ALIMAK 27/37 hoist: reducer vibration and heating cut without disassembly

DALCANADA Ltd, Canada · signed by: Joe Bouchard, Vice President of Manufacturing Operations and Technology

Canada · measurements 15.01–11.02.2004 · letter dated 23.02.2004

PRODUCTXADO gel for reducers9 ml per 2 l of synthetic gear oil

TREATED UNITDrive of the ALIMAK 27/37 goods-and-passenger hoisttwo angular worm reducers on a common rack · rated load 6000 lb

DOCUMENT TYPEOperator testimonial letter
with a table of its own measurements

Key results

↓56-83%

vibration of the upper reducer at two points, 500 h of operation

↓9-30%

vibration of the lower reducer at two points, 500 h of operation

↓10°C

lower reducer temperature, 50 → 40 °C

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

XADO was approached because of a fault: before treatment the upper drive reducer ran noisily and with vibration. The hoist was neither disassembled nor taken out of service — 9 ml of gel were added to the oil and the measurements were taken while running after 100 and 500 hours of operation. The conclusion of the DALCANADA Ltd letter: “We are convinced that, thanks to the treatment with XADO technology, the noise and vibration level in the gearbox has decreased considerably. By reducing the vibration in the upper reducer, we also managed to reduce the vibration in the lower reducer.” The same letter notes a side effect — slight heating of the upper gearbox. By 500 hours of operation the effect held on both drive reducers.

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. The original letter is published in full and available for download.

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: Reduction gearbox

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