Energy savings, higher throughput rates, and reduced downtime – all without compromise to quality or accuracy – are on the minds of almost every machine design engineer today.
To address this requirement is a torque limiter, the SL Series, with half the inertia and less than half the mass, allowing for a rapid and automatic recovery from torque overload even in the most advanced drive technology.
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One example achieving size reduction is a torque limiter rated to disengage at 160Nm, which, in the past, would have had, at best, a mass of 1.3kg and a moment of inertia of 1.6 * 10-3 kgm2, now weighs 370g with a moment of inertia of 0.8 * 10-3 kgm2.
In addition to custom material specifications, specially designed spring systems, and some improvements to the ball detent configuration – resulting in a 40% increase in torque capacity for a given size – the weight reduction was also achieved through the compression of individual components.
The four sizes (Series 30 / 60 / 150 / 300) cover disengagement torque values from 5Nm to 700Nm, and involve various mounting options, including both direct and indirect drive versions. Models SLN (clamping) and SLP (keyway) attach by flange to sprockets, sheaves, pulleys, and gears, and include an integral dual bearing system to support belt and chain tension when properly located over the shaft. Models SL2 (bellows coupling) and SLE (servo insert coupling) mount inline between two independently supported shafts, such as motor to ballscrew connections, and compensate for the small but inevitable misalignment which exists in this type of machine layout.
R+W America L.P.
Bensenville, IL
rw-america.com
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