Eastman Halo 157 55USG Drum *MIL-PRF-32538
Eastman HALO 157 is a clear amber colored fluid with a faintly aromatic odor reminiscent of turbine engine oils. It is based on selected polyol esters, the inherent characteristics of which are enhanced by additives.
- Commodity Code 34039900
- Country of Origin United States
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Please Note: Specifications and approvals are subject to change at any time. Users should always consult their AMM or the OEM when selecting products to ensure items have the release needed. Only specifications listed on the order confirmation will be certified on the Silmid CofC.
For many years MIL-PRF-23699 approved engine lubricants were employed in helicopter gearboxes, ensuring a common lubricant for both engines and transmission systems. More recently, high-load-carrying oils have been evaluated and found to offer advantages over conventional-load-carrying MIL-PRF-23699 oils.
These higher-load-carrying oils, complying with specification DOD-PRF-85734, were originally intended only for engine applications. The two MIL spec oils are thus of identical viscometric properties. Operators considered that lubrication performance of gearboxes could be enhanced by a higher-viscosity, high-load-carrying lubricant possessing improved corrosion-protective qualities. Eastman HALO 157 is a clear, amber-colored fluid with a faintly aromatic odor reminiscent of turbine engine oils.
It is based on selected polyol esters, the inherent characteristics of which are enhanced by additives. It is also fully compatible and miscible with other oils approved to specifications MIL-PRF-23699 and MIL-PRF-7808. Multiple tests have been completed in bearing and gearbox rigs and flight evaluations, culminating in the NATO standard (AIR STANDARD ACS 4035) for a 9-cSt advanced helicopter gearbox lubricant.
- Excellent load carrying and antiwear performance
- Excellent shear stability
- Good corrosion resistance
- Good elastomer compatibility
- Greater inter-gear film thickness
- High temperature stability
- Aviation turbine oil (ATO)
- Helicopter oil
- *AIR STANDARD ACS-4035
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