MOTORS

Outline

Product Information

(1)	Vacuum Grades Laboratory, Standard and Commercial Grades are available. - Laboratory Grade : The vacuum rating for this motors is 10-7 Torr. The internal temperature rating is 180°C internal and 155°C for the case. The bearing lubricant vapor pressure is below 10-9 Torr at 100°C. - Standard Grade : These products have a vacuum rating of 10-7 Torr and temperature rating of 155°C internal and 130°Cfor the case. The bearing lubricant vapor pressure is below 10-8 Torr at 100°C. - Commercial Grade: The Commercial Grade had a vacuum rating of 10-6 Torr. These motors are temperature rated at 130°C internal, and 105°C for the case.
(2)	Radiation Hardened Products High energy gamma radiation will attack all of the materials in a device, however the non-metallic materials in a motor or resolver are subject to more rapid breakdown. Lubricants, varnish, adhesives, insulations, and cables deteriorate and ultimately crumble. Empire Magnetics radiation hardened (RH-) products combine the best available radiation resistant materials with practical commercial practices to provide products with the longest possible service life within pragmatic budgetary considerations.
(3)	Submersible Waterproof Products Stainless steel housed steppers and A.C. induction motors provide corrosion resistance, and easy to clean features. The stainless steel packages are useful in nuclear reactor applications, while the A.C. motors are frequently found in the food processing industry.
(4)	Dustproof Products Features include built-in O ring seals that eliminate dust leaks at potential penetration points, motor insulation that allows operating at 145°C, case temperature (185°C winding temperature) and air fittings for pressurization are supplied; pressure rated to 15 psi to lock out contamination.
(5)	Abrasive Dustproof Products Features include, built-in O ring seals that eliminate dust leaks at potential penetration points, housing seals including a shaft slinger and seal prevent abrasive dust from entering the bearing, motor insulation that allows operating at 145°C, case temperature (185°C winding temperature) and air fittings for pressurization are supplied; pressure rated to 15 psi to lock out contamination.
(6)	Hazardous Area Motors Two commonly used methods are Explosion Proof (EP) and Purged and Pressurized (PT). Explosion Proof devices are intended to withstand and contain an expected explosion, Purged and Pressurized systems are intended to prevent an explosion from occurring.
(7)	Extended Temperature Products In typical stepper motor applications these motors will operate successfully up to +155°C. Provided the change in temperature does not exceed 10°C. per minute, these motors can be used in a very wide range of temperatures. The HT series products without modifications are useful from 0 to about +155°C. For temperatures from 0 to -20°C most of the HT products can be used, but different lubrications are required. From -20 to -40°C some select products are suitable.
(8)	Cryogenic Products Cryogenic temperatures (to 20 degrees Kelvin) call for motors designed with materials carefully selected for compatible thermal expansion characteristics and resistance to brittleness. CY Series motors feature special cryogenic dry lubrication and proprietary metal and or metal alloy components.
(9)	Industrial Grade Products Empire Magnetics offers the Industrial grade (IN- versions) which provide the same performance characteristics as the environmentally conditioned products, but we use commercially accepted materials and mechanical configurations to keep the cost low. If you are just starting a project, the IN- versions may provide the least cost and the shortest time to testing a prototype.