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Royco® 555 is a turbine engine & helicopter transmission oil which meets DOD - PRF - 85734 specifications. NATO Specification: O-160. Joint Service Designation: OX-26.
Royco® 555 is a synthetic-based, 5 cSt turbine engine oil that is formulated for excellent load carrying capacity. Royco® 555 is the premier fluid for use in many helicopter turbines, transmissions and gearboxes.
Royco® 555 is approved commercially in a wide variety of aircraft transmissions, gearboxes and gas turbine engines including: Pratt & Whitney, IAE, CFM International, General Electric, Rolls Royce, RR Allison, Garrett, Motorlet, and Turbomeca. A full list of the detailed applications and equipment that Royco® 555 synthetic turbine engine oil is available upon request.
Product Type: Lubricating Oil
Viscosity (cSt, @210°F): 5.40
Viscosity (cSt, @100°F): 29.5
Viscosity (cSt, @-40°F): 10,300
Flash Point: 508°F (264°C)
Pour Point: -75°F (-60°C)
Primary Chemistry:
Ester
Poor oil lubrication & protection in critical transmissions
Inferior antiwear, corrosion & rust prevention from lubricating oil
Frequent required maintenance intervals and oil top-offs
Royco® 555 is formulated to meet the critical lubrication requirements for aircraft gearboxes and helicopter transmissions. Royco® 555 can also be used safely in gas turbine engines with higher power outputs and difficult temperatures.
Royco® 555 synthetic turbine engine oil meets the performance requirements of several industry & national defense specifications including:
U.S. Military specification: DoD-PRF-85734
U.K DERD.2497
XAS-2354
British DEF STAN 91-100
NATO Code O-160
UK Joint Service Designation OX-26
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