causes of ball mill drive shaft runout

Central Drive or Girth Drive for Ball Mills Artec Machine Systems Damage to mill cylinder neck or stub endanger girth gear and pinion Repairs entail extra 6 causes knocking in the drive train vibration and slaclrening of nuts ball mills When restarting the axial runout of the girth gear is considerable Get Price

1 Ball mill drive pinion bearing wear wear online repair Enterprise 1 ball mill drive pinion bearing wear bearing 23256CAw33 journal 280mm rear shoulder 33005mm single side wear 45mm The company seeks to reach our company and our engineers give scientific analysis and repair suggestions for this problem 2 Ball mill hollow shaft

Drive shaft noises and possible causes are as follows Grinding and squeaking from the drive shaft is frequently caused by worn universal joints The joints become dry causing the rollers to wear

The Failure and ball mill journal bearing ball mill failure modes pdf ball mill pinion failure in south Get Price And Support Online A Publication of the Lubrication Engineers Technical if a ball mill or SAG mill is out of operation fo Live Chat

So if you have shaft breakage near the bearings misalignment is probably the culprit Shafts can wear out This is the cause of the vast majority of centrifugal pump shaft breakage Conventional wisdom notes that stresses far below the ultimate strength of the shaft if repeated enough will cause the shaft to break But not always

Excessive deviations will cause additional loads on the coupling drive shaft and bearings resulting in heat vibration wear and even fatigue and breakage 3 Vibration caused by unreasonable assembly of the gear shaft 1 The pinion vibration caused by the flank clearance and the top clearance of

Abacus Hydraulics Ltd pioneer of hydrostatic mill inching drives has since its foundation in 1969 designed manufactured and supplied over 1000 systems to plants around the world Over the past 40 years the mill sizes have increased dramatically and consequently the size and capacity re

Mar 18 2018 Product Description of Energy Saving Cylindrical energy saving grid ball mill is one of energy saving mills developed by our company which is easy to start and saves 2030 energy It is lined grooved ring plate which increases the contact surf

A simple rule for troubleshooting bearing temperatures No more than 180 degrees Fahrenheit 82 degrees Celsius on the housing The bearing outer ring can be up to 20F 11C hotter than the housing The lubricant originally specified for the application was likely selected to run at lower

A vibration survey was carried on this Ball Mill with a duel pinion drive The vibration is high in all planes on both sides of the Mill or both pinion drives The measurements were similar in velocity on the motor gearbox and both pinion bearings The recommendations for repairs was

If necessary repeat this procedure until the radial runout is within the 3 Ball Mill Grinding Get Price For this purpose a selfaligning pinion is fitted to the movablymounted pinion shaft loads to the mill via a girth gear for an extremely efficient ore grinding process m x m with a drive output of 15 MW and a ball mill

impact can cause brinelling Examples include using hammers to remove or install bearings dropping or striking assembled equipment and a bearing onto a shaft by applying force to the outer ring Install bearings by applying force only to the ring being press fitted ie do not push the outer ring to force the inner ring onto a shaft

Ball Mill PINION SHAFT BEARINGS Pinion shaft bearings are of the SKF antifriction type mounted in a common twin bearing assembly Bearings are fixed in place so that the pinion shaft of the mill is always in alignment with the drive components Vbelt driven mills are furnished with an outboard bearing of similar construction

Dec 01 2002 In extreme cases of shaft misalignment the bending stresses applied to the shaft will cause the shaft to fracture and break Bearing life expectancy The most prevalent bearings used in machinery ball and roller bearings all have a calculated life expectancy sometimes called the bearings L10 life a rating of fatigue life for a

A Large concrete surface at mill drive end Fig 2A with increased tendency towards cracking Shaft position shift impairment of tooth contact and risk of wear B Mostly common foundation block Fig 2B for mill and drive unit Risk of foundation cracking negligible No impairment of tooth con

I have an issue with a gear drive on a ball mill 2XGM is rising and i have sidebands at 107cpm and I dont know why they are at 107 not relevant to any turning speeds ect I checked the root clearance a week ago and the inboard is about a 066 smaller than the outboard The pinion is 24 long and has 24 teeth It is obvious i have there is obvious spalling on the gear faces

VBELT Ball Mill DRIVE Vbelt or polyV drives are generally used on grinding mills consuming 350 HP or less Where power exceeds this drives become so large and motors become special resulting in an uneconomical application Generally the driven mill sheave

22 ring gear diameter runout When measuring the radial jump a winch shall be used for disc grinding Before disc grinding the sliding shoes or hollow shaft oil station of the mill must be opened and the floating capacity of the mill shall be checked with a dial indicator

This paper analyses in detail the root cause for the failure of shafts which were designed to operate for more than 100000 h but have failed in just 1200 h Download Download fullsize image Fig 1 Schematic of shaft and coupling assembly indicating the location of failure

The drive of the ball mill consists of an induction electric motor twostage gearbox and the pinion gear This pinion gear is mated with the girth gear mounted on circumference of the ball mill shell and in that way it transfers the motion from the drive to the shell see Figure 1 taken from 1 Figure 1 Mechanical system of a ball mill

This is a ball mill in Gold Processing The gearboxes for both drives are shaft mounted to the pinion shaft with an attached torsion arm So the gearbox moves a bit during operation and would be a contributing factor to vibration by design

The common causes of vibrations of the ball mill are described in short The exciting frequencies at which the possible causes of vibration can be recognised are estimated for all principle parts of the ball mill After that the measurement of accelerations of vibration at housings of

23 ring gear end runout When measuring the end jump a winch is still needed for disc grinding Before disc grinding the sliding shoes or hollow shaft oil station of the mill must be opened and the floating capacity of the mill shall be checked with a dial indicator

This article describes in detail the approach and root cause for failure of pinion shafts used in bowl mills of thermal power plants This analysis clearly indicated that ceasing of the movement of the bowl mill segment all of a sudden due to hard rocky lumps was the main cause for failure

The asset is a verticallymounted belt driven grinding mill as shown in Figure 1 The drive spindle has three 3 bearings two 2 cylindrical roller bearings and one 1 ball bearing The mill is being belt driven by a 100 hp twopole motor The mill normally operates at 3150 rpm

This photo shows wear of the environmentside wall of a seal groove that occurred during extensive operation at 346 ftmin with 0010 dynamic runout The wear which is limited to the inner half of the groove wall is caused by the radial motion of the seal as it followed the dynamic runout of the shaft

This enables the center of the wing to be slid offcenter from the drive shaft and the bolt to be retightened to produce an eccentric movement of the axis of the mill body around the axis of the drive shaft The eccentricity that is the ratio of the mill revolution diameter G to the mill tube diameter D ranged from 02 to 06

Jul 31 2013 The drive spindle has three 3 bearings two 2 cylindrical roller bearings and one 1 ball bearing The mill is being belt driven by a 100 hp twopole motor The mill normally operates at 3150 rpm rd Motor Bearing Legend d Motor Bearing d Mill Bearing rd Mill Bearing Bearing that was failing