THK Original Grease AFJ Grease

AFJ grease uses refined mineral oil as its base and a urea-based grease as its consistency enhancer, while also featuring other special additives. This gives it excellent lubrication properties at a wide range of speeds—from low to high.

Features

• Wide range of speeds

It provides consistent and even lubrication at a wide range of speeds, from low to high.

• Wear resistance

Even at low speeds, it has excellent oil film formation to reduce wear.

• Vibration resistance

It reduces wear caused by machine vibration during high-speed operation.

Representative Physical Properties

Item		Representative value	Test method
Consistency enhancer		Urea-based
Base oil		Refined mineral oil
Base oil kinematic viscosity: mm²/s (40℃)		20	JIS K 2220 23
Worked penetration (25℃, 60 W)		325	JIS K 2220 7
Mixing stability (100,000 W)		360	JIS K 2220 15
Dropping point: ℃		185	JIS K 2220 8
Evaporation amount: mass% (99℃, 22 h)		0.6	JIS K 2220 10
Oil separation rate: mass% (100℃, 24 h)		7.0	JIS K 2220 11
Copper plate corrosion (B method, 100℃, 24 h)		Accepted	JIS K 2220 9
Low-temperature torque: mN-m (‒20℃)	Starting	38	JIS K 2220 18
	Rotational	13
4-ball testing (welding load): N		3089	ASTM D2596
Service temperature range: ℃		-20 to 120
Color		Yellowish brown

Wear Resistance Test Data (LM Guide Block)

Item	Description
Tested model	NRS55B2SS+780LP
Applied load	5.9kN
Feeding speed	0.1m/min
Stroke	200mm
Grease quantity	12cm3 (initial lubrication only)
Test duration	480 hours

Vibration Resistance Test Data (LM Guide Rail)
 

Item	Description
Tested model	SHS25R1UU+580LP
Applied load	11.05kN(0.35C)
Feeding speed	60m/min
Acceleration/ deceleration	9.8m/s2
Stroke	350mm
Grease quantity	2cm3 (initial lubrication only)

LM Guide Rolling Resistance Measurement Data

Item	Description
Tested model	SHS25R1UU+3000L
Applied load	No load
Acceleration	29.4m/s2(3G)
Stroke	2300mm
Test temperature	21°C
Grease quantity	2cm3 (initial lubrication only)
Measurement speed	0.5, 1, 2, 3, 4, 5, 6 m/s