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Next-generation cycloidal gearboxes ‘open a new chapter’
The Japanese-headquartered precision gearbox manufacturer Nabtesco has announced a new generation of enclosed, modular servo gearboxes which, it says, open “a new chapter in the field of cycloidal gears”. The Neco gears, available only in Europe, have a hysteresis loss of just 0.5 arc-min, and are attached to a motor shaft using a radial clamping ring that reduces inertia by up to 39%, resulting in highly dynamic performance.
The solid-shaft gearboxes, initially available in three sizes with dynamic torque ratings up to 3.06kNm, are said to offer short cycle times, with high productivity and efficiency. Mounting is simplified by avoiding the need to align the drive pinion. A flexible system with modular bushings and flanges simplifies adaptation for use with any standard servomotor. The robust gearboxes have dual-bearing eccentric shafts and a bearing-mounted input shaft, and offer high overload capacities and torsional rigidity. A lightweight design results in low inertia and power consumption.
A special anti-corrosion coating is combined with oxidation to provide good protection, including of the output shaft and running surfaces for the radial shaft seals.
Nabtesco says it is also revolutionising the ordering, configuration and handling of the gearboxes. It has redesigned the quick finder function on its Web site, and there is new online configurator that guides users to the right product. Users also have access to videos, manuals and live support via the Internet or QR codes.
The three initial sizes are the 133mm-diameter Neco-25 with a maximum torque of 612Nm, the 159mm Neco-42 with a torque rating of 1.03kNm, and the 221mm Neco-125 with a rating of 3.9kNm. Others are due follow “soon”.
Nabtesco claims to have 60% of the global market for precision reduction gearboxes used in industrial robots.
