Helical-bevel gearboxes are a type of gearboxes consisting of at least two reduction stages, one stage being bevel gear wheels and the next being helical gwar wheels. A helical-bevel gearbox is a bevel gearbox. It is characterized by very high efficiency reaching 97%. The main advantages of helical-bevel gearboxes include high resistance to bending and their silent running. Depending on the gear ratio, we have two-, three- and four-stage gearboxes. Bonfiglioli helical-bevel gearboxes are marked with A.

Bonfiglioli supplies helical-bevel motoreductors in several versions:

• flange-mounted gearboxes for IEC or NEMA standard electric motors,
• flange-mounted gearbox for servomotors
• gearbox with integrated motor
• a reducer with an input shaft with a keyway.

The range of gear ratios in Bonfiglioli helical-bevel gearboxes is from I=5,4 to I= 1715.

An important advantage of helical-bevel gearboxes is also the possibility of output configuration:

• hollow shaft with keyway (two diameters available)
• full shaft with keyway (single or double sided)
• smooth hollow shaft with clamping ring
• hollow shaft with multi-keyway
• smooth hollow shaft with reduction bushings and clamping ring
• foot, flange or reaction arm mountings,