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Rotation from Light Engineering

Following a request from a Scandinavian shipping line for a giant mirror ball to be installed permanently on a cruise liner, Light Engineering’s legendary range of British made super safe, heavy duty rotators, have been further improved.

Still retaining the “stepped” shaft design and extra efficient steel ball thrust bearing, they now include the addition of an “Iglidur” flange bearing, secured by a specially machined aluminium block. Before, the recommendation was that they should only be mounted on a horizontal surface. With the extra lateral support this new additional bearing provides for the output shaft and gearbox, they can now be used in almost any orientation, even allowing for the possible extremes of pitch and roll experienced on a passenger liner.

All are still designed to incorporate a factor of safety (F.O.S.) of at least 10:1 and use only tested and certificated shackles and couplings, including a jaw-to-jaw swivel on each that acts as a clutch to protect the gearbox. The output shafts are also now machined from “crack detected” steel stock, including the new Extra Super Heavy Duty 300kg monster, that Light Engineering are working on.

Available in August this year, the new ESHD rotator, incorporates all the

improvements mentioned above, plus a brand new safety fixing. Conservatively rated at 300kg safe working load (S.W.L.) it has been tested to 3.3 tonnes using just two of the six available fixing holes. It didn’t fail at this weight but the test was stopped for safety reasons.

There will now be three heavy duty rotators available in the range with Safe Working Loads of 25kg, 100kg and 300kg respectively. Suitable for mirror balls from 500mm to 3000mm and many other items.

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Rotation from Light Engineering

16th July 2007

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