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PRODUCTS CLUTCHES, BRAKES & COUPLINGS CONVEYOR SYSTEM COUPLINGS IMPROVING TAPE MANUFACTURE


Suitable for precise positioning and general industrial conveyor systems, Ruland’s Oldham couplings are zero-backlash, have a balanced design, accommodate large parallel misalignment, and are versatile. They also facilitate easy disassembly of rollers to allow for cleaning, replacement and general maintenance. The couplings comprise of two anodized aluminium hubs and a torque transmitting centre disk. Torque transmission is accomplished by mating the slots on the centre disk to the drive tenons on the hubs. Oldham couplings accommodate all forms of misalignment, are


best suited for parallel misalignment, and operate with low bearing loads protecting system components such as bearings. The disk is available in a range of materials and, if wear or failure occurs, the disk can be replaced. In addition, the couplings are electrically isolating due to the non-conductive nature of the centre disk, helping to prevent electrical currents from being passed to delicate instruments. They also act as a mechanical fuse in torque overload situations, with the disk cleanly breaking and stopping power transmission. Bore sizes range from 3-30mm and stainless steel hubs are available for use in high corrosion or clean room environments. Furthermore, the disks can be manufactured with a centre hole to allow further shaft penetration or tapped holes to attach the disk to a hub so it stays in place during disassembly. The couplings are available from Acorn Industrial Services.


Ruland Manufacturing Acorn Industrial Services


www.ruland.com www.acorn-ind.co.uk


Cable Tapes of Manchester works with a range of materials, producing high quality tape for electrical cables to improve fire resistance, protect against water damage and prevent electric shocks. To keep up with demands, the company installed seven new taping machines and a duplex slitting machine. However, the brakes on the machines nearly always ran hot, an indication that they


were being worked beyond their capacity. Following research, the company realised that the overheating problems could be overcome by using the ZF brakes from Drive Lines. These also offered improved tension control leading to better product quality. ZF hysteresis brakes provide a simple solution to tension control applications. They operate on the principle of opposite magnetic poles attracting each other in synchronous mode and on continuous magnetic reversal in slip mode. With the magnetic forces acting through an air gap the brakes provide non-contact torque transmission which is variable through an associated electronic controller. The brake torque depends on the current supplied and is largely independent of speed, with full transferable torque available from zero to maximum speed. The brakes can be applied in nominal sizes from 0.05Nm to 520Nm depending on


size. They are available in bearing versions with shaft ends or non-bearing versions as individual components. The brakes have a power capacity of up to 2000W during continuous operation or 4000W for short term operations. They can be used in both the slip mode or as holding brakes. Cable Tapes’ chairman, Martin Van


Der Zwan, said: “The retrofit went extremely smoothly and we have seen immediate benefits. Indeed the project has been so successful that we are considering fitting ZF brakes to our other machines too.”


Drive Lines Technologies T: 01234 360689 www.drivelines.co.uk


48 APRIL 2016 | DESIGN SOLUTIONS


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