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ROYCO® 555 Synthetic Helicopter Transmission & Turbine Engine Oil

ROYCO® 555 Synthetic Helicopter Transmission & Turbine Engine Oil

Use the very best lubricating oil for your gas turbine engine or helicopter transmission. ROYCO® 555 synthetic helicopter transmission and turbine engine oil uses a blend of "hindered" poly esters and a technologically advanced additive package to improve load carrying performance, corrosion protection, anti-wear and exceptional thermal-oxidative stability. ROYCO 555 meets U.S. military specification DOD-PRF-85734 (it superseded DOD-L-85734 (AS)) and U.K. DERD.2497 and XAS-2354. So if you're looking for DOD-L-85734 oils, you've come to the right place.

It is commercially approved for use in gearboxes, transmissions and gas turbine engines built by Pratt & Whitney, Pratt & Whitney Canada, CFM International, Rolls Royce, Allison, General Electric and others, in addition to Garrett and Sunstrand accessories.

It is also approved for use by these aircraft manufacturers: Boeing Vertol, Bell Helicopter, Eurocopter/Aerospatiale, Textron, Hughes/McDonnell Douglas, Agusta, Sikorsky, MBB and Westland helicopter transmissions.

Read the ROYCO 555 MSDS document for safety information.

APPLICATIONS

ROYCO 555 was specifically developed for use in high performance gas turbine engines developed during the mid 1960's for the SST and Concorde. These advanced engines required a lubricant having good high temperature stability as well as extreme pressure load carrying capability. ROYCO 555 was developed for the demands of increasingly higher power output engines that subsequently develop higher operating temperatures and loads. It was also designed to give enhanced performance in current engines.

ROYCO 555 was also formulated to meet the requirements of helicopter gearbox and transmission systems. A high load carrying oil such as ROYCO 555 is necessary to meet the load requirements and reliability demands of those systems. More recently with the need to transmit more power and higher loads through helicopter gearbox and transmission systems, extensive evaluation by helicopter airframe manufacturers has demonstrated this improved load carrying ability which has resulted in improved performance - particularly by increased time between overhaul (TBO.) This oil should only be used in applications where synthetic oils have been specified or in systems expressly designed for synthetic lubricants.

NOTE: ROYCO 555 should not be used with silicone-based elastomers.

Specifications
PROPERTIESSPECIFICATIONTYPICAL
Viscosity, cSt
      @ 210°F
      @ 100°F
      @ -40°F

5.0-5.5
25 min
13,000 max

5.40
29.5
10,500
Pour Point, °F-65 max-70
Flash Point, °F (C.O.C.)475 min508
Neutralization Number0.5 max0.3
Synthetic Rubber
      Swell "H" (72 hrs/158°F), %
      Swell "F" (72 hrs/400°F), %

5.0-25.0
5.0-25.0

12.5
14.7
Thermal Stability (96 hrs/525°F)
      Viscosity; @ 100°F, % Change
      Acid Number Change, mg KOH/g
      Metal Weight Change, mg/cm2

5.0 max
6.0 max
+/- 4.0 max

1.3
2.5
0.40
Corrosion Stability (72 hrs/400°F)
      Steel, wt. change, mg/cm2
      Silver, wt. change, mg/cm2
      Aluminum, wt. change, mg/cm2
      Magnesium, wt. change, mg/cm2
      Copper, wt. change, mg/cm2

+/- 0.2 max
+/- 0.2 max
+/- 0.2 max
+/- 0.2 max
+/- 0.2 max

0.02
0.02
0.01
0.03
0.05
Oxidation Stability (72 hrs/400°F)
      Viscosity Change @ 100°F, %
      Total Acid Number Change
      Contamination, mg/100 ml

-5 to +25 max
3.0 max
50.0 max

12.5
0.6
0.9
Load Carrying Capacity, Ryder Gear @ 165°F
      Scuff Rating, lb/in2
    Relative Rating, %

Typical
Typical

3835
155
Sediment, 1.2 micron filter, mg/L10 max2.0
Foaming, ml initial/ml final
      Seq I @ 77 °F
      Seq II @ 200°F
      Seq III @ 77°F

25/0
25/0
25/0

nil
nil
nil
Specific Heat, Cp
      @ 37.8°C
      @ 260 °C

Typical
Typical

0.466
0.618
Dynamic Rust Test, synthetic sea water
      Degree of rusting, 60°C, 24 hrs

None

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Part Number
4055833Q
Size
Quart Can
Spec
DOD-PRF-85734
Price
$15.71
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Qty
Certification
Same Day Ship
Material Safety Data Sheet:
MSDS1
Country of Origin: USA
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Part Number
4055833C
Size
24 Quart/Case
Spec
DOD-PRF-85734
Price
$352.52
Qty
Certification
Material Safety Data Sheet:
MSDS1
Country of Origin: United States
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Part Number
4055832
Size
5 Gallon Steel Pail
Spec
DOD-PRF-85734
Price
$293.08
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Qty
Certification
Material Safety Data Sheet:
MSDS1
Country of Origin: USA
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Part Number
4055831
Size
55 Gallon Steel Drum
Spec
DOD-PRF-85734
Price
$2,853.66
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Need Lift Gate with Delivery?:
Qty
Certification
Material Safety Data Sheet:
MSDS1
Country of Origin: USA
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