Hypoid gearboxes for servo motors
The SK range from Vogel are right-angle gearboxes suited to use with servo motors. Whilst in-line servo geared motors will generally use planetary gearing, the SK uses a ground hypoid gearset to give similar levels of performance but with a 90º output. Hypoid gears deliver high efficiency at 94 to 95%, and offer other features to suit servo motors such as low inertia, low backlash and high input speeds.
Hypoid gears resemble bevel gears except that the shaft axes do not intersect. They look like a cross between worm and a bevel gearset. Tooth contact is progressive and smoother than spiral bevel gears with a large contact area leading to lower noise levels and a long service life.
The Vogel SK has a pair of hypoid gears fully supported on the input and output shafts giving a range of ratios from 3 to 10. Rated output torques in three sizes run from 40 to 150Nm with a standard backlash of 4 to 5 arcmins measured at the input shaft. On request this can be reduced to 2 to 3 arcmins by gear matching. Maximum input speed is 7500 rev/min on an intermittent basis and noise levels are little lower than planetary gearboxes.
SK gearboxes can be supplied with inputs to match common servo motor frame sizes.
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