for its customers.
Cross and Morse was successfully assessed by Lloyds in 1992, and is now registered as an approved manufacturer to ISO 9002:1994.
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