Bmill25 Posted July 21, 2015 Report Share Posted July 21, 2015 i have the m18 (non-fuel) grinder. I read somewhere that I can use 5 inch blades instead of 4.5 inch. Has anyone done this? How did it work out? Quote Link to comment Share on other sites More sharing options...
comp56 Posted July 21, 2015 Report Share Posted July 21, 2015 if you have the 2680 max is Spindle Thread Size: 5/8" x 11 UNC Max. Wheel Dia.: 4-1/2" will it work most likely, but knowing grinders I would not .... Quote Link to comment Share on other sites More sharing options...
JerryNY Posted July 21, 2015 Report Share Posted July 21, 2015 Unless you're sure your model can use 5" I would stick with 4.5". The upside is 5" wheels are much less common. You can find anything everywhere for 4.5", not so much 5". Quote Link to comment Share on other sites More sharing options...
Bmill25 Posted July 22, 2015 Author Report Share Posted July 22, 2015 I use my grinder with a diamond blade to cut stone veneer and brick. Sometime I use it to grind out joints to repair them. It's probably not the best idea to use a 5" blade on a 4.5" grinder but I saw someone talking about how they do it. Quote Link to comment Share on other sites More sharing options...
jeffmcmillan Posted July 22, 2015 Report Share Posted July 22, 2015 - Does the disc rpm exceed your grinder?- Does the disc fit your blade guard?- Does you grinder have enough power? If so go ahead, but you're almost certainly going to grind faster with a 4-1/2 inch disc. Larger discs bog down before you can get enough pressure for the grit to dig. They don't just shake a magic-eight-ball to determine the size rating of a grinder and if they did I doubt any of us would have one to answer your question. They just just optimizing motor power then building safety features around that grinder type. Quote Link to comment Share on other sites More sharing options...
WeldfabNeil Posted July 22, 2015 Report Share Posted July 22, 2015 I have two m18 fuel grinders an a m18 regular grinder(that needs repair) an the fuel grinders have 5" guards that fit them. As far as weather a wheel will work or not if it doesn't fit the guard an spindle or exceeds max rpm don't use the wheel. Grinders are under estimated in the amount of damage they can do. Quote Link to comment Share on other sites More sharing options...
Daniel Julian Posted January 25, 2016 Report Share Posted January 25, 2016 Related to Grinders... I have the M18 fuel grinder and it has 5/8"-11 arbor. The only blades I can find at HD either have 7/8" arbor or they have 5/8 arbor but are only a 4" wheel. Can I use the 7/8 size with some kind of adapter or something? Or do I have to special order a blade? Quote Link to comment Share on other sites More sharing options...
comp56 Posted January 25, 2016 Report Share Posted January 25, 2016 grinders are a very dangerous tool and that is before the wrong person gets to pull the trigger, so ya using what was meant for it is best. 1 Quote Link to comment Share on other sites More sharing options...
kruton Posted January 25, 2016 Report Share Posted January 25, 2016 I'm with comp, I know all tools can be dangerous, but grinders can be especially nasty. Unless the manufacturer states it, I probably would keep with the 4-1/2. Of course that is just my .02.Sent from my SM-N900V using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
NicholasShetley Posted January 25, 2016 Report Share Posted January 25, 2016 Related to Grinders... I have the M18 fuel grinder and it has 5/8"-11 arbor. The only blades I can find at HD either have 7/8" arbor or they have 5/8 arbor but are only a 4" wheel. Can I use the 7/8 size with some kind of adapter or something? Or do I have to special order a blade?My corded Milwaukee grinder has a washer that has a raised portion that is 7/8 and the wheels work fine on them. I would think your grinder is the same. Quote Link to comment Share on other sites More sharing options...
comp56 Posted January 25, 2016 Report Share Posted January 25, 2016 yes disc ratings are probably overlooked the most, how many times do you check to make sure the grinder will spin the wheel to fast?thing with grinders is there are three things to worry about, the grinder itself, the wheel used and then the operator I have seen some nasty stuff and will say my Milwaukee fuel grinder is probably the most respected tool in my shop.....here is one:you need a new grinding disc, the young guy is grabbing a box from the truck.....unannounced to you he fumbles and drops the box and don't think nothing of it comes in the shop and puts the box right near you.....in a hurry you rip open the box and slap on a new disc...unfortunately there now is a hair line crack and it flies to pieces as soon as you start grinding....... Quote Link to comment Share on other sites More sharing options...
jeffmcmillan Posted January 25, 2016 Report Share Posted January 25, 2016 Related to Grinders... I have the M18 fuel grinder and it has 5/8"-11 arbor. The only blades I can find at HD either have 7/8" arbor or they have 5/8 arbor but are only a 4" wheel. Can I use the 7/8 size with some kind of adapter or something? Or do I have to special order a blade?5/8-11 is the threading on the arbor and typically for 5/8-11 threading the flange around the arbor has a 7/8" ring to use 7/8" blades. Just try a 7/8" blade and it should fit. It's actually unsafe to use this with 5/8" blades if it has that ring on the flange for 7/8" blades because the clamping surfaces don't align and it can cause the blade to fail. Quote Link to comment Share on other sites More sharing options...
comp56 Posted January 25, 2016 Report Share Posted January 25, 2016 My corded Milwaukee grinder has a washer that has a raised portion that is 7/8 and the wheels work fine on them. I would think your grinder is the same.the raised portion is not for larger holes in the disc/wheel it is for different thickness of the wheel or disc.. 2 Quote Link to comment Share on other sites More sharing options...
NicholasShetley Posted January 25, 2016 Report Share Posted January 25, 2016 Now that I think about it the does seem right. There was something on it that would allow a 7/8 disc to be evenly spaced. My grinder is at home and I'm at school or else I'd take a picture. Quote Link to comment Share on other sites More sharing options...
John Glassey Posted January 26, 2016 Report Share Posted January 26, 2016 Yes I agree, grinders # 1 in the respect department and in my book radial arm saws #2. Quote Link to comment Share on other sites More sharing options...
Daniel Julian Posted January 26, 2016 Report Share Posted January 26, 2016 I understand about sticking with 4 1/2 or 5" blades as recommended, I just wasn't sure about the arbor size. I'll try and find a 4 1/2" with 5/8 arbor hole. Thanks everyone for the feedback! Quote Link to comment Share on other sites More sharing options...
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