Lithium, polyurea & moly bearing greases
A thickener or additive name alone does not define an approved bearing lubricant.
On this page8 sections ⌄
What to check
Compare complete formulations
Lithium, lithium complex and polyurea labels do not specify base-oil viscosity, additives or compatibility with another product. Use exact technical data, not label colour.
Moly is not a universal upgrade
Solid-lubricant additives need application-specific approval. Do not assume a grease intended for sliding joints is suitable for every high-speed rolling bearing.
White lithium and multipurpose products
An accessible general-purpose grease is not automatically the right fill. Check bearing type, speed factor, temperature and existing fill before considering it.
Direct answer
Lithium and polyurea describe thickener families; moly normally refers to a solid-lubricant additive, not a directly equivalent thickener choice. Select a complete lubricant for the duty instead of ranking those three words as better or worse.
Decode the label before comparing products
On a small screen, scroll the table sideways to read every column.
| Label | What it describes | What remains to check |
|---|---|---|
| Lithium / lithium complex | Soap-based thickener family | Base oil, viscosity, additives and actual performance |
| Polyurea / di-urea | A non-soap thickener family / specific subtype | Exact formulation, operating duty and compatibility |
| Mineral / synthetic | Base-fluid description | Fluid chemistry and viscosity at temperature |
| Moly / MoS₂ | A solid-lubricant additive description | Whether the bearing application permits that additive |
| EP | Extreme-pressure performance / additive claim | The applicable test and equipment requirement |
| White / red / blue | Appearance | No chemistry or approval can be inferred |
Electric motor bearing grease: real candidates, defined scope
On a small screen, scroll the table sideways to read every column.
| Manufacturer record | Source-listed use or distinction | Boundary |
|---|---|---|
| Mobil Polyrex EM | Electric-motor ball and roller bearing applications; NLGI 2 | Verify the exact motor requirement and previous fill |
| Mobil Polyrex EM 103 | Firmer NLGI 3; considered where the motor maker calls for it, including some vertical arrangements | Not every vertical motor requires NLGI 3 |
| SKF LGHP 2 | Di-urea grease; listed examples include electric motors, industrial fans and water pumps | A listed application is not approval for an unidentified machine |
This is an evidence-based shortlist, not a sales ranking. The motor identity, bearing position, speed, temperature and relubrication provision remain necessary. A motor fitted with a factory-sealed bearing is not automatically a regreasable version. A sleeve-bearing fan requiring oil must not inherit a rolling-bearing grease instruction.
Use the comparison table for the recorded viscosity and consistency. No universal 'best motor grease' or cross-brand lubricant equivalent is assigned here.
Reference scope
Manufacturer and technical-institute records reviewed for this page: NLGI technical FAQs; Mobil industrial lubricant FAQs; Mobil Polyrex EM / EM 103 product data; SKF LGHP 2 technical product record; retrieved 2026-10-01 UTC. Values are a dated reference snapshot, not an OEM approval or a substitute for the current technical and safety documents. Original source addresses and retrieval evidence are retained in the private content audit.
Continue with real catalogue data
Preserve the full model, source description and unknown fields when making your shortlist. This reference website does not sell bearings or certify a replacement.
Related questions and tools
Grease vs oil bearing lubrication
Choose the lubrication system before choosing a product name.
Read and apply →Bearing grease viscosity vs NLGI consistency
NLGI grade and base-oil viscosity describe different properties.
Read and apply →Bearing grease compatibility: mixing & changeover
Grease colour does not identify its chemistry or establish compatibility.
Read and apply →Bearing regreasing quantity & interval
A useful maintenance schedule needs the actual equipment duty, not a universal number of pumps or months.
Read and apply →Sealed-for-life bearings: lubrication & maintenance
Sealed-for-life describes a maintenance concept, not infinite bearing or grease life.
Read and apply →High-temperature bearing lubrication checklist
Check the whole bearing system at temperature: lubricant, seals, cage, clearance and material stability.
Read and apply →Low-temperature bearing grease & starting torque
A bearing that runs acceptably when warm may struggle at a cold start.
Read and apply →High-speed bearing grease, oil-air & oil-mist checks
High-speed selection combines bearing geometry, lubricant supply, heat and preload.
Read and apply →Water exposure & food-grade bearing lubrication
A food-contact category and water resistance answer different questions.
Read and apply →Cleaning bearings before relubrication
Cleaning is a controlled maintenance operation, not a cure for damaged raceways.
Read and apply →Plain, linear & solid-lubricated bearing maintenance
Not every component in a bearing catalogue follows a rolling-bearing greasing procedure.
Read and apply →Wheel-bearing grease: NLGI ratings, types & product comparison
Choose wheel-bearing grease from the hub specification and service conditions, not its colour or the word 'premium'. Compare documented automotive and marine examples, then check the exact assembly before use.
Read and apply →Reference basis & data limits
Manufacturer terminology is retained in the product records. Technical reference basis: JTEKT Basic Bearing Knowledge (boundary dimensions, tolerance classes and lubrication); NSK Bearing ABCs (lubrication, designations and clearance); NTN technical FAQs (closure codes and component interchange); SKF rolling-bearing selection and maintenance references.
Selection workflows and catalogue grouping are BearingScope editorial aids. Verify the current drawing and application requirements before using a candidate. Missing database information is not converted into an assumed match.