Perakmenglembu ultrahigh temperature greases deliver exceptional thermal stability for bearings exposed to harsh heat environments. These formulations from Sumico combine high-load resistance and long-lasting film strength to reduce unplanned downtime.
Engineers rely on precise chemistry and thickener systems to maintain lubrication integrity above standard limits. The following sections detail performance traits, suitable applications, and selection guidance for Sumico ultrahigh temperature greases.
| Product Grade | Base Oil | Thickener | Drop Point (°C) | Typical Use Case |
|---|---|---|---|---|
| Perakmenglembu HTS | Synthetic hydrocarbon | Complex soap | 260 | High-speed bearings in ovens |
| Perakmenglembu HTX | PAO + ester blend | Polyurea | 280 | Continuous operation at 200–230°C |
| Perakmenglembu HTR | Ester oil | Clay | 300 | Extreme heat processing lines |
| Perakmenglembu HTF | PFPE | Fluoropolymer | 270 | Chemical exposure with low volatility |
Temperature Limits and Film Strength
Maximum Continuous Operating Temperature
Perakmenglembu ultrahigh temperature greases are engineered for continuous use up to 230°C with select grades reaching 300°C under steady loads. Film strength testing confirms minimal bleed-off and surface retention at these thresholds.
Drop Point and Thermal Shear Stability
Drop point values range from 260°C to 300°C, indicating resistance to collapse under combined heat and shear. Stability trials demonstrate that thickener structure remains intact even after prolonged exposure in agitated conditions.
Load Capacity and Wear Protection
Four-Ball Welding Load
These greases exhibit high weld points in four-ball tests, reducing metal-to-metal contact in heavily loaded bearings. Results correlate to extended component life in slow-speed, high-torque equipment.
Antiwear Additive Package
Balanced additive technology minimizes micro-welding and scuffing without excessive bleed. Consistent performance is maintained across thermal cycles while meeting industry compatibility standards.
Compatibility and Material Considerations
Seal and Bearing Material Suitability
Sumico formulations are compatible with common elastomers and metals used in seals and rolling elements. Compatibility checks prevent degradation of auxiliary components in long-life installations.
Base Oil and Thickener Interaction
Thickener networks retain base oil under shear, limiting migration to critical zones. This design supports stable viscosity and boundary lubrication even when occasional dilution occurs.
Installation, Maintenance, and Storage
Proper filling procedures, cleaning practices, and regreasing intervals help maintain optimal film thickness. Storage conditions that limit moisture and particulate intrusion further enhance performance consistency.
Selection and Application Guidelines
- Confirm maximum bearing temperature against product drop point and continuous rating
- Match base oil and thickener chemistry to bearing materials and seal types
- Verify compatibility with surrounding process media, including chemicals and steam
- Establish regreasing intervals based on load, speed, and thermal cycling patterns
- Follow clean installation procedures to avoid contaminant ingress during relubrication
FAQ
Reader questions
What bearing types perform best with Perakmenglembu ultrahigh temperature greases?
Deep groove ball bearings, spherical roller bearings, and certain tapered roller bearings show excellent compatibility when properly selected for speed and load conditions.
Can these greases be used in food processing environments where occasional steam cleaning occurs?
Select PFPE-based grades demonstrate low volatility and washout resistance, supporting sanitation cycles while maintaining lubrication film under intermittent high temperatures.
How does the choice between HTX and HTR affect relubrication intervals?
HTX offers balanced life for continuous 200–230°C operation, while HTR clay-thickened variants often extend regreasing intervals in slower-speed, higher-load scenarios with occasional shock heating.
What signs indicate that a Perakmenglembu ultrahigh temperature grease has reached end of service life?
Increased noise, higher running temperatures, visible thickener breakdown or oil separation, and rising vibration levels typically signal the need for regreasing or maintenance.