Learn how NLGI 3 wheel bearing grease handles heat and heavy loads. Explore PALCO Ruby Gel and enquire today.
A family SUV is coming down a winding ghat road after a weekend trip. The driver is on the brakes again and again, bend after bend. Behind each wheel, the brake discs and drums are getting hot, and that heat is creeping straight into the wheel hubs.
Most drivers never think about what happens inside those hubs. But the wheel bearings are spinning under the full weight of the vehicle, soaking up that heat, while the grease inside works to keep them from wearing out.
The same thing happens to loaded trucks on hill routes, buses in stop-start city traffic, and tractors hauling trailers on farm roads. Ruby Gel Grease from PALCO is a wheel bearing grease designed for these demanding conditions. This article explains what it is, how it works, and why heat resistance matters.
NLGI 3 wheel bearing grease is a firmer grease grade used in suitable bearing applications where the specified consistency and lubrication performance matter. PALCO Ruby Gel is a lithium-complex grease formulated for automotive wheel bearings, with heat resistance and extreme pressure (EP) protection among its key characteristics.
What Is Ruby Gel? A Long-Life Wheel Bearing Grease
Ruby Gel is a premium NLGI 3 lubricating gel grease made by Paras Lubricants Limited under the PALCO brand. It has a transparent red appearance and a smooth, buttery structure.
It is built from an optimised combination of three ingredients:
- High-performance base oils, which provide the lubricating film
- Lithium-complex thickener technology, which gives the grease its structure and heat resistance
- Performance additives, including extreme pressure (EP) protection against sudden shock loads
Ruby Gel is recommended for automotive wheel bearings on passenger vehicles, commercial vehicles, off-highway equipment, and farm equipment, subject to the application’s lubrication requirements.
Ruby Gel is an NLGI 3 grade grease. Its key published characteristics include a minimum drop point of 260°C, a minimum base oil viscosity of 220 cSt at 40°C, and a minimum four-ball weld point of 315 kgf.
How NLGI 3 Wheel Bearing Grease Handles Heat
Wheel bearing grease has a tough job. It must stay in the hub, help maintain a lubricating film between the rollers and races, and withstand repeated heating and cooling, mile after mile.
What Is Lithium-Complex Grease?
A grease is oil held in a thickener, a little like water held in a sponge. Lithium-complex thickeners are generally selected for applications where improved heat resistance is important compared with conventional lithium grease. The performance of a finished grease also depends on its base oil, additives, formulation, and operating conditions.
What Is the Drop Point of Grease?
Drop point is the temperature at which grease begins to soften enough to flow through the test opening under specified test conditions. Ruby Gel’s published minimum drop point is 260°C.
This is not the temperature at which a grease should be operated. It is a laboratory measure of the grease’s high-temperature characteristics. A high drop point helps explain why heat resistance is an important consideration when choosing wheel bearing grease for demanding applications.
How Does Grease Protect Metal Surfaces?
NLGI 3 wheel bearing grease has a firmer consistency than the commonly used NLGI 2 grade. However, the correct grease grade depends on the bearing design, operating conditions, and the vehicle manufacturer’s specifications. Always confirm that NLGI 3 grease is suitable for the intended application.
How Does a Strong Lubricating Film Protect Bearings?
Ruby Gel’s published minimum base oil viscosity is 220 cSt at 40°C. In simple terms, this relatively high viscosity helps the oil form a lubricating film between rollers and races under suitable operating conditions. Its extreme pressure (EP) additives provide additional protection under high-load conditions.
Ruby Gel’s published four-ball weld point is a minimum of 315 kgf. This is a laboratory test result that indicates the grease’s load-carrying performance under the specified test conditions; it is not a direct measure of the load capacity of a vehicle’s wheel bearing.
Key Benefits of PALCO NLGI 3 Wheel Bearing Grease
Very Long Service Life
Ruby Gel is promoted for a service interval of up to 130,000 km under ideal road conditions. PALCO states that it provides satisfactory performance up to 130,000 km under ideal prescribed conditions.
Actual service intervals depend on loads, roads, driving style, maintenance practices, and the vehicle manufacturer’s recommendations. Always follow the prescribed inspection and service schedule for the vehicle and bearing assembly.
Resistance to Heat During Heavy Braking
High thermal stability is one of the characteristics highlighted for Ruby Gel. For vehicles travelling on hill routes or operating in dense city traffic, heat resistance is an important factor when selecting suitable wheel bearing grease.
Long descents on hill roads to popular holiday destinations are a familiar example, where brakes may be applied repeatedly over extended distances.
Stability Across a Wide Range of Temperatures
Ruby Gel is designed for applications that require temperature stability and shear resistance. Shear stability refers to a grease’s ability to maintain its consistency when subjected to mechanical working inside a bearing.
Actual performance depends on the operating temperature, bearing design, lubrication conditions, and application requirements.
Protection Against Shock Loads
Potholes, speed breakers, and heavily loaded trips can expose wheel assemblies to sudden shocks. Ruby Gel’s EP additives are intended to provide additional protection under high-load conditions.
Its published four-ball weld point is a minimum of 315 kgf, a laboratory measure of load-carrying performance under the specified test conditions.
Water Resistance and Corrosion Protection
Water resistance and corrosion protection are important characteristics for grease used in applications exposed to moisture. These properties can help protect bearing surfaces when the product is suitable for the operating conditions.
Waterlogged streets and splashing from passing vehicles are a daily reality for many drivers during the monsoon. However, the grease should not be treated as a substitute for sound seals or proper bearing maintenance.
Compatibility with Seals
Seal compatibility matters because wheel hubs rely on seals to help retain grease and keep dirt and moisture out. The suitability of a grease for a particular seal material should be confirmed against the product’s technical guidance and the equipment manufacturer’s requirements.
Applications of PALCO Ruby Gel Wheel Bearing Grease
Passenger Cars and SUVs
For family cars and SUVs that face city traffic one day and hill drives the next, a suitable wheel bearing grease must meet the bearing manufacturer’s requirements for consistency, temperature performance, and lubrication.
PALCO Ruby Gel is recommended for automotive wheel bearing applications where its NLGI 3 consistency and published performance characteristics are suitable.
Commercial Vehicles
Trucks, buses, and delivery vehicles cover long distances and may operate under heavy loads. Choosing a suitable wheel bearing grease and following the prescribed maintenance schedule can help fleets manage bearing maintenance and vehicle downtime.
For a fleet owner, reducing avoidable servicing and breakdowns helps keep vehicles on the road and working efficiently.
Off-Highway and Farm Equipment
Tractors, trailers, and off-highway equipment work on rough, dusty, and often wet ground. Ruby Gel is recommended for wheel bearing applications on these machines where the grease meets the equipment’s requirements.
During harvest season, a tractor sidelined by a wheel bearing problem can cost far more than the repair itself.
Why Choose PALCO Ruby Gel Grease?
Paras Lubricants Limited was incorporated in 1985 and has more than four decades of experience in lubricants. Its head office is in Delhi; it has a western office in Mumbai, and its lubricants are manufactured at its plant in Daman.
PALCO offers more than 1,500 products across automotive oils, industrial oils, greases, and auto care products and exports to more than 25 countries. Its manufacturing follows ISO 9001-certified quality management systems, and its in-house R&D facilities support product quality and testing.
Ruby Gel is available in 180 kg, 18 kg, 7 kg, 5 kg, 3 kg, 2 kg, 1 kg, and 500 g packs, according to PALCO’s product information. These sizes can suit different workshop and bulk-supply requirements. PALCO’s team can help customers identify a suitable grade and pack size for their application.
Practical Tips for Using Wheel Bearing Grease
These general tips help wheel bearing grease perform as intended. The vehicle and bearing manufacturer’s recommendations should always come first.
Check Grease Compatibility
Before topping up or repacking a bearing, confirm the existing grease type and the compatibility recommendations for the replacement grease. Mixing greases with different thickener systems can affect performance. Do not assume that two greases are compatible simply because both are lithium-based.
Follow the Correct Bearing Service Procedure
For serviceable bearings, follow the vehicle or bearing manufacturer’s cleaning and repacking procedure before applying fresh grease. Do not dismantle, clean, or repack sealed-for-life bearings unless the manufacturer specifically permits it.
Removing old grease, dirt, and moisture where servicing is permitted helps reduce contamination during repacking.
Apply the Correct Grease Quantity
Pack the bearing according to the manufacturer’s procedure, and do not overfill the hub. Excess grease can increase churning and heat generation in some applications or contribute to seal leakage. Follow the prescribed quantity and assembly instructions.
Store Grease Properly
Keep containers tightly closed and stored in a cool, dry, covered place. Wipe the lid before opening and use a clean tool so dust does not find its way into the grease.
Recognise Signs of Wheel Bearing Problems
A humming or grinding noise, a hub that runs hotter than expected, or grease leaking from a seal can indicate that a wheel bearing or its lubrication system needs attention.
These symptoms can have several causes, so inspect the assembly and follow the vehicle manufacturer’s maintenance guidance rather than assuming that grease replacement alone will resolve the issue.
Choosing the right NLGI 3 wheel bearing grease depends on the bearing design, operating conditions, and manufacturer recommendations. PALCO Ruby Gel combines a lithium-complex thickener, a firm NLGI 3 consistency, a published minimum drop point of 260°C, and EP protection for suitable automotive wheel bearing applications. Explore the product details and available packs, or contact PALCO to discuss your lubrication requirements.
