AUSTRALIAN Baldor has launched a range of all-stainless-steel gearboxes for electric motors, providing machine builders with optimal speed-reducing solutions for clean-area automation such as conveyors.
The worm-style gearboxes set a new performance standard for food, pharmaceutical and chemical machinery applications through advanced features that include complete sealing, very smooth 316-grade steel exterior surfaces, and a hollow shaft for direct connection to the load.
The new Baldor 900 Series of gearboxes provides a single reduction with a choice of 8 ratios from 60 to 5 - providing a 29 to 350rpm output from a standard 1750rpm motor for example.
A C-face quill-style input is provided for connection to the motor. Three sizes are available, spanning centre distances from 1.75 to 2.62inches/4.45 to 6.66cm, supporting continuous duty output torques from 160 to 1074in-lbs/18-121Nm depending on the model variant selected from a range of over 50.
For maximum reliability and ease of use, the gearboxes include an internal compression chamber and expansion bladder. These features eliminate the need for a breather vent, which can provide a route for contaminants such as water - a major cause of failure in pressure-washdown processing environments.
Additionally, the gearboxes are constructed using all stainless steel materials, with high-grade 316 material used for the exterior casing. This provides a very high resistance to corrosion, for compatibility with caustic cleaning agents, and even the ability to be used in harsh chemical processing environments.
The casing is cast using a special mould to create a standard surface finish of typically ~6.3Ra. This smoothness can be enhanced even further with Baldor's optional electro-polishing service.
The protection delivered by these features provides a much more robust and versatile solution than conventional gearboxes made with cast iron or aluminium - which are prone to pitting corrosion and other damage from cleaning solutions.
Another factor in optimising the gearboxes' suitability for washdown environments is the provision of hollow-bore shafts. These facilitate direct connection to loads, eliminating the cost and space required for a coupling mechanism, and with it any need for washdown guarding. Solid shafts are also available.
Baldor offers a range of compatible stainless steel motors to complement the 900 Series gearboxes.