Typical Physical Characteristics

PROPERTIES

 

BMS 3-33A

TYPICAL

Oil type

 

Synthetic

Synthetic

 

 

 

hydrocarbon/Ester

hydrocarbon/

 

 

 

 

Ester

 

 

 

 

Thickener type

 

Lithium

Lithium

 

 

 

Complex

Complex

 

 

 

 

Base oil viscosity

mm2/s

 

 

@

–40°C

 

1840

@

40°C

 

14.2

@ 100°C

 

3.4

 

 

 

 

Useful operating temperature

–73 to +121

–73 to

range

°C

 

 

 

 

+121

 

 

 

 

Drop point

°C

216

 

 

 

Worked penetration @ 25°C

265 to 315

297

 

 

 

Unworked penetration @ 25°C

290

 

 

 

 

 

Bomb oxidation pressure drop

 

 

 

 

from 758 kPa (110 psi) @ 99°C

 

 

@ 100 hr

kPa (psi)

70 (10) max

3.5 (0.5)

@ 500 hr

kPa (psi)

105 (15) max

34 (5)

 

 

 

Oil separation @ 100°C,

 

 

30 hr

%m

2.0

 

 

 

Water resistance test loss

 

 

(79°C)

%m

7.5 max

< 6

 

 

 

 

Evaporation loss,

 

 

 

500 hr @ 121°C

%m

10 max

< 10

 

 

 

 

Mean Hertz Load

kg

60

 

 

 

Antifriction bearing performance

 

 

@ 121°C

hrs

1200 +

 

 

 

Copper corrosion 24 hrs @

 

 

100°C

 

Must pass

Passes

 

 

 

Bearing protection 2 days @

 

 

52°C

 

Must pass

Passes

 

 

 

 

Colour

 

Blue-green

Green

 

 

 

 

 

 

Specifications

U.S.

Approved MIL-PRF-23827C (Type I)

 

British

 

 

French

 

 

Russian

 

 

NATO Code

G-354

 

 

Joint Service Designation

 

 

Boeing

Approved BMS 3-33A

AeroShell Grease 33 is a synthetic universal airframe grease composed of a lithium complex thickened synthetic base oil with corrosion and oxidation inhibitors and load carrying additives.

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