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AO-Oil / AO-Grease

AO-Oil AO-Grease

Watch lubricant is generally applied to watch movements during the manufacturing process.

As it ages, however, lubricant can cause watches to malfunction or stop entirely by gumming up, by corroding metal parts or by sticking to plastic parts.

AO-Oil・AO-Grease is a lubricant that Citizen Watch developed in-house specifically to solve these problems.

What does AO-Oil do ?

1 Inhibits corrosion of metal and plastic parts
2 Stops clogging or thickening (maintains long-lasting lubricity)
3 Inhibits viscosity dependence on temperature (enhances energy efficiency and expands operating temperature range)

What makes AO-Oil and
AO-Grease special ?

1 Long-lasting with durability of 20-plus years
2 High corrosion resistance
3 High versatility: suitable for both engineering plastics and metals
4 Grease types: paste (AO-G08) and semi-solid (AO-G09)

Used for many years in MIYOTA watch movements, AO-Oil and AO-Grease have earned the trust of our customers with their consistently high quality. They can be used not just for watch movements and parts, but also for other precision components due to their exceptional quality and performance.

AO-Oil: Technical description

Item	Unit	AO-2 (Low viscosity)	AO-3 (Medium viscosity)	AO-V (High viscosity)
Appearance		Clear	Blue	Red
Density	g/m	0.83	0.83	0.83
Kinematic vicosity at -30 degree	mm2/sec	1,700	6,800	14,600
Kinematic vicosity at 0 degree	mm2/sec	170	550	1,050
Kinematic vicosity at 20 degree	mm2/sec	60	170	300
Kinematic vicosity at 40 degree	mm2/sec	25	70	120
Kinematic vicosity at 80 degree	mm2/sec	8	20	30
Kinematic vicosity at 100 degree	mm2/sec	5.3	12	18.5
Viscosity index		More than 140	More than 170	More than 170
TAN	mgKOH/g	Less than 0.15	Less than 0.15	Less than 0.15
Flash point	degree	More than 230	More than 230	More than 230
Pour point	degree	Less than -40	Less than -40	Less than -40
Surface Tension	mN/m	29	29	29
Vaporability	wt%	0.01	0.01	0.01
Hygroscopicity	wt%	0.05	0.05	0.05
Heat resistance(120 degree/96h)		No change	No change	No change