perma-tec GmbH & Co. KG
- 16 -
The Expert in Lubrication Solutions
To Variation II:
120 cm
3
LC unit (M120)
2.78 cm
3
/100 h = 0.0278 cm
3
/h
120 cm
3
: 0.0278 cm
3
/h = 4316.5 h
4316.5 h : 40 h/week = 108 weeks
The lubricant is sufficient for more than 2 years, not including additional operational
breaks or any other machine standstills.
To Variation III:
250 cm
3
LC unit (L250)
2.89 cm
3
/100 h = 0.0289 cm
3
/h
250 cm
3
: 0.0289 cm
3
/h = 8650.5 h
8650.5 h : 40 h/week = 216 weeks
The lubricant is sufficient for more than 4 years.
Due to the stability of each individual lubricant we recommend variation I with
a 60 cm
3
LC unit.
Example 2:
Given the same machine as in example 1, but with different and irregular running
times e.g. 4 hours on day one, 1.5 hours on day two, not running on days three and
four, and 3 hours on day five.
You can determine the dip switch setting as in example number 1, but the total
discharge life of the LC unit and exchange date cannot be determined.
It is possible to calculate discharge periods of several years. Particular attention
should be paid to these lubrication points. Monitoring is possible with PLC
connection via the output signal “End of discharge”. Please pay special attention to
the shelf life of the grease when you choose long lubrication periods.
