Chesterton 638 EMG
The Chesterton 638 EMG Electric Motor Grease is designed for electric motor bearings operating in demanding conditions. 638 EMG has outstanding anti-wear and extreme-pressure resistance. It can be used in motors operating with high vibrations, and constant start/stop regimes. Its extreme-pressure additives are safe for non-ferrous metals (windings, bushings, bearing cages) making it a preferred choice for electric motor bearings.
638 EMG is made with synthetic base oil, proprietary sulfonate thickener, and Chesterton QBT additive technology. It has a dropping point of 318°C (604°F) that provides excellent thermal stability. It has excellent water washout resistance to survive under heavy water exposure.
638 EMG grease can extend bearing life, reduce equipment failures, while improving the operational efficiency of lubricated elements. 638 EMG has been shown to be compatible with most OEM specified, shear stable Polyurea or Lithium complex thickened electric motor greases, as determined by shear stability testing per ASTM D 217.
SDS: Chesterton 638 EMG 46 # 2 Electric Motor Grease (English – NA) (pdf)
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Description
| Synthetic base fluid fortified with high performance additives |
| Excellent thermal and mechanical stability |
| Compatible extreme-pressure additives with non-ferrous metals |
| Outstanding resistance to extreme pressure, vibration, and start/stop |
| Virtually waterproof and steam resistant |
| Corrosion resistant protective lubricant |
| Compatible with ferrous and non-ferrous metals, most seals and elastomers |
Electrical motors and generators exposed to severe industrial conditions of corrosion, moisture, vibration
Motors for forced draft, induction draft fans, fin fans, blowers, HVAC
Motors for pumps, agitators, compressors, mixers, conveyors, and gear boxes
Ball and roller bearings, with medium to high speeds; nDm 80,000 – 800,000
Motors operating in high and low temperature conditions, speeds from less than 1750, and up to 3550 RPM (ISO 100 and 46 viscosities available)