Grease Migration — The Primary Failure Mode

In vertically mounted bearings, softer NLGI 2 greases can slump and migrate downward under gravity over time, leaving the upper bearing race under-lubricated. The stiffer NLGI 3 consistency of Polyrex EM 103 resists this migration and maintains correct bearing fill throughout the service interval.

Superior Oil Separation Resistance

Oil separation of just 0.1 mass% — meaningfully lower than standard Polyrex EM's 0.5% — reducing oil bleed and maintaining consistent lubrication in large-frame and high-temperature motor applications.

Excellent Water Washout Resistance

Water washout loss of just 0.8 wt% provides strong resistance to grease loss in humid or wash-down industrial environments where bearing housings are exposed to moisture.

OEM Compliance for Large Motors

Many large-frame electric motor OEMs specify a firmer NLGI 3 grease for the higher loads and bearing geometries common in large industrial drive motors — Polyrex EM 103 meets this requirement directly.

Stiffer Consistency for Demanding Mounts

The NLGI 3 grade resists slumping and migration in vertically mounted bearings, holding its structure where a softer NLGI 2 grease would run out of the bearing housing under gravity.

Advanced Polyurea Thickener

Increased durability versus conventional polyurea greases when subjected to mechanical shear forces — maintaining grease structure and bearing protection over the full service interval.

Outstanding Grease Life

750+ hours of lubrication life at 177°C allows significantly extended re-lubrication intervals — reducing maintenance frequency and labour cost across large electric motor populations.

Excellent Corrosion Resistance

Provides protection against rust and corrosion for bearing surfaces in humid and demanding industrial environments — protecting large-frame motor bearings from premature corrosion-related wear.

Excellent Low-Temperature Performance

Maintains bearing protection down to -29°C, ensuring reliable lubrication and motor start-up performance in cold storage, refrigeration and outdoor industrial environments.

Broad OEM Compatibility

Recommended for vertically mounted bearings and large-frame motors across major bearing and electric motor manufacturer specifications — simplifying procurement for large industrial drive applications.

Vertically Mounted Motor Bearings

Primary design application — electric motor bearings mounted in a vertical orientation, where the stiffer NLGI 3 consistency prevents grease migration and maintains correct bearing fill over time.

Large-Frame Electric Motors

Large motors where OEM specifications call for a firmer grease consistency than standard NLGI 2 — common on high-output industrial drive motors.

Fin Fan & Pump Bearings

Cooling fan and pump bearing applications operating at elevated temperature where a firmer grease consistency is specified by the OEM.

Sealed-for-Life Bearings

Factory-filled, sealed-for-life ball or roller bearings benefiting from low oil separation and extended lubrication life under continuous operation.

High-Temperature Operation

Ball or roller bearings operating at high temperature where low oil separation is required to maintain consistent lubrication and extend bearing life.

Humid & Wash-Down Environments

Motor bearings in humid or wash-down industrial environments where superior water washout resistance is required to prevent grease loss.

Both grades use the same advanced polyurea formulation — select by NLGI consistency and bearing orientation specified in your motor OEM manual