Precision Gearboxes

Planetary Gearboxes

Planetary gearboxes give the ability to increase the torque and lower the speed of an electric motor, such as a stepper motor, thereby transforming the power and improving control of an electro-mechanical system.

The Reliance planetary gearboxes offer low backlash, high torsional stiffness, and high levels of efficiency, suitable for industrial automation applications.

Designed specifically to suit NEMA 17 and NEMA 23 motors. They are ideally suited to work with the Reliance Cool Muscle intelligent servo system in high torque applications where positional feedback is important.

We offer 3 plantary gearboxes – the RGP40 and RGP60 provide a compact solution for integration with Reliance Cool Muscle, whilst the RGPN70 is for high precision, higher stiffness, higher torque and lower backlash applications.

Ratios from 3:1 to 512:1 with maximum output torques up to 123Nm. The RGPN70 low backlash unit offers less than 3 arc minutes of backlash.

Precision machined gear profiles, case hardened and honed for higher load capacity, low noise, minimum wear and consistent backlash.

A balanced motor shaft clamping ring allows high input speeds up to 18,000 rpm.

View catalogue section for the planetary gearboxes

Hypoid Gearboxes

For higher ratio requirements, between 5:1 and 10:1, we offer the HY series hypoid gearbox, also with a fully sealed aluminium housing and  carbon steel gears and shafting.

The hypoid gear pass allows for a high torque transmission coupled with a high ratio all within a compact package. Mounted in ball bearings the unit is fully lubricated and sealed for life. The variation of mounting holes allows the gearbox to be mounted on any face for greater assembly flexibility.

Bevel Gearboxes

Reliance Bevel and Hypoid Gearboxes provide an economic, space saving solution for right angle motion in a restricted space envelope. There are 3 types of gearbox available from Reliance.

Bevel Gearboxes are available with either single or double output shaft configurations with either 1:1 or 2:1 ratios.

The BE series is the most economical choice, offered with stainless steel bevel gears mounted in plain bearings, with either 1:1 or 2:1 ratios. It is a small, compact, anodised aluminium unit, with a removable, plastic, clip-on cover. The unit can be easily mounted into an assembly to provide a 90º drive where space prevents a direct layout.

The BS series is a one-piece, slim-line aluminium housing with stainless steel bevel gears and shafting, offered in single or double output configurations with either 1:1 or 2:1 ratios. Using ISO 8 quality bevel gears, when assembled the backlash of the assembly is as low as

The BS and BE series bevel gearboxes are suited to low-load industrial applications. For higher ratio requirements, between 5:1 and 10:1, we offer the HY series hypoid gearbox.

Epicyclic Gearboxes

Reliance Epicyclic Modules are available in ratios of 3:1, 4:1 and 5:1. Their unique design allows the units to be stacked together providing higher ratios. It is ideal for heavier duty, or long-life, torque amplification, and speed reduction applications; the units have been used successfully in sealed sub-sea applications and in motorsports mechanisms.

Transmission Efficiency, 98% per single unit, 95% in double units, the power source may be smaller than with many other reduction gears.

Gear noise is reduced by a special construction of disk-sided planetary gears.

The inherent problem of loadsharing with planetary gear systems is solved by the load equalised construction.

The epicyclic module is a compact unit with high torque transmission because it is designed to equalise the loads of each planetary gear.

The inherent problem of load sharing with planetary gear systems is solved by the use of pitch disks which are designed to equalise the load of each planet gear.

View catalogue section for the epicyclic modules