PETAMO GHY 441 vs Mobilith SHC 220: Selecting the Right Heavy-Duty Grease for Yo

PETAMO GHY 441 vs Mobilith SHC 220: Selecting the Right Heavy-Duty Grease for Your Application

Selecting a heavy-duty bearing grease is not simply a matter of picking the one with the widest temperature range or the most familiar brand name. Two products that frequently appear on the same shortlist are KLUBER PETAMO GHY 441 and Mobilith SHC 220. Both are lithium-complex greases designed for demanding industrial environments, yet their underlying chemistries differ in ways that have real consequences for equipment performance, relubrication intervals, and long-term reliability. This article examines the technical distinctions between these two greases across five critical dimensions—base oil type, temperature capability, extreme-pressure additive chemistry, water resistance, and practical application fit—so that maintenance engineers and procurement specialists can make an informed choice based on their specific operating conditions. Neither product is universally superior; each excels in different scenarios, and understanding where the boundaries lie is the key to getting the most value from your lubrication program.

Technical Specification Comparison

Note: Data drawn from publicly available manufacturer technical data sheets. Values typical; consult the current datasheet for your specific production batch.

Detailed Analysis of Key Performance Dimensions

1. Base Oil: Mineral vs PAO Synthetic

The most fundamental difference between these two greases lies in the base oil. PETAMO GHY 441 uses a high-quality mineral base oil with a viscosity of approximately 400 mm²/s at 40°C. This relatively high viscosity provides a robust lubricating film under heavy loads and at elevated temperatures, which is one reason the grease performs well in slow-speed, high-load applications such as rolling mill bearings and mining equipment. The mineral oil base also contributes to the grease's naturally strong adherence to metal surfaces, an important property where mechanical shock or vibration could otherwise displace the lubricant.

Mobilith SHC 220, by contrast, is built on a PAO synthetic base oil with a viscosity of 220 mm²/s at 40°C. The synthetic foundation delivers several inherent advantages: superior oxidation resistance at elevated temperatures, a naturally higher viscosity index (meaning less viscosity change across the temperature spectrum), and significantly better low-temperature fluidity. The lower base oil viscosity also makes SHC 220 well suited to higher-speed applications where churning losses and heat generation from viscous drag need to be kept in check. The trade-off is that the lighter oil film may provide less margin under extreme shock loading compared to a higher-viscosity mineral formulation.

2. Temperature Range and Thermal Behaviour

Temperature capability is often the first parameter engineers check, and here the two products reveal complementary strengths. PETAMO GHY 441 is rated for continuous service from -20°C up to +160°C. The upper limit of 160°C is noteworthy: it reflects the thermal stability of the lithium-complex thickener combined with the mineral base oil's resistance to thermal degradation. At the low end, however, -20°C is a practical boundary; below this, the mineral oil's naturally higher pour point means the grease stiffens and may not flow adequately in centralised lubrication systems or allow clean bearing startup.

Mobilith SHC 220 operates from -40°C to +150°C. The PAO base oil's exceptionally low pour point enables reliable low-temperature performance down to -40°C, making this grease a practical choice for outdoor equipment in cold climates, freezer-adjacent machinery, and applications exposed to severe winter conditions without heated enclosures. The upper limit of 150°C, while slightly lower than GHY 441, is still sufficient for the vast majority of industrial bearing applications including electric motor bearings, fan shafts, and pump housings. For applications operating continuously above 150°C, neither product is the appropriate choice — a perfluoropolyether (PFPE) grease would typically be indicated.

3. Extreme-Pressure (EP) and Anti-Wear Additives

Both greases carry EP additive packages, but their philosophies differ. PETAMO GHY 441 utilises KLUBER's proprietary additive system designed to work in synergy with its mineral base oil and lithium-complex thickener matrix. The formulation delivers a four-ball weld load typically exceeding 3000 N, reflecting substantial load-carrying reserve. This EP performance is particularly relevant in applications such as steel mill work rolls, mining shovels, and heavy construction machinery where shock loading, vibration, and boundary lubrication conditions are routine. KLUBER's approach emphasises a balance between chemical EP activity (additives that react with the metal surface under extreme pressure to form a sacrificial protective layer) and the physical load-carrying contribution of the high-viscosity base oil film itself.

Mobilith SHC 220 employs a sulphur-phosphorus EP additive system that activates under mixed and boundary lubrication regimes to protect against adhesive wear. The four-ball weld load is typically around 2500 N, which is entirely adequate for the product's target applications — electric motors, fans, pumps, and general industrial bearings operating under normal to moderately elevated loads. The additive package is formulated to be compatible with the PAO base oil and to provide effective protection without excessive chemical aggressiveness toward yellow metals such as bronze cage materials sometimes found in older electric motor bearings. This measured EP approach also contributes to SHC 220's versatility across a broad range of industrial applications where extreme shock loading is not the primary design concern.

4. Water Resistance and Corrosion Protection

Water ingress is one of the most common causes of grease-lubricated bearing failure, and both products are engineered to contend with moisture exposure. PETAMO GHY 441 demonstrates strong water resistance, achieving a DIN 51807 rating of 1–90 under static conditions and 2–90 under flowing water conditions. This performance is notable because mineral-oil greases sometimes struggle with water washout — the high base oil viscosity and the cohesive thickener structure in GHY 441 work together to resist displacement. Furthermore, its EMCOR corrosion protection rating of 0/0 with both distilled and salt water indicates that the additive package provides effective surface passivation even in the presence of chlorides, a valuable characteristic for marine, coastal, and washdown environments.

Mobilith SHC 220 achieves a DIN 51807 static water resistance rating of 1–90, reflecting good resistance to water washout. Its EMCOR rating of 0/0 with distilled water and 0/1 with salt water demonstrates very good corrosion protection, though the slight differentiation under salt-water conditions suggests that in persistently corrosive environments, additional attention to sealing and relubrication frequency may be warranted. The PAO base oil's inherently low water solubility is an advantage — synthetic hydrocarbons absorb less water than mineral oils — but the lower base oil viscosity means the physical barrier against water penetration is somewhat less robust than that provided by GHY 441's heavier oil film.

5. Application Fit: Where Each Grease Belongs

PETAMO GHY 441 finds its strongest application fit in heavily loaded, slow-to-moderate-speed industrial bearings where the combination of high base oil viscosity, robust EP performance, and excellent adhesion to metal surfaces delivers tangible reliability benefits. Typical environments include steel rolling mills where bearings face high temperatures, heavy loads, and exposure to scale and water spray; mining conveyor pulleys and crusher bearings subject to shock loading and contamination; cement plant kiln support rollers and grinding mills; and heavy construction machinery such as excavator slew bearings and bulldozer track rollers. The mineral oil base, while limiting low-temperature capability, provides a forgiving lubricant film that tolerates some degree of contamination and boundary-lubrication excursions that would challenge lighter synthetic formulations. GHY 441 is also well regarded in applications involving oscillating motion or frequent starts and stops, where the grease's mechanical stability prevents excessive softening or oil bleed.

Mobilith SHC 220 is optimised for a different set of priorities. Its PAO synthetic base delivers long service life in moderate-to-high-speed applications where oxidation resistance and thermal stability drive extended relubrication intervals. The grease is a natural fit for electric motor bearings across a wide horsepower range, industrial fan and blower shaft bearings, pump bearings (including vertical pump motor upper bearings), and general industrial equipment operating in temperature-controlled environments.

The -40°C low-temperature capability extends the grease's reach to refrigeration compressors, outdoor conveyor systems in cold climates, and ski-lift equipment. Where centralised lubrication systems must deliver grease through long lines in cold ambient conditions, SHC 220's low-temperature pumpability is a practical advantage. The lighter base oil viscosity also keeps energy consumption from fluid friction lower in high-speed spindles and precision bearings — a consideration in energy-intensive continuous-process industries.

Making the Selection: A Decision Framework

Choosing between PETAMO GHY 441 and Mobilith SHC 220 ultimately depends on the operating profile of the specific bearings under consideration. Focus first on the temperature envelope: if the application must start and run at temperatures below -20°C, SHC 220 is the appropriate direction. If the application routinely operates between 150°C and 160°C, PETAMO GHY 441 provides the necessary thermal margin.

Next, evaluate the loading regime: for shock-loaded, slow-speed, heavily contaminated environments, the higher-viscosity, higher-EP GHY 441 typically provides a greater safety factor. For high-speed, clean, temperature-stable environments with moderate loading, SHC 220's synthetic foundation yields longer service intervals and lower frictional energy loss. Speed is equally important: the DN value (bearing bore in mm multiplied by rpm) should guide base-oil viscosity selection.

GHY 441's 400 mm²/s base oil suits lower DN values, while SHC 220's 220 mm²/s oil accommodates higher speeds without excessive heat generation. Water exposure and corrosion risk should also be weighed — in persistently wet, possibly saline conditions, GHY 441's combination of heavy oil film and salt-water EMCOR performance can be advantageous. For centralised lubrication systems, consider both the pumpability at the lowest expected ambient temperature and the maximum line length; SHC 220's synthetic base generally flows more readily through long lines in cold conditions.

Finally, compatibility with existing products must be confirmed: mixing greases with different base oil types (mineral vs PAO) or incompatible thickeners can cause softening or hardening in service. A thorough purge and cleaning protocol is recommended whenever switching between product families.

Key Takeaways

PETAMO GHY 441 and Mobilith SHC 220 are both lithium-complex greases with sound industrial pedigrees, yet they serve distinct operational niches. GHY 441's mineral-oil, high-viscosity, heavy-EP formulation favours the punishing conditions of primary metals, mining, and heavy construction. SHC 220's PAO synthetic base with broad temperature range and excellent oxidation stability makes it a strong candidate for electric motors, fans, pumps, and general industrial machinery, particularly where low-temperature performance or extended service intervals drive value. The right selection is the one that matches the bearing's speed, load, temperature, and contamination profile — not the one with the widest datasheet numbers. When in doubt, consult the bearing manufacturer's lubrication recommendations and consider an on-site trial with condition monitoring to validate performance under your actual operating conditions.

KOEED Technical Support and Availability

As an authorised KLUBER LUBRICATION distributor, KOEED.COM provides technical consultation, product selection support, and worldwide shipping for the full KLUBER specialty lubricants portfolio, including PETAMO GHY 441. Our team can assist with compatibility assessments, lubrication programme audits, and customised recommendations based on your equipment list and operating conditions. For technical enquiries, product data sheets, safety data sheets, or to request a quotation, contact our lubricant engineering support team.

Email: Moritta@KOEED.COM. We support English, Chinese, French, German, Spanish, and Japanese communication for international procurement and technical consultation. KOEED maintains regional logistics partnerships to ensure reliable delivery across Asia, Europe, the Middle East, Africa, and the Americas.