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Tool Talk Discussion Forum

die grinder parts and brands

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jonathan small

01-12-2005 14:26:36




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ok i got told to buy a 90 degree die grinder. now im under a money restraint to buy the tool but someone is giving me bits and accisories. what brand should i get i can only spend 70.00$. im going to use the die grinder to start a project. im restoring an old john deere chopper than my oldest brother got me. i have to gring rusty sheet metal and cut tin. if anyone could help me i would really apreciate it. thanks jonathan small

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Bob in KY

01-14-2005 10:16:01




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 Re: die grinder parts and brands in reply to jonathan small, 01-12-2005 14:26:36  
Hey Jonathon. If you have an air compressor with reasonable capacity, you can go to the Harbor Freight web site and get a cheap air die grinder for $20 or so. The 90 degrees may be $10 more. I have used these for years and I love them. When they break, throw them away and order another one, although I do not think I have ever replaced one. Don't fear the air tools that Harbor Freight sells, just don't buy their sockets, wrenches, or precision tools like that. Make sure to use the hydraulic oil every time you hook it up, and it will last a long time. Good luck.

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Charles (in GA)

01-13-2005 20:59:13




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 Re: die grinder parts and brands in reply to jonathan small, 01-12-2005 14:26:36  
Unless you have $250 or so to buy a Dotco or Sioux or possibly a good IR then you will find all the cheap ones, Nothrern tool, harbor freight, Cambell-Hausfeld, etc. about the same, possibly made in the same factory.

90 grinder is a very useful tool, 3 inch and 4 inch cutoff wheels (20,000 rpm) and 3m roloc discs for sanding and scotchbrite are great for lots of work. Problem is you need a good supply of air. these things will suck 10 cfm or better, and the cheap ones use measureably more than the expensive ones.

Small 90 grinders are about .3 hp and larger straight grinders are generally about .9 hp

You can get small straight ones but I have always perfered the 90 version in the small motor models.

Charles

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NC Wayne

01-12-2005 20:56:14




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 Re: die grinder parts and brands in reply to jonathan small, 01-12-2005 14:26:36  
It depends on what position your cutting in the most as to wether you would want a straight or a 90 degree grinder. If the piece your cutting is lying down or if your making vertical cuts on a standing piece then it's usually just easier and more comfortable/natural to hold and cut a straight line with a straight one than the 90 would be. Now if your planning to make alot of horizontal cuts down the side a piece that's standing then the 90 is the way to go. Another good use for the 90 is for sanding and cleaning gasket surfaces. With a Roloc pad on it you have the shoice of different grit sandpaper discs for sanding, Scotch brite discs for cleaning gasket surfaces, etc etc. Basically for what your planning to do both kinds of grinders are gonna serve a usefull purpose for you. These die grinders aren't all that complicated design wise, basically all they are is an air motor with a collet to attach a tool. That said it's hard to mess something like this up even with a "non-name brand" tool. Dad and I use or tools in a equipment repair business so they get used pretty regularly. For our impacts and the like we stick with IR or CP, but for the die grinders we have found that the cheaper ones work just as well as the name brand stuff. In fact I've been told that often the parts are interchangable to one degree or another. For just a little more than you said you were looking to spend you should be able to get both a straight and a 90 from somewhere like Northern that will do all you want them to do. The main thing is when your cutting to use the thinnest disc you can get. That allows you to cut alot faster as well as not working the tool nearly as hard as a thicker wheel would. On that note if your planning to do alot of light guage sheetmetal you might want to look into either a nibbler or a shear. Both work good and are alot faster cutting than using a die grinder, the drawback is they are gonna cut a wide kerf so you'd have more material waste. Just my .02, hope it helps.

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dr.sportster

01-12-2005 17:59:08




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 Re: die grinder parts and brands in reply to jonathan small, 01-12-2005 14:26:36  
Are you sure you need this 90 degree die grinder? Maybe you mean disc grinder.A 90 degree die grinder would probably be used for tight places where other tools wont fit.It would seem unusual for this to be used for general restoration work.Perhaps you want to cut with a muffler cutter in it.Just asking.



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