Waterproof Stepper Motors

Automation of industrial processes often requires automation equipment to operate in the presence of water and aqueous fluids. Step motors are prone to short term failure in these conditions because they have several water entry point that make sealing virtually impossible.

Operating temperatures produce corrosive steam inside a motor, drastically shortening motor life.

Empire Magnetics’ waterproof step motors are specifically designed to address the corrosion and sealing rotating shafts and other fluid entry points.

Features include integrated design/solution to provide reliability in a water environment. The stainless steel exterior, bearings and shaft are highly corrosion resistant. the motor body is sealed with O-ring using integral housing seals. Double sealed cable entry excludes any entry of water. A specific mounting face gasket was designed to seal the motor to the mounting surface. The motor is filled with oil and a pressure equalizing diaphragm option is available for submersion applications. Other points of water leakage are dealt with by integral shaft seals and heavy winding insulation prevents short circuits.

A Combination of Environmental Options

For the most unique and demanding waterproof applications, Empire Magnetics’ WP motors can be combined with the following environmental options: radiation hardened, hazardous, dustproof and abrasive dustproof. Special chemical resistant versions are available. 316 stainless is available for saltwater submersion.

Waterproof Stepper Motors – Frames

The frame sizes, 23, 34, and 42 are offered in the stainless steel configuration.

Frame size selection:

Stainless steel waterproof stepper motors are available in three frame sizes with minor dimensional increases. Size 34 and 42 have motors have industry standard shaft, pilot, and bolt circle dimensions with a round mounting flange. Square flange versions are available. An optional industry standard size 23 compatible square flange adapter is available.

Waterproof stepper motors are supplied with threaded plugs installed in place of the air fittings. One or both supplies fittings may be installed to facilitate pressurization when oil filling is not employed. For submersion, internal air pressure must exceed water pressure to be effective. Shaft seals are rated to 15 psi.