OKfolks,therehasntbeenagrindertutorialforsometimenow,wheneverIpostoneofmineuptheygetalotofinterestsothoughtIwouldshowyouhowtomakeoneoftheseItsbasicallyaKMGcloneuses1600to2000x50beltsandthegreatthingaboutthesemachinesisthereadaptability.Itsverysimpletohaveaplatengrindinghead,contactwheelorsmallwheelattachmentAgeneraloverviewoftheconstructionis,allweldedmainframe,slidingtypetoolarmlockablewithasinglefastenei;singleknobtrackingsystemwithvariablespringtension,maindrivepulleyis100mmDiax55mmwideTrackingpulleyis80mmDiacrownedx55mmwideplatenrollers45mmDiax50mmwide.Thiswillberunwitha2hpmotorandthreespeeddrive.Forthoseofyouthathaveseenoneoftheseinactionyoullknowjusthowgoodtheyreallyare!Asfortheplan,theirisntone,IvemadequiteafewofthesenowandthemajorproblemthatIhaveisobtainingaregularsupplyofsteelthesizesthatIwant,soImakethemwiththesteelthatsavailabletome,Thegoodnewsisthatallthedimensionsgivenarequiteadaptable;aslongasyousticktoverysimilarsizesyoushouldntgowrong.Iwillstartofbymakingthemainframe(thebluebit)first,Itsanallweldedconstructionmakingforaveryrigidframe,thedisadvantageisyouwillneedtobeverycarefulingettingitclampedupsquareandspotonbeforeyouweld,asImsureyouwillappreciateitsarealpainhavingtogrindoffweldswhenyougetthemwrong!Iintendtocompletethegrinderrightthroughtofittingthemotorandrunningit.SoherewegothenletsmakeagrinderThisisthesteelthatwillberequiredtomakethemainframeandtrackingarm,allmaterialsareA=Trackingarm=300x30x10mmB=Trackingarmup-right=100x30x10mmC=Trackinghingematerials=(seeseparatebitonthetracking)D=Mainframetopsection=325x35x10mm(oruse1.5inchx3/8inch)E=Mainframeside=325x55x8mm(or10mm)F=Mainframeside=325x55x8mmG=MainframeBottomsection=390x35x10mmH=Frontup-right=150x50x10mmI=Frontstand=300x50x10J=Rearup-right/bearingcarrier=150x65x10mmK=Rearstand=300x50x10mmL=Rearup-right/bearingcarrier=150x65x10mmM=Maintoolingarm=500x35x35mmHereistherecorrespondingpositionontheframeNowbeforewegettheMIGoutweneedtodrillafewholesIwillbeusingSFT20bearingforthemaindrivepulley,sowehavetodrilltheup-rights(itemsJandL150x65x10)measuredownfromthetop,25mm(thisiswherethefirst11.5mmholegoes),markthecentreline,anddrilltosuitthebearings,makethemainmountingholes11.5mmandthecentrehole25mmthatwayitallowsforabitofadjustment.Thetrackingarmup-right(itemB100x30x10)markthecentreandmeasuredown15mmfromthetopdrill(8.5mm)andtapM10Thetwostands(itemsIandK300x50x10)markthecentrelinemeasurein15mmfromeachenddrill6mmfromoneendonlymeasurein50mmanddrill10mm(thisisforthemotormountingframe,notshownyet)Rightnowwiththatsuccessfullydonewemoveontothenextbit,thisiswherewegetserious,wenowhavetomakeaboxaroundthemaintoolarm,tomakethisaseasyaspossiblewewillusethetoolarmasajig,Youwillneedseveralclampsandbitsofmetaltogetthisright,placethetopandbottomboxsectionsoppositeeachotheronthetoolarm,wewillneedabitofclearaneeheresoinsertacoupleofthin(1mm)bitsofsteelbetweenthetoolarmandbottomsectionclampintoplace,fitthesides,positionsothetopislevelandclampintoplace,youshouldhavethelowersectionwith65mmprotrudingoutfromtheback(Gonthethirdpicturedown)Whenhappywithyourclamping,tackweldinseveralplaces,removeclampscheckforsquareandalignmentandthatthetoolarmslidesinandouteasilyifyourhappywithitwelditup,thengrindandcleanuptheweldsonthetopsection,Nowwewillfittherearup-rights(itemJandL)whenImaketheseIalwaysdrillasapair,whenitcomestoweldingthemintoplacetheyneedtobespacedat38mmapartontheinsideedgethisistoallowoneofthedrivebearingstofitbetweentheup-rights,thisisbestdonewithablockofmetal(Iuseanoff-cutfromthetoolingarm35mmplus3x1mmshimsmaking38mm)Positiontheup-rightsasinthephoto(above)andusethetoolarmtomakesuretheyareinlinewithsideA(thisisthesidethetoolarmclampsagainstsoeverythingmustbealignedwiththisside)useasquaretogetthemexactlyup-rightwhenyouarehappywiththepositionweldintoplace,(donotremovethespacerblock)shouldlooklikethisifyougotitrightNextisthefrontup-right(itemH150x50x10)usingablockposition35mmbackfromthefrontofthegrinder,makesureitssquareandweldintoplaceIfwearedoingokyoushouldhavesomethinglikethisNowitstimeforthestands(itemsIandK300x50x10)measurein100mmfromtheend(distaneeAinpicturebelow)usemetalblockandsquaretogetitrightwhenhappyweldintoplace,nowdothesamewiththefrontstandmakingsurethatthetwo10mmholesareontheoppositesidetosideAThefinalbitofweldingonthemainframeisthetrackingarmup-right(itemB100x30x10)positionA=15mminandB=35mminmakesureitssquareandweldintopositionIfprogressisgoingtoplanyoushouldhavesomethinglikethisThatsitfornowfolksnextinstalmentisthetrackingarm,trackinghingeandtrackingpulley1.OKfolksherewegoagainnextinstalmentisthetrackingarmandhingeassy,thisiswhatwearegoingtomakenextwiththesteelpositionsmarkedonit,itcallsforabitofprecisionweldingandisprobablythemostdifficultbittomakeonthegrinder.ThisisthematerialsrequiredListallmaterialsA=trackingarm300x30x10mmBMSB&D=40x16x16mmBMSC=80x25x5mmBMSE=30x25x5mmBMS(forthespringplatform)F=8m