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News

Bevel geared motors challenge worms on energy efficiency

Lenze (also Techdrives) : 30 September, 2012  (New Product)
The Lenze GKR bevel geared motors are an ideal replacement for worm geared motors, offering massive savings in energy costs. The extra purchase cost is paid back in only a few months of continuous running as the efficiency im-proves from 50-70% up to 96%. These geared motors are available for motor powers from 60W to 7.5kW with output torques up to 450Nm and ratios up to i = 76
Bevel geared motors challenge worms on energy efficiency

The GKR bevel range actually contains two gear stages. The first stage is a helical with a small ratio. Then contained within the cast housing is a bevel output gear stage with case hardened steel teeth. Modular options to aid mounting include male or hol-low shafts, foot mounting, single or double flanges.

There are three areas where the bevel gearbox shows clear advantages over worm designs. Firstly the backlash is low at typically around 10 arc mins. This makes then suitable for accurate positioning tasks and they can be combined with servo motors. Secondly the low backlash is maintained as the wear rate is insignificant over normal lifetimes. Again this allows use for positioning with servo technology.

The third advantage is the high efficiency which is a constant at 96% irrespective of ratio. Although the reduction in energy cost for a single geared motor may be rela-tively small, where there are multiple drives running continuously the savings can be thousands of pounds a year compared to worm geared motors.

Lenze GKR geared motors are readily available in 4 sizes with up to 25 closely stepped ratios per size. Motor options include blowers, encoders, brakes and integrated frequency inverters.

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