A safe oil for my grinder?

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I have a Black & Decker 4-1/2" angle grinder... I keep a wire wheel and a hubbed grinding disc in my toolbox.When I switch over to the grinding disc, most often times I'll grind, then attempt to take the disc off to switch it with the wheel and... have a hell of a time doing it. Like I'm throwing out my shoulder pulling it off. It finally got really, really stuck today. No matter how hard I pulled, it just wouldn't budge.I walked over and told my instructor... he said just to put some oil on the spindle, and that should fix everything.I managed to get maintenance to spray it with some WD-40, but my instructor said that though it would work now, it wouldn't last.So... what oil specifically should I get? Where should I get it? I know nothing about this.if anything, I would prefer it if "it" came in pocket size so it would easily fit in my toolbox...At the same time, I'm kind of skeptical. Doesn't oil... burn, most of the time?I wouldn't want to reach for my grinder only to find it is on fire...Keeping it down in the hood...literally!
Reply:cant quite understand.. i have 5 grinders and all have a threaded shaft that the wheel slips on and a female-threaded thingy that screws onto the shaft. theres a little button you push that holds the shaft from turning and usually i can barehanded  unthread the wheel..got a foto of this grinder?
Reply:I have never thought to put oil onto my grinders before, but what might be happening here is when u put the wheel onto the grinder you are tightening the hell out of it. When u use up the disk it becomes smaller and then u cannot get as much torque taking it off small as u did putting it on when it was larger and new. The smaller it gets the harder it will be to take off.  Try to not tighten the wheel so much, just snug, it will also snug up a little more once you used it for a bit.Nothing Ever Got Done By Quitting, Never Give Up.
Reply:The hubbed grinding wheels have a wrench that goes with them just like the hubbed wire cups and whatever else 'hubbed'. But as for the oil, all you're going to need if you do put some on is a couple of drops of any kind of oil. That'll last about half a life time then a couple more drops for the other half.  If your not able to get the hubbed attachments off without lubing it a bunch then something else is wrong.
Reply:I believe your instructor referred to adding oil to the threaded spindle?If your just adding oil to lube the spindle and tension nut, almost any type of oil will work for that. You do have a wrench for pulling the grinding/cutting disc's and flap disc from your grinder, don't you?JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Some folks (never me ) will take the hubbed attachments, like a wire cup, put it on about a thread then hit the trigger so the shaft spins itslef into the nut. That will for sure slam a bigger grinding wheel on hard. No reason to, they turn in the direction that keeps them tight anyways.  Is that what's going on? No wrench so they get slammed on with the trigger then taken off by grabbing the wheel only?
Reply:I've cleaned up my threads on the wire wheel before to make them slightly sloppy.  Then as others have said just snug the wheel on with your hand.  It shouldn't take tools to remove it unless you have boogered threads or some grit in them.  Any oil added might help it come off easier, but it will also allow it to tighten up more and attract grit.  Kinda a double edged sword.My name's not Jim....
Reply:Originally Posted by Doug247Try to not tighten the wheel so much, just snug, it will also snug up a little more once you used it for a bit.
Reply:You really never knew theres wrenches for grinders?Anyways, I never bother with one.  I just use the ol' grab and twist method, if its on to tight I hit the switch once and let it spin down then hit the button to lock the arbor.  If the wheel doesnt spin off by itself its usually loose enough for me to get it off.Have we all gone mad?
Reply:you could use anti-sieze it comes in spray or a can or might try a dab of bearing grease i also use NO lube -- it should be self tighting
Reply:Yall are prob using the wrong side of the grinder causiog it to kick back and tourqe the hell out of the disk only use the right side of the grinder. It will prevent kick back wont have a problem with getting it off and you save a chance at loosing your fingers. I know you cant always use the right side but try to as much as possibleWeldandpower 225Heliarc Rig for itTorchesect ect ectLifes Short WELD NAKEDLooking for a SA200
Reply:Originally Posted by sn0border88Anyways, I never bother with one.  I just use the ol' grab and twist method, if its on to tight I hit the switch once and let it spin down then hit the button to lock the arbor.  If the wheel doesnt spin off by itself its usually loose enough for me to get it off.
Reply:Originally Posted by Drake AldanWorks like a charm. Just brilliant!Thanks a lot!
Reply:Originally Posted by TEKAnd also will destroy your grinder....they are not meant for an 'impact' type of loading, only a 'torque' load...If you do this much, you will break the housing or shear the pin....Not recommended......But hey, if its the schools, who cares, rightDo like Sandy suggested, use the wrenches, thats how it was designed to be used....
Reply:Originally Posted by TEKDo like Sandy suggested, use the wrenches, thats how it was designed to be used....
Reply:I imagine it is in the Tool Locker at school.All Grinders come with one when you buy them."4 1/2" Small angle grinderMetal grinding wheelSpanner wrench"http://www.blackanddecker.com/produc...view=3#detailsLast edited by Broccoli1; 10-19-2009 at 05:47 PM.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:One of those?... That fits over the nut, or something? I thought it was just for tightening the "holed disc" setup.That curved inside doesn't look like it would work too well.Keeping it down in the hood...literally!
Reply:Uh,,,,,,,,,, dunoo about this (dunoo be Aussie, or Scotish)It will tighten as you use it.  You don't have to bear down in it when you originally install the wheel.Put the dam thing on the floor so it resists the torque of the wrench, hit the lock button, and hit the wrench with the heel of your hand."Any day above ground is a good day"http://www.farmersamm.com/
Reply:no no nothis grinding disc doesn't work like that, it's hubbed, like a wire wheel is.http://www.icstool.com/products_pict...ding4.5Hub.JPGlike that.directly on the arbor, so I wouldn't have to deal with the wrench. Spin the wire wheel on when needed, spin it off, spin the grinding disc on when needed, spin it off...the catch is with the last "spin it off".Keeping it down in the hood...literally!
Reply:Originally Posted by rlitmanNot necessarily.I've got a Metabo "quick" grinder.  The metabo grinders with a yellow arbor lock button (some even have a "fingerprint" pattern on the top), are designed for just this.  However, these grinders also have a special locking nut with a friction spring, to keep the nut from flying off.
Reply:One other method is to lock the spindle and then jam/hit the edge of the disk on the table edge hard enough to dislodge it...obviously, in the direction opposite of which it went onThis is NOT a recommendation, and only used on my own, on occasion, but it will work if you really have to change disks and have no tools...
Reply:The wrenches are generally called arbor wrenches or something like that. You get them with some grinders if you buy a kit, table saws, all kinds of things. The smaller ones for die grinders they somethimes call collet wrenches. Cheezy piece of sheet metal with a stamped out slot. Just about any HF cheapo end arench flap wheeled real flat will work too. I know you guys have seen a gazzillion of these.This one fits the hubbed grinding wheels and most hubbed wire cups and even the large two sided hubs unless you get into the scrawny two sided hubs or metric. It measured 7/8ths".. Attached Images
Reply:If all else fails and i cant get a stubborn hard wheel off i will hold the lock in and try and roll it briskly on the bench.  Just a slight wrap on the bench and she busts loose.  Normally i just do this when im changing out a worn wheel.Vantage 500's LN-25's, VI-400's, cobramatics, Miller migs, synch 350 LX, Powcon inverters, XMT's, 250 Ton Acurrpress 12' brake, 1/4" 10' Atlantic shear,Koikie plasma table W/ esab plasmas. marvel & hyd-mech saws, pirrana & metal muncher punches.
Reply:Uh,,,,,,,,,, dunoo about this (dunoo be Aussie, or Scotish)
Reply:Hm.Would something like this work?http://www.drillspot.com/products/65...pen_End_Wrenchor would you suggest something else?http://www.stanleyproto.com/default....VIEW=ThumbViewMaybe one of those?Keeping it down in the hood...literally!Originally Posted by Drake Aldan. . .or would you suggest something else? . . .