The mill rotor bearings which are mounted in the steel housing are two 2 cylindrical roller bearings NU 316 ECMC3 and one 1 grooved ball bearing SKF 6316 C3 The bearings have failed several times over a period of two 2 years Before this time the mill had no recorded bearing failures as confirmed by the CMMS
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The main reasons are fatigue and poor lubrication though contamination and poor installation can also play a part The remaining 95 of bearings are replaced in service prior to failure for safety reasons When failures do occur it’s critical to understand what went wrong
Precision ball bearings are designed to have a long and useful Ii€e Assuming the application is correct to begin with maximizing longevity means bearings must be properly installed lubricated and maintained Poor operating environments oarticularlv moist or contaminated areas ind improper handling practices invite premature bearing failure
What Causes Ball Mill Transmission Gear Failure Common Causes of Bearing Failure Applied Bearing Misalignment A frequent source of trouble resulting in overheating and separator failure Common causes are bent shafts outofsquare shaft shoulders outofsquare spacers and outofsquare clamping nuts Inspection of the raceways will Read More
Locked charge starts and your grinding mill Outotec absorption so a failure of mill bearings normally the CAUSES SAG and ball mills with grate discharge are not prone to locked charge events because of the Damaged bearing Cracked bearing support stool after a locked charge event
Dirtgrit contaminates bearing – causes deep scoring of journal surface and poor lube pressure retention lift Wearing through trunnion liner can cause localized erosionweakness Lube or operational failure may have caused overheating andor galling damage of journal surface
reasons for ball mill bearings failurecrusher and mill ball mill maintenance and repairStone CrusherRock Failure to eliminate the reasons for the phenomenon method Main bearing melting the parts such as ball mill liner the first to minespoon adjusting bearings Get Price
Jul 31 2013 · The mill normally operates at 3150 rpm rd Motor Bearing Legend d Motor Bearing d Mill Bearing rd Mill Bearing Bearing that was failing The mill rotor bearings which are mounted in a steel housing are two 2 cylindrical roller bearings NU 316 ECMC3 and one 1 grooved ball bearing SKF 6316 C3
The lack of lubrication was originated by a logic failure which allowed the mill to start and run over the trunnion bearing bushing without the lubrication system to be turned on that is without oil film The logic failure was caused by an operator fault
The main difference is the width of the spacer between the bearings During an overhaul of an axlebox for a 20 tonnes axleload the wrong distance ring for 225 tonnes axleload was fitted The width difference of 21 mm caused the bearings to shift on the journal and as a result heat was generated