sag mill main bearings

Hofmann Engineering

Hofmann Engineering has a long and successful history of designing manufacturing installing and servicing mill and kiln parts With a capability of manufacturing girth gears up to 15m 49ft diameter and shells up to 134m 44ft diameter Hofmann Engineering is in a...

Ball mill high vibs AMP Maintenance Forums

Hi Observing high vibs on pressing and lifting pinion DE and NDE bearing on a ball mill Motor and main GB drive are OK Clear predominant gear mesh frequency is appearing in the spectrum along with harmonics and side bands But 1st GMF is predominant side bands with pinion speed is seen no GG speed side band was observed Some of the vib data spectrums and photos shown in the attachment...

Care and Maintenance of Bearings

Care and Maintenance of Bearings Revised We thank you for your interest in NTN bearings This booklet is intended as a guide to bearing maintenance with the main consideration being on-site bearing maintenance Bearings may fail earlier than the expected rolling fatigue life Early failure is mostly attributable to inadequate handling or...

What s the Difference Between SAG Mill and Ball Mill

The main bearing bush is lined with babbitt alloy bush each bush has two high-pressure oil chambers high-pressure oil has been supplied to the oil chamber before and during the operation of the mill the high-pressure oil enters the oil chamber through the...

Main Bearing

The main bearing consisting of a bearing proper and a shell is a spherical surface seat-supporting type This is an elliptical shape that compared to conventional bearings reference Fig 234 A and B offers a much greater effect in stabilizing the shaft during turbine operation Large-capacity rotors use tilting pad-type bearings that provide a greater shaft-stabilizing function...

Modelling SAG milling power and specific energy

mill diameter mill length grates openings and pebble ports size the power equation is also function of all the operational variables selected for this study The applied force is a function of the mass inside the mill and it is composed of balls ore and water The ball charge is a function of the bulk fraction of the SAG mill volume Jb...

The Selection and Design of Mill Liners

High Carbon Chrome Moly Steel 325 to 380BHN This steel is now considered the main material used for SAG mill liners There are a number of variations with either different carbon or chrome contents The variations tend to have a bearing on the size of the liner and its section thickness...

Sag Mill High Vibration

On site we have a Sag Mill Driven by a 5500KW Motor We have a vibration issue right across the Mill The highest vibration is 30mm/sec RMS axial on the motor non drive end bearing White metal Bearing The gear mesh frequency is 4200 CPM The dominant frequency is 2400 CPM...

MillBearings

Sugar mill bearing are an important component of the extraction mills comprising of a hollow casting which must be of the highest manufactured quality hydraulically sound to ensure that the circulating cooling water is contained within the bearing body It is essential that the bearing materials used have the requisite properties...

SAG 2011 paper 144

Mar 16 2015 0183 32 The following items are interchangeable between the SAG and Ball mill Main drive motors High speed couplings Gear reducers Low speed couplings Pinion gears Pinion bearings Inching drives Liquid resistance secondary starters Main bearings and lubrication systems Trommel screen frames This achieved a significant reduction in the required...

Evolution of SAG Mill Process Control at the Xstrata

decided to make SAG control one of its priorities in order to further increase throughput and improve stability The original primary mill control logic delivered by the Optimisation Project in 2005 consisted of a simple PID loop controlling the mill charge bearing pressure through feed rate chang...

FAG Rolling Bearings in Rolling Mills

mill bearing arrangements and fundamental subjects in bearing arrangement engineering such as dimensioning mounting and dismounting lubrication and maintenance is given in the list on page 52 of this publication Foreword Contents Roll neck bearings 4 Design conditions 4...

Ball Mill Main Bearings

ball mill main bearing hotel-ustronpl ball mill main bearing Description Ball mill_Henan Hongji Mine Machinery Co Ltd The ball mill is the key equipment to crush the material after being crushed This type of mill is equipped with a number of steel balls in its cylinder as grinding medium...

OUTOTEC MH SERIES GRINDING MILLS

MH Rod mill MH Ball mill MH SAG mill 500 1000 1500 2000 2500 3000 Maximum installed power kW All load-bearing structures in our MH Series mills are designed according to Outotec design standards to ensure safe and reliable operation In order to keep manufacturing costs and delivery time to a minimum some design parameters are fixed...

Grindin at the Mill

The main problem with these harder ore types is that they hold up in the SAG mills restricting throughput The SAG mill feed is controlled by the mill weight measured by 4 load cells on the mill bearing system Therefore if the ore does not grind quickly enough in the SAG mills the mill weight increases and the control system reduces feed to...

typical lift in trunnion bearings of sag mills

Sag Mill Trunnion Bearing Operating Temperature Sag mill trunnion bearing operating temperature this sag mill trunnion bearing lubrication system was custom built for our and electrical temperature transducers pressure gauges pressure transducers the result is the g series ball valve which features an expanded operating temperature rating trunnionstyle and h series ball valves provide...

Sag Mill Maintenance

Component wear regardless of whether it involves bearings lifters or other parts of the machine is a constant concern for SAG mill operators Industry suppliers have developed a wide variety of liner shapes composite-material combinations and fastener systems to make liner replacement safer quicker and more cost-effective in the long run...

Used Sag Mills for sale equipment more Machinio

26 x 14 ft 79 x 42 m SAG Mill 6 300 HP 4700 kW Motor 26 x 14 ft 79 x 42 m SAG Mill 6 300 HP 4700 kW Motor Variable speed drive available at extra cost Mill includes - main drive motor Slip Ring 6 300 HP - liquid resistance starter includes variable speed d...

SAG Mill Grinding Circuit Design

Oct 19 2020 0183 32 The SAG Mill is a machine added by Ender IOIt uses Micro Infinity 181 I to grind or mill items into their crushed variants like Ores into DustsThe SAG Mill has four output slots recipes can have 1-4 different outputs with different chances of obtaining those outputs Uniquely the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency resulting in...

Vibration Sag Mill Motor NDE Bearing AMP Maintenance Forums

At our mine we have an issue with vibration at the Sag Motor NDE bearing The bearing is a journal white metal bearing The motor has been running for about 14 months now The vibration at the NDE bearing was around 2mm/sec In the last month it has climbed to 45mm sec with the dominate frequency 1x RPM...

Autogenous and Semi

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity Fuller-Traylor SAG/AG Mills range in size from 43m through 122m in diameter with powers as high as 28 000 kW...

Machinery Failure

Both main bearings on a SAG Mill at a cement factory suffered a catastrophic failure In addition to analysing data on the service life of the bearings our engineer inspected the SAG Mill and the failed bearings Our engineer also performed Finite Element Analysis FEA to investigate the design of the bearings and bearing housings and the...

sag mill main bearings

sag mill main bearings slide shoe bearing sag mill Raymond Mill Adopting many advantages from various mills and the ideal substitute of the Raymond Mill The bearing device of impeller drive is separated from water and materials with water to avoid the damage of the bearing slide shoe bearing sag mill...

SAG Mill Components

Once the basic operating conditions have been defined for the mill designer then and only then can he begin taking into account shell and head stresses and trunnion bearing sizes required to carry the load and to give the required openings for feeding and discharging the mills Mill heads are key structural components of any grinding mill...

Converting AG to SAG mills The Gol

Feb 01 2012 0183 32 The main manipulated parameter to control the dry SAG mill was the exhaust fan power draw The higher the power draw of the fan the higher the amount of discharged particl When the amount of discharged particles increased the feed rate to the mill was also increased to keep the power draw of the mill at the set point value...

Ball Mills

Oleg D Neikov in Handbook of Non-Ferrous Metal Powders 2009 Tumbling Ball Mills Tumbling ball mills or ball mills are most widely used in both wet and dry systems in batch and continuous operations and on a small and large scale Grinding elements in ball mills travel at different velociti Therefore collision force direction and kinetic energy between two or more elements vary...

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