Oven bearings up to 190 °C: clearance reduced, flushing eliminated

Bearing clearance tightened, weekly flushing was dropped, grease consumption fell. Bakery oven No. 1, conveyor bearings, Palianitsa LLC, bakery. Ukraine · 2002.

Palianitsa LLC, bakery — bakery products shop · approved by Director V. G. Khil; the act was signed by shop mechanic S. V. Ponomariov and XADO LLC engineer I. N. Sharaikin

Ukraine · treatment 26.02.2002 · act 17.04.2002 · running time at the moment of measurement 480 h

PRODUCTXADO-250 heat-resistant greasetreatment by XADO technology, performed 26.02.2002

TREATED OBJECTIndustrial oven No. 1 of the bakerytwo No. 306 radial ball bearings in the conveyor shaft supports

DOCUMENT TYPECompany act
with signatures and seal

Key results

↓0.01mm

radial clearance in each of the two bearings, measured after 480 h of operation

↑2.9-3.6×

maintenance interval of the unit, 100-120 → 350-360 h

↓60%

grease consumption, 100 → 40 % of the previous volume

UNIT AND INITIAL CONDITION	OPERATING CONDITIONS	WHAT WAS MEASURED
Oven No. 1, conveyor shaft supports — two No. 306 bearings	Temperature 160-190 °C, humidity above 75 % — steam released during bread baking	Radial clearance, condition of the working surfaces
Standard grease before treatment — industrial oil mixed with graphite, previously LITOL-24	Bearing service life 6-8 months, weekly maintenance	Maintenance interval, grease consumption

Oven bearing unit: before treatment and after 480 hours on XADO-250

PARAMETER	BEFORE TREATMENT	AFTER TREATMENT
Radial clearance of the bearing	Intensive wear of the working surfaces	Reduced by 0.01 mm in each of the two bearings
Maintenance of the unit	Removal of old grease, flushing and packing of a new portion every 100-120 h — weekly	Grease top-up once every 350-360 h — once in 3 weeks; flushing and replacement eliminated
Grease consumption	100 % — industrial oil mixed with graphite	No more than 40 % of the previous amount
Condition of the working surfaces	Corrosion, residues of coked grease	Surfaces cleaned of corrosion and residues of the standard grease, no coking

Measurements under standard oven conditions: temperature 160-190 °C, humidity above 75 %.

Conclusion of the act

Before treatment the unit worked in heat and steam: the standard grease coked, the working surfaces corroded, the bearing lasted 6-8 months and required flushing every week. The commission of Palianitsa LLC recorded: a detailed analysis of the results of treating the bearings with XADO-250 heat-resistant grease gives grounds to conclude that the use of this grease for bearings of units operating in similar conditions will make it possible to protect them from the effects of an aggressive environment, to restore worn friction surfaces and to increase service life by at least 3×. At present the remaining bearing units of the bakery's ovens and electric motors are being transferred step by step to XADO heat-resistant greases.

The results relate to No. 306 bearings in the conveyor shaft supports of a bakery oven operating at 160-190 °C and humidity above 75 %; on other units and under other conditions the figures may differ. The treatment was performed by XADO LLC, the act was approved by the director of Palianitsa LLC and signed by the shop mechanic. The original act is published in full and available for download.

Current equivalent

Revitalizant gel for compressors and bearings →

Piston, screw and centrifugal compressors; rolling and sliding bearings running in an oil bath; machine-tool spindle units and slideways.

How such units are treated: Bearings

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