THK Original Grease AFF Grease

AFF grease uses high-grade synthetic oil as its base and a lithium-based grease as its consistency enhancer, while also featuring special additives. This gives it excellent anti-fretting and low dustgenerating performance. It also features a level of stable rolling resistance not found in other conventional vacuum and low dust-generating greases.


Features

• Stable rolling resistance

Since the viscous resistance is low, the rolling resistance fluctuation is also low. Thus, superb conformity is achieved at low speeds.

• Low dust generation

It generates very little dust, making it ideal for use under micro-stroke conditions.

• Fretting resistance

Since AFF grease is more resistant to wear from micro-vibrations than other low dust-generating greases, it allows the greasing interval to be extended.

Representative Physical Properties

Item		Representative value	Test method
Consistency enhancer		Lithium-based
Base oil		High-grade synthetic oil
Base oil kinematic viscosity: mm2/s (40°C)		100	JIS K 2220 23
Worked penetration (25°C, 60 W)		315	JIS K 2220 7
Mixing stability (100,000 W)		345	JIS K 2220 15
Dropping point: °C		220	JIS K 2220 8
Evaporation amount: mass% (99°C, 22 h)		0.7	JIS K 2220 10
Oil separation rate: mass% (100°C, 24 h)		2.6	JIS K 2220 11
Copper plate corrosion (B method, 100°C, 24 h)		Accepted	JIS K 2220 9
Low-temperature torque: mN-m (‒20°C)	Starting	220	JIS K 2220 18
	Rotational	60
4-ball testing (welding load): N		1236	ASTM D2596
Service temperature range: °C		‒40 to 120
Color		Reddish brown

Low Dust-Generating Performance Test Data

• AFF Grease Test Data (Comparison of Dust Generation)

 

Item	Description
Tested model	SSR20XW1+280L
Grease quantity	1.2cm3(initial lubrication only)
Amount of air supplied	0.3ℓ/min
Feeding speed	500mm/s
Stroke	200mm

Rolling Resistance Characteristics at Low Speed

Item	Description
Tested model	HSR35RC0+440LP
Grease quantity	4cm3 (initial lubrication only)
Feeding speed	1mm/s
Stroke	3mm