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Table 47.1 gives some important information regarding Harmonic Drive® Greases.
Table 47.1
Type
Operating temperature range
Base oil
Thickener
Consistency class (NLGI)
Base oil viscosity (40 °C; 100 °C)
Drop point
Colour
Max. storage time in hermetically sealed container
Ease of sealing (safety against grease- or base oil leakage
at the oil seals)
Notes:
+ = Good
+/– = May be critical depending on design / mounting position / application, please contact Harmonic Drive AG
Safety data sheets and technical data sheets for the Harmonic Drive® Greases are available from Harmonic Drive AG.
Precautions for using Harmonic Drive® Grease 4B No.2
Harmonic Drive® Grease 4B No.2 has fluid characteristics (thickness, shear characteristics etc.) suited to Harmonic Drive®
Gears. The following procedures can be utilised to improve the lubricant life:
1) apply the grease to the required areas before operation.
2) remove any abrasion particles after the running-in period.
3) re-grease the contact areas.
Precautions
1) When greasing:
The consistency of Harmonic Drive® Grease 4B No.2 when stored in the container is higher than during operation. However,
please note that the consistency varies depending on the storage period.
Before greasing please mix the grease to soften the consistency.
2) Aging (running-in):
The aging process before the fully loading the gears softens the grease. More effective grease performance can be realised
when the grease flows around the required contact areas of the Harmonic Drive® Gear.
Therefore the following aging method is recommended:
• Keep the internal operating temperature below 80 °C. Do not allow a steep increase in temperature during the aging process.
• Limit the input speed to between 1000 and 3000 rpm. Lower speeds are more effective. Select an input speed as close to
1000 rpm as possible.
• The time required for aging is 20 minutes or longer.
• Keep the output rotation angle as large as possible during the aging process.
Contact our offices if you have any questions about handling Harmonic Drive® Grease 4B No.2.
1021387
12/2018
V02
Harmonic Drive® Greases
Standard
SK-1A
SK-2
0 °C ... +80 °C
0 °C ... +80 °C
Mineral oil
Mineral oil
Lithium soap
Lithium soap
2
2
37; 5.9 mm
2
/St
37; 5.9 mm
2
/St
197 °C
198 °C
yellow
green
+
+
Special
Flexolub®-A1
4B No.2
-40 °C ... +120 °C
-10 °C ... +110 °C
PAO / Ester oil
Synthetic oil
Lithium soap
Urea
1
25; 5.2 mm
2
/St
50; 12 mm
180 °C
247 °C
pale yellow
pale yellow
5 years
+/-
1-2
2
/St
+/-
47
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