Variable speeds, start-stop cycles and high loads demand more than most greases can deliver. Grease HS2 protects across your full operating range.
Drive shaft bearing grease: consistent protection across variable and high speeds
Most bearing greases are formulated for one primary operating condition, whether that is high speeds, very low speeds, or very high loads. Drive shaft applications do not have one primary operating condition. They are a combination of tough and variable demands simultaneously: high speeds, low speeds, start-stop cycles and shock loads. With a typical bearing grease, you are trying to hit a target that is constantly moving.
Drive shaft bearings operate across a wide speed range, from standstill and slow start-up cycles through to sustained high-speed running. At high speeds, a low-viscosity base oil is required to cope with these high speeds and to minimise internal friction. At lower speeds and during start-stop cycles, that same low viscosity provides a lubricating film that is too thin to prevent metal-to-metal contact.
Most greases address one specific area of this range, focussing on high speed performance, or low speed performance, or on performance at medium speeds. The result is inadequate protection precisely when conditions deviate from the focal point, which in drive shaft applications happens at every start-up and stop cycle and increasingly during normal operation too, as machine speeds are continuously adjusted to match process requirements rather than running at a fixed rate.
Interflon Grease HS2 is formulated to maintain consistent protection across the full speed range, without accepting compromised protection at one end of the operating range.
Interflon Grease HS2
How does Interflon Grease HS2 maintain consistent protection across the full speed range?
Grease HS2 maintains consistent protection by addressing the root cause: the mismatch between a fixed viscosity and a variable operating range.
Its adaptive lubricating film adjusts to operating speed. At lower speeds and during start-stop cycles, the film builds increased thickness to ensure sufficient surface separation and absorb the higher contact stress that occurs when rotation is slow or intermittent. At higher speeds, the film thins to minimise internal friction and reduce shear stress on the thickener system, while maintaining the protective barrier that prevents surface damage.
Grease HS2 also carries a balanced combination of AW, EP and friction modification chemistry enforced by our MicPol® technology, providing appropriate protection whether the dominant condition is high-speed running, low speeds during start-stop cycles, high or variable loads, high shock loads at start-up, or variable loads in between. There is no need to select a grease for the most challenging and potentially damaging condition and accept reduced protection and performance elsewhere.
Interflon’s MicPol® technology based on micronisation and polarisation of the lubricant's components, establishes and increases protective and performance qualities of the baseoils and additives. The technology enables them to fill the surface asperities and bond directly to the metal, where they form a protective, durable tribofilm.
What results can you expect with Grease HS2 in drive shaft applications?
Consistent protection across the full speed range means components are no longer exposed to periods of inadequate lubrication during start-up or variable-speed operation. The practical outcomes are measurable.
- Extended bearing service life and reduced replacement frequency, through consistent protection at variable speeds
- Less unplanned downtime, lower maintenance costs and higher output, as extended component life reduces replacement frequency
- More sustainable and economical machine operation, through reduced energy consumption
- Lower inventory complexity, no risk of misapplication and simpler audits, one product across the full range
Frequently Asked Questions about drive shaft bearing lubrication
The most likely cause is insufficient film thickness at lower speeds or during start-stop cycles. A grease optimised for high-speed running typically uses a low-viscosity base oil that provides excellent protection at speed but cannot generate adequate film thickness when rotation slows or stops. At that point, metal-to-metal contact occurs and wear accumulates, even when the relubrication schedule is followed correctly. Grease HS2's adaptive lubricating film maintains sufficient surface separation across the full speed range, including during start-up and slow-speed operation.
Anti-wear (AW) additives form a protective layer on metal surfaces under moderate load and high speed, conditions where the lubricant film is present but thin. Extreme pressure (EP) additives activate under high contact stress, such as shock loads or the conditions that occur during start-stop cycles when the lubricant film is not yet fully established. Most high-speed greases are additivated with AW chemistry only. Drive shaft applications regularly experience both types of contact. Grease HS2 carries balanced AW, EP and friction modification chemistry even further optimised by our MicPol® technology, providing appropriate protection across all operating phases without accepting compromised performance at either end of the operating range.
Component wear in drive shaft bearings accumulates primarily during start-stop cycles and low-speed operation, when conventional greases that focus on medium or high speed operation cannot maintain sufficient film thickness. Grease HS2 addresses this by maintaining adequate surface separation across the full speed range. Interflon Grease HS2 is fortified with MicPol® technology, in which a micronised part of the base oil is polarised to create strong adhesion to metal surfaces. These polarised particles bond directly to the bearing surface, providing optimal surface protection, outstanding adhesion and very long service life, ensuring components are protected continuously, not just under ideal operating conditions. The practical result is a significant reduction in replacement frequency and the process downtime associated with drive shaft bearing replacement.
In many cases, yes. Grease HS2 covers a wide performance range: variable and high speeds, balanced AW and EP protection, and effective performance across a broad temperature range. It is frequently used to consolidate several application-specific greases into a single product, simplifying lubricant management and eliminating the risk of applying the wrong product to the wrong application.
MicPol® is Interflon's proprietary friction-reduction technology, in which a micronised part of the base oil is polarised to create strong adhesion to metal surfaces. These polarised particles bond directly to the bearing surface, providing optimal surface protection, outstanding adhesion and very long service life, remaining effective between lubrication events. In drive shaft applications, where start-stop cycles regularly expose bearing surfaces to conditions where the lubricant film alone is insufficient to prevent wear and surface damage, this means protection is maintained throughout the full operating cycle. The technology is PFAS-, microplastics- and nanotechnology-free.
Find out what Grease HS2 can deliver in your drive shaft application
A single on-site assessment by an Interflon Technical Adviser identifies where the greatest impact can be achieved and what a switch to Grease HS2 would realistically deliver in your situation. Where a pilot is appropriate, it runs with documented outcomes before any broader commitment is required.