Bevel Helical Gearboxes also known as Helical Bevel gearboxes are a way of transmitting high torque Nm and power Kw very efficently with low NVH. Our gears we make for this unit are all finish ground teeth helecial gears and finish ground hypoid spiral bevels gears. Input Spiral Bevel Hypoid- Ground Spiral Bevel Hypoid Teeth. Output Helical Gears- Ground Helical Teeth. Lubrication -SBH-32 Synthetic fluid grease - SBH-60 Fully synthetic oil. See more about the bevels we make in the link below-