IE C006OPERATOR TESTIMONIAL LETTER WITH A TABLE OF MEASUREMENTS
ALIMAK 27/37 hoist: reducer vibration and heating cut without disassembly
Vibration of both drive gearboxes dropped, the lower gearbox housing ran cooler. 56–83 % — upper reducer vibration, two points, 500 h; 9–30 % — lower reducer vibration, two points, 500 h; 10 °C — lower reducer temperature, 50 → 40 °C (2004).
with a table of its own measurements
Key results
| EQUIPMENT | CONDITION AT THE START OF THE TRIAL | WHAT WAS MEASURED |
|---|---|---|
| Upper drive reducer | Ran noisily and with vibration | Vibration at two points, housing temperature |
| Lower drive reducer | Ran in parallel on the same rack | Vibration at two points, housing temperature |
Reducer vibration — change against the baseline measurement
| UNIT | MEASURING POINT | AFTER 100 H | AFTER 500 H |
|---|---|---|---|
| Upper reducer | Point 1 | −82.5 % | −82.5 % |
| Upper reducer | Point 2 | −64.4 % | −55.6 % |
| Lower reducer | Point 1 | −10.0 % | −30.0 % |
| Lower reducer | Point 2 | −18.8 % | −9.4 % |
The vibration scale and the measuring instrument are not named in the document, therefore only the relative change against the pre-treatment measurement is given.
Reducer housing temperature
| UNIT | BEFORE TREATMENT | AFTER 100 H | AFTER 500 H |
|---|---|---|---|
| Upper reducer | 54 °C | 55 °C | 47 °C |
| Lower reducer | 50 °C | 49 °C | 40 °C |
| Ambient air | 0 °C | −1 °C | −3 °C |
Housing and ambient air temperatures were recorded in the same measurement session on 15.01, 20.01 and 11.02.2004.
Operator's conclusion
Current equivalent
Revitalizant gel for gearboxes →
Industrial gearboxes, final and central drives, truck and tractor gearboxes, open gear and chain drives.
How such units are treated:
About this result:
Limits of this report: The results refer to the worm drive reducers of the ALIMAK 27/37 construction hoist and to the stated operating mode; under other conditions the figures may differ. The document is an operator testimonial letter with a table of its own measurements, not a test report.