KLUBER to FUCHS Grease Cross Reference Guide
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KLUBER to FUCHS Grease Cross Reference Guide
Industrial lubrication professionals often encounter situations where a specified grease is unavailable due to supply chain issues, regional availability, or cost factors. KLUBER Lubrication and FUCHS Lubricants are two respected names in specialty lubricants, each with comprehensive portfolios spanning high-performance greases, gear oils, and food-grade fluids.
This guide identifies functionally comparable products for four commonly referenced lubricants, based on thickener chemistry, base oil type, NLGI grade, temperature range, and application domain. These are not identical formulations but products that serve similar application profiles and can often be substituted after proper engineering review.
Cross Reference Table
| KLUBER Product | FUCHS Alternative | Application Domain | Key Commonality |
|---|---|---|---|
| ISOFLEX TOPAS NB 52 | RENOLIT CX-TOM 15 | Low-temperature bearing grease | Synthetic/semi-synthetic base with wide temperature range |
| Staburags NBU 12 | RENOLIT EP 2 | Heavy-duty EP grease for wet conditions | EP additives, water resistance, NLGI 2 consistency |
| Klubersynth UH1 6-100 | CASSIDA Fluid HF 32 | Food-grade synthetic fluid | NSF H1 registered, synthetic base, food-processing environments |
| Kluberplex BEM 41-132 | RENOLIT MP 2 | Multi-purpose rolling bearing grease | Lithium soap thickener, NLGI 2, general industrial use |
Pair 1: ISOFLEX TOPAS NB 52 to RENOLIT CX-TOM 15
ISOFLEX TOPAS NB 52 (KLUBER)
ISOFLEX TOPAS NB 52 is a fully synthetic bearing grease using a synthetic hydrocarbon base oil with a barium complex soap thickener. It is beige with a short-fibre texture. The base oil viscosity at 40 degrees Celsius is approximately 30 mmĀ²/s, and at 100 degrees Celsius it is roughly 5.9 mmĀ²/s. Worked penetration at 25 degrees Celsius is 265 to 295, placing it at NLGI Grade 2. Its operating temperature range spans minus 50 degrees Celsius to 120 degrees Celsius continuous, with short-term peaks to 150 degrees Celsius. The dropping point exceeds 240 degrees Celsius, with a speed factor of approximately 1,000,000 mm/min. Corrosion protection is rated Emcor Level 0. Applications include high-speed and low-temperature rolling bearings, pump and fan bearings, precision gear mechanisms, and electrical contacts. It also shows good compatibility with many plastics.
RENOLIT CX-TOM 15 (FUCHS)
RENOLIT CX-TOM 15 is a calcium sulphonate complex soap grease with semi-synthetic base oil. It has a light brown colour and base oil viscosity at 40 degrees Celsius of 100 mmĀ²/s, notably higher than the ISOFLEX product. The NLGI grade is 1-2, with worked penetration between 290 and 320. Its operating temperature range is minus 40 degrees Celsius to 160 degrees Celsius, with a dropping point at or above 250 degrees Celsius. The four-ball welding load exceeds 4,000 N. Corrosion protection achieves Emcor 0-0 in distilled water and 0-1 in 3 percent NaCl. This SEW-Eurodrive approved grease is designed for highly loaded plain and roller bearings in mining equipment, gear motors, and centralised lubrication systems for belt conveyor plants.
Comparison Notes
Both products offer wide temperature windows. ISOFLEX TOPAS NB 52 reaches minus 50 degrees Celsius versus minus 40 for the FUCHS product, while RENOLIT CX-TOM 15 extends to 160 degrees Celsius continuous versus 120 for the KLUBER grease. Thickener chemistries differ: barium complex versus calcium sulphonate complex. Users substituting should verify that the base oil viscosity difference (30 versus 100 mmĀ²/s at 40 degrees Celsius) is acceptable for their bearing speed and load conditions.
Pair 2: Staburags NBU 12 to RENOLIT EP 2
Staburags NBU 12 (KLUBER)
Staburags NBU 12 is a mineral oil-based, barium complex soap grease for long-term lubrication of rolling and sliding bearings in demanding environments. It has a brown colour with NLGI Grade 2 consistency (worked penetration 285 to 315). The base oil viscosity at 40 degrees Celsius is approximately 220 mmĀ²/s, with 18 to 19 mmĀ²/s at 100 degrees Celsius. Its operating range spans minus 20 to 130 degrees Celsius, with a dropping point of at least 220 degrees Celsius and a speed factor of approximately 350,000 mm/min. It demonstrates exceptional water resistance and tolerates dilute acids and alkalis. Applications include textile machinery bearings, water pumps, paper-making equipment, marine deck equipment, and power station auxiliary equipment.
RENOLIT EP 2 (FUCHS)
RENOLIT EP 2 is a lithium soap grease based on highly refined mineral oil with heavy metal-free EP additives. It is brown to dark brown with a smooth texture and NLGI Grade 2 consistency (worked penetration 265 to 295). Base oil viscosity at 40 degrees Celsius is approximately 230 mmĀ²/s, closely matching Staburags NBU 12. Its operating range is minus 30 to 130 degrees Celsius, with a dropping point of at least 180 to 190 degrees Celsius. The four-ball weld load is approximately 2,800 N, water resistance is rated at 1-90, and corrosion protection achieves Emcor 0-0. Widely adopted as a plant-wide standard for general industrial machinery, automotive chassis points, bearings, and centralised lubrication systems.
Comparison Notes
These products share similar base oil viscosity ranges and NLGI grades, making RENOLIT EP 2 a practical alternative for general industrial bearing applications. Both offer good water resistance and EP performance. Key differences: thickener system (barium complex versus lithium) and dropping point. The barium complex thickener contributes to stronger performance in wet, chemically aggressive environments. For applications involving continuous water immersion or chemical exposure, review the original specification before substitution.
Pair 3: Klubersynth UH1 6-100 to CASSIDA Fluid HF 32
Klubersynth UH1 6-100 (KLUBER)
Klubersynth UH1 6-100 is a fully synthetic, polyglycol-based gear oil for food-processing, pharmaceutical, cosmetics, and animal feed industries. It is NSF H1 registered and ISO 21469 certified. ISO viscosity grade is 100, with kinematic viscosity at 40 degrees Celsius of approximately 100 mmĀ²/s and at 100 degrees Celsius of approximately 19.5 mmĀ²/s. The viscosity index is at least 190. Operating range spans minus 35 to 160 degrees Celsius. It delivers high scuffing load capacity and micropitting resistance (GFT of at least 10 per FVA 54/7). It is optimised for worm gears with steel and bronze pairings and carries OEM approvals from Siemens-Flender, SEW Eurodrive, Getriebebau Nord, Lenze, Bonfiglioli, and Sumitomo. Not miscible with mineral oils; thorough flushing is required when converting.
CASSIDA Fluid HF 32 (FUCHS)
CASSIDA Fluid HF 32 is a fully synthetic, food-grade hydraulic fluid, also NSF H1 registered and ISO 21469 certified, meeting DIN 51524 HLP and HVLP. ISO viscosity grade is 32, with kinematic viscosity at 40 degrees Celsius of 32 mmĀ²/s and at 100 degrees Celsius of approximately 6.0 to 6.1 mmĀ²/s. Viscosity index is approximately 140. Operating range: minus 60 to 140 degrees Celsius continuous. Performance features include excellent water separation, air release and anti-foam properties, high oxidation resistance, and a neutral odour and taste profile. Engineered for hydraulic systems, hydrostatic gears, bearings, circulating oil systems, and light-duty gearboxes in food and beverage processing.
Comparison Notes
This pairing is an application-based cross-reference, not a direct specification match. Klubersynth UH1 6-100 is formulated as a gear oil at ISO VG 100, while CASSIDA Fluid HF 32 is a hydraulic fluid at ISO VG 32. Both are NSF H1 registered synthetic fluids for food and beverage processing. For heavily loaded worm gears requiring an ISO VG 100 or higher gear oil, CASSIDA Fluid HF 68 or HF 100 would be closer viscosity equivalents from the FUCHS range. Both manufacturers offer NSF H1 registered synthetic fluids with comparable certification profiles for the food industry.
Pair 4: Kluberplex BEM 41-132 to RENOLIT MP 2
Kluberplex BEM 41-132 (KLUBER)
Kluberplex BEM 41-132 is a high-temperature rolling bearing grease using a blend of synthetic hydrocarbon oil and mineral oil, thickened with a special lithium complex soap. It is yellow with NLGI Grade 2 consistency (worked penetration 265 to 295). Base oil viscosity at 40 degrees Celsius is approximately 120 mmĀ²/s, and approximately 14 mmĀ²/s at 100 degrees Celsius. Its operating range spans minus 40 to 150 degrees Celsius, with a dropping point of at least 250 degrees Celsius. The speed factor of approximately 1,000,000 mm/min supports high-speed bearing applications. In the FAG FE9 bearing test at 150 degrees Celsius, 6,000 rpm, and 1,500 N axial load, it achieves an F50 life of at least 100 hours. Applications include tapered, cylindrical, and spherical roller bearings, paper machine dry sections, electric motors, wind power generators, and vehicle clutch and fan bearings.
RENOLIT MP 2 (FUCHS)
RENOLIT MP 2 is a lithium soap grease based on highly refined mineral oil of the 12-hydroxy stearate type. It is opaque brown with a smooth texture and NLGI Grade 2 consistency (worked penetration 265 to 295). Base oil viscosity at 40 degrees Celsius is approximately 100 to 103 mmĀ²/s, with approximately 11.5 to 11.6 mmĀ²/s at 100 degrees Celsius. Its operating range is minus 30 to 120 degrees Celsius, with a dropping point of at least 177 degrees Celsius. It meets several OEM specifications including MB-FREIGABE 267.0 and passes the SKF R2F Rig test. Typical applications include electric motor bearings, passenger car and commercial vehicle lubrication points, and general industrial bearings with efficient seals.
Comparison Notes
Both products use lithium soap thickener technology, share NLGI Grade 2, and have comparable base oil viscosities. The primary distinction: the KLUBER product uses a lithium complex soap, providing a higher dropping point (250 versus 177 degrees Celsius) and an extended high-temperature ceiling (150 versus 120 degrees Celsius). For general industrial bearings below 120 degrees Celsius, RENOLIT MP 2 is a practical alternative. For applications consistently above 120 degrees Celsius, such as paper machine dry sections, a lithium complex grease from the FUCHS RENOLIT DURAPLEX or RENOLIT LX EP families would be more appropriate.
Thickener Compatibility and Base Oil Considerations
When substituting greases, thickener compatibility is critical. Mixing incompatible thickener types can cause excessive softening, oil separation, or loss of mechanical stability, leading to bearing failure. Lithium and lithium complex greases are generally compatible. Calcium sulphonate complex greases should be handled with care when mixed with barium complex or lithium soap greases. Barium complex greases have reasonable compatibility with lithium types but should not be assumed universal. When changing greases, purge as much old product as possible before applying the new one.
Base oil type and viscosity influence film thickness, load-carrying capacity, and low-temperature behaviour. Synthetic base oils offer wider temperature ranges, better oxidation resistance, and longer service life than mineral oils, at higher cost. When cross-referencing from synthetic to mineral, verify temperature and service life requirements are still met. Moving from mineral to synthetic may allow extended relubrication intervals where operationally justified.
Important Disclaimer
The cross-reference information in this guide is for preliminary evaluation purposes only, based on publicly available technical data sheets and general industry knowledge at the time of writing. This guide does not constitute a guarantee that any two products are functionally identical or universally interchangeable. Lubricant substitution decisions should be reviewed by a qualified engineer or lubrication specialist who understands your specific operating conditions, including load, speed, temperature, environmental exposure, and material compatibility. We recommend consulting the technical services departments of both KLUBER Lubrication and FUCHS Lubricants to confirm suitability. Obtain and review current technical and safety data sheets for any product you intend to use. Conduct a controlled field trial when possible, particularly for critical equipment. KOEED provides this information as a resource and accepts no liability for equipment damage, performance issues, or safety incidents arising from substitution decisions. Product names and trademarks are the property of their respective owners.
Key Takeaways
Cross-referencing industrial lubricants requires evaluating thickener type, base oil viscosity, NLGI grade, temperature range, additive package, and OEM approvals rather than matching product names alone. ISOFLEX TOPAS NB 52 and RENOLIT CX-TOM 15 share wide temperature ranges but differ in thickener chemistry. Staburags NBU 12 and RENOLIT EP 2 are practical alternatives for EP bearing applications with comparable base oil viscosity. Klubersynth UH1 6-100 and CASSIDA Fluid HF 32 both serve food-grade synthetic fluid roles with comparable NSF H1 certifications, though ISO viscosity grades differ. Kluberplex BEM 41-132 and RENOLIT MP 2 are lithium-based NLGI 2 greases for general bearing use, with the KLUBER product offering a wider high-temperature range. Always verify thickener compatibility and consult manufacturer technical support before finalising any substitution.
KOEED Support
For assistance with industrial lubricant selection, product sourcing, or technical enquiries, please contact the KOEED support team. We provide guidance on lubricant cross-referencing, application troubleshooting, and supply chain alternatives. Reach us at Moritta@KOEED.COM.