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.
Features
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 |
|
Rotational |
70 |
||
|
4-ball testing (welding load): N |
3089 |
ASTM D2596 |
|
|
Service temperature range: °C |
‒45 to 160 |
||
|
Color |
Brown |
||
Sliding Resistance Comparison
| 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.
|
Grease used |
Central value of mm 2/s(cSt)(40℃) |
Dynamic viscosity mm 2/s(cSt)(40℃) |
Rotational speed |
|||
|---|---|---|---|---|---|---|
|
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 |
32 |
28.8 to 35.2 |
11.2 |
10.8 |
13.4 |
14.7 |
