Original Grease AFA Grease

AFA Grease is a high-grade grease that possesses a long service life, excellent water resistance, and low sliding resistance through the use of high-grade synthetic oil as the base oil and a ureabased consistency enhancer.

Micro-vibration
Water-resistance
For sliding friction
Ulea-based

Features

Low sliding resistance
As the kinematic viscosity of the base oil is low, it is ideal for long-stroke, high-speed LM Guide operations.
Water resistance
It is less vulnerable to moisture penetration than other types of grease because of its high water resistance.

Representative Physical Properties

Item		Representative value	Test method
Consistency enhancer		Urea-based
Base oil		High-grade synthetic oil
Base oil kinematic viscosity: mm²/s(40℃)		25	JIS K 2220 23
Worked penetration (25°C, 60 W)		285	JIS K 2220 7
Mixing stability (100,000 W)		329	JIS K 2220 15
Dropping point: °C		261	JIS K 2220 8
Evaporation amount: mass% (99°C, 22 h)		0.2	JIS K 2220 10
Oil separation rate: mass% (100°C, 24 h)		0.5	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	170	JIS K 2220 18
Low-temperature torque: mN-m (‒20°C)	Rotational	70	JIS K 2220 18
4-ball testing (welding load): N		3089	ASTM D2596
Service temperature range: °C		‒45 to 160
Color		Brown

Sliding Resistance Comparison

Test conditions

Item	Description
Tested model	SHS25RUUC0
Speed	2.0m/s
Stroke	2300mm
Amount of lubricant injected	2.5 cm³ (initial lubrication only)

Rotational Torque Testing with Ball Screw Grease

<Test method>
1 cm³ of grease was applied to the KR4620A + 640L LM Guide and 2 cm³ to the ball screw (initial injection only), and then the torque was measured at each motor rotation speed. The output values on the driver torque monitor were used for the torque measurements.

Rotational Torque Testing with Electric Actuators

Unit: N･cm

Grease used	Central value of dynamic viscosity mm ²/s(cSt)(40℃)	Dynamic viscosity range mm ²/s(cSt)(40℃)	Rotational speed
Grease used	Central value of dynamic viscosity mm ²/s(cSt)(40℃)	Dynamic viscosity range mm ²/s(cSt)(40℃)	100min^-1	1000min^-1	2000min^-1	4000min^-1
AFA Grease	25	22.5 to 27.5	11.3	11.3	12.3	14.6
Lubricating oil VG32	32	28.8 to 35.2	11.2	10.8	13.4	14.7