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Contact | |
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Manual Re-lubrication |
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| + Differential Roller Screws |
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+
Ballscrews
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| +
Internal Recirculation |
| +
High Speed Line |
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FAQ
|
Re-lubrication
For re-lubrication,
the same grease as in the factory lubrication should be used. Minimum
requirement for compatibility of greases are:
- Same or compatible thickener (on a soap basis)
- Oil of same type and viscosity
Manual re-lubrication
Intervals
depend on the type of wipers installed.
|
Wiper
|
Re-lubrication
|
| Nut with felt wipers | min. 2 x per year respectively every 1000 working hours |
| Nut with finger wipers | min. 3 x per year respectively every 650 working hours |
| Nut with labyrinth-seals | min. 4 x per year respectively every 500 working hours |
| Nut without wipers | min. 6 x per year respectively every 300 working hours |
Before applying new grease, all dirt should be wiped off. Then fresh grease should be applied as follows:
- Build a thin and even layer of grease on the screw surface
- Feed some grease through the lube hole into the nut (if applicable)
Grease quantities are based on the following:
- Height of grease layer on the screw surface approx. 0.3 mm
- Nut filled to about 15-50%
Grease quantities for manual re-lubrication:
|
Nominal Diameter |
Grease on the spindle [g] |
Grease quantity in the nut [g] |
|
|
Single nut |
Double nut |
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|
3 |
0,15 |
- |
- |
|
5 |
0,3 |
- |
- |
|
8 |
0,7 |
- |
- |
|
12 |
1 |
- |
- |
|
16 |
4 |
0,2 |
0,3 |
|
20 |
7 |
0,5 |
0,8 |
|
25 |
10 |
0,7 |
1 |
|
32 |
17 |
1,1 |
1,7 |
|
40 |
25 |
1,8 |
2,7 |
|
50 |
35 |
2,4 |
3,6 |
|
63 |
50 |
3 |
4,5 |
It is important to apply the grease as evenly as possible. This can be achieved by moving the nut through its full travel several times.Grease on all functional surfaces also works as corrosion inhibitor.
Specific weight of most greases is about 1 g/cm³, so the quantities given in grams equal about cubic centimeters.
Friction torque and operating temperatures after re-lubrication will be slightly higher than normal. This is why frequent re-lubrication with a samll amount of grease is better than infrequent lubrication with large amounts of grease.