KLÜBER to Mobil Spindle Bearing Grease Cross-Reference Table
| KLÜBER Product | Equivalent Product | Compatibility & Notes |
| ISOFLEX TOPAS NB 52 | Mobil Polyrex EM | Barium complex vs polyurea. ISOFLEX TOPAS to 2M DN vs Polyrex EM to 1M DN. For ultra-high-speed, ISOFLEX preferred. |
| ISOFLEX TOPAS NB 5051 | Mobil Polyrex EM | Higher base oil viscosity version. Verify speed factor and temperature range for your spindle. |
| ISOFLEX NBU 15 | Mobilith SHC 100 | Ester-based vs PAO. NBU 15 has lower friction coefficient from ester base oil for high-speed applications. |
| Kluberspeed BF 72-22 | Mobil Polyrex EM | Both polyurea thickener. Kluberspeed optimized for low-noise; Polyrex EM is common OEM motor bearing fill. |
Reference: Published product datasheets from KLÜBER Lubrication and Mobil. Verify with current datasheets before substitution.
⚠ Important Disclaimer
This cross-reference is provided for informational purposes only. Equivalent does not mean identical — differences in thickener type, base oil viscosity, additive packages, and NLGI grade can affect performance. Always verify technical compatibility by consulting both manufacturers' datasheets and obtaining OEM approval before substituting lubricants. Contact KOEED for verified KLÜBER product recommendations matched to your specific application requirements.
> Tip
When cross-referencing, always verify: (1) thickener compatibility — mixing incompatible thickeners can cause grease to soften or harden, (2) base oil viscosity at operating temperature, (3) NLGI grade for proper consistency, (4) certification status (NSF H1, ISO 21469) for food-grade applications. If in doubt, contact KOEED for a verified recommendation.
Frequently Asked Questions
Q: Why do machine tool OEMs often specify KLÜBER ISOFLEX for spindle bearings?
KLÜBER co-engineers spindle greases directly with major machine tool OEMs (DMG MORI, Makino, Mazak, Haas, etc.) during spindle development. ISOFLEX TOPAS was developed in partnership with spindle bearing manufacturers to achieve the 2 million DN rating demanded by modern high-speed machining centers. This OEM co-engineering relationship means KLÜBER products are often on the approved lubricant list by name.