Document MMqvO4v84jJO5wgK7x3LmmGnL

More PRACTICAL IDEAS. nance men usually use it. Ooe yi form of goge that can be died |Jj maintenance drilling is two hes^ shown. Hold nuta so two flits contact. Then angle of 1 formed for gaging th dtiU pohjl Angle of 120 deg Is usually cjj than guessing. As photo shows, g angle kero comes elose to Ideal uf by ipaeo between gsge and drill ^ Cage can be made a permueat l tion to tho too) box of a mechsai soft-soldering the twe flats together! making gaga easier to use. 1 C T Bowr.n London, Ciw Umponry wooden trough Remov^g Balls From Pulveriser Mill Because removal ooon on ball mill is not very large, weight of belle end elose quarters make removing e tough job. We eut e piece of common belting 30 in. long by 0 in. wide with two alole for hand holes, as shown. Now belle are pulled out very easily to the trough. C W Bentley Clinton, Iowa Solution ^U'centointr Longer Life for Conveyor Rollers Outer beadikc on roller C in top sketch runs dry because it Is farthest from grease supply and grease must push upwards to completely lubricate the bearing. Trouble was grease squeezed out Inner bearing without going through bearing to do a complete job. We thought of turning roller C around end (or end, but could not because shaft has a right-hand thread on one end and a left-hand thread on the other. But repairs were coally. It took about ten manhours to repair one set of beorings whenever it ran dry and scored. By switching rollers C and B os shown In lower sketch, both end bear ings are greased from upper end. That otso meant twitching oil lines around s shown so grease reaches trouble spots first. We also oonaldered that grease naturally works down to inner bearing after it is heated from work. By making these changes, our main tenance labor is very much less and our roller bearings last e long time. Lso Collen Clinton, Iowa Gage for Grinding Drills Bssr orill-powt ancli for twist drills is 118 degrees. Closer that cutting line approaches this angle, the better drill will cut. But few maintenance mechan ics bother to use s drill gage. They usually estimate the angle by looking at it. As a result, their drills absorb a lot more power and energy to drive through the work than they should. If you do have a drill gage, mainte Aeld-Cleanlng Heat Exchangers In ACio-CLBANinc heat exchangers, sea surface parte are cleaned belter t others. This is from coaeaBtrttWS Inlet of heat exchanger that b 1 _ (even though ever so slightly hlfhafl than concentration at outlet Then, B mechanical conditions of flow, aach^ eddy current and gas pockets i variations in cleaning procedure. To obtain uniform cleaning Job, r verse the flow. Chonge piping (sf passing acid for about half of lime) from positions shown to shir Moke pump discharge go to B a moke condenser outlet at A. Wbjjl pumping acid into B, hove a fairly MpJ vent (4 or 5 ft) so gaa I* : without losing acid eolutioo. t A Rooricuee Mexico City, A/aorvfl Use No. 3 Lead No. 3 PENCILS don't make lead uau in Ailing out production and lo| This harder lead U also better sb>J it doesn't break like the eoh ones- J L Fitzpatrick Jeffenon City, (Continued on page 130) 121 PLANT OPERATION ANO MAINTENANCE SECTION F0*0] Th*moUH Watts Mist'S