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Die Grinder or Angle grinder/sander?

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TMAC

12-24-1999 07:42:59




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I am just starting to weld so I am going to be needing power tools for removing rust as I prep the base metals. For now I intend to buy one but not both of the tools mentioned. Which of the two would be better and more useful? I have an air compressor so I am considering an air tool.




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tyler

07-30-2003 19:51:49




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
go to lowes and get a dewalt dw400 4.5 grindr you wont be sorry



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Fred Martin

12-27-1999 11:53:39




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
Hi TMAC from Fred
After reading the posts on this, I must comment again on this. I've owned several varieties of grinders both air and electric, big and small and they do the job they were intended to, some better than others. But,these are a real dangerous tool to use for both experienced and non-experienced. Especially the small one handed ones. Can you imagine what a jagged edged grinding wheel can do to your belly at 10,000r's? Please be extra careful with this tool! Always wear surrounded eye protection and a heavy welders apron with them. And run everybody else off if you're going to turn on a wire brush at 10,000 rpm. I've done it and thats too fast for them, they want to stand almost straight out at that speed (cup type) No good,dangerous for it and you. Use american made 5 or 6 thousand rpm for this. Remember: recommended cutting speed for most grinding wheels is around 5000 surface feet per minute and sfpm x 12 over pi x diameter = rpm Figure it out, that's a crazy speed to be running a grinder. Although the faster a grinding wheel runs, the harder it acts. If that's their game, it's a dangerous one. Though you'd like to know. Fred from the Mung Factory

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Fred Martin

12-27-1999 11:23:22




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
Hi TMAC from Fred
After reading the posts on this, I must comment again on this. I've owned several varieties of grinders both air and electric, big and small and they do the job they were intended to, some better than others. But,these are a real dangerous tool to use for both experienced and non-experienced. Especially the small one handed ones. Can you imagine what a jagged edged grinding wheel can do to your belly at 10,000r's? Please be extra careful with this tool! Always wear surrounded eye protection and a heavy welders apron with them. And run everybody else off if you're going to turn on a wire brush at 10,000 rpm. I've done it and thats too fast for them, they want to stand almost straight out at that speed (cup type) No good,dangerous for it and you. Use american made 5 or 6 thousand rpm for this. Remember: recommended cutting speed for most grinding wheels is around 5000 surface feet per minute and sfpm x 12 over pi x diameter = rpm Figure it out, that's a crazy speed to be running a grinder. Although the faster a grinding wheel runs, the harder it acts. If that's their game, it's a dangerous one. Though you'd like to know. Fred from the Mung Factory

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bbott

12-26-1999 19:15:33




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
Definetly the angle grinder... 4 or 5 inch. Much more useful/versatile than a die grinder.

My Makita has been used and abused and is still ticking...

The heavy duty Milwaukee stuff is pretty good as is the Bosch....



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Alan K

12-25-1999 15:05:13




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
My 4.5" Milwakee bit the dust quite easily. I then bought a Bosch 4.5" and its a better machine. I also sent the Milwakee to a service center to have as a backup but that was very expensive.



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jf

12-25-1999 09:17:22




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
I have a 5" makita that I like a lot. It has the handle grip like the big ones do so it is easier for me to hang on to, plus it is still light enough not to wear me out. You can also put a wire wheel on them. (rated for 10,000 rpm of course). The wire wheel is a big help for cleanup of rust, welding spatter and slag.



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Bill From Ontario

12-24-1999 19:35:36




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
I tried a lot of cheaper stuff over the years, then I discovered the Walter/Metabo line. Their 4 1/2" grinder, in my opinion, is the best on the market. I've used and abused one for the last ten years, and haven't been able to destroy it. The only thing I've done was replace the cord. You get what you pay for.

http://www.metabo.com/



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Fred Martin

12-24-1999 14:47:07




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
Don't believe I'd go with a 4" angle grinder nor one with metric threads on it. Be sure and go with a 5/8 11 threaded spindle 4 1/2"er. Then you can use those worn out 7"ers that your friend throws away.( Cheaper that way) If your smart enough to adapt a Jacobs chuck to 5/8 11, maybe you can use it for a gettin by die grinder. They have about 10,000r's. As far as I'm concerned the foreign made $20. are okay the first time out. Fred from the Mung Factory

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bo

12-24-1999 08:08:35




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 Re: Die Grinder or Angle grinder/sander? in reply to TMAC, 12-24-1999 07:42:59  
4 inch angle grinder, high quality like Dewalt or porta cable and not air. electric. Super necessary and versitile. no question about it. bo



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ericc

12-31-1999 04:59:02




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 Re: Re: Die Grinder or Angle grinder/sander? in reply to bo , 12-24-1999 08:08:35  
I bought an angle grinder (a sears heavy duty unit, made by someone else) a few years ago and it is one of the most used tools around the shop. I recommend a 4.5 inch unit. Also, Bo is correct- buy an electric one. Don't waste your time with an air grinder, unless you have a very large air supply. Let me tell you why. Many of us guys have single stage compressors in the 5 HP category, with anywhere from 30 to 80 gallon tanks. The angle grinders tend to take a fair amount of air, with some rated for up to 10 CFM. What happens is that as you deplete your air tank a little, your compressor will kick in and will pretty much run constant as you use your air-sucking grinder. So what you have is a 5 HP motor running almost continuously to power the grinder. It uses alot of juice- 5HP times 746 watts per HP is 3730 watts of power. Compare that to 115 V times 12 A or so which is 1380 watts for the electric grinder. Then you have your compressor working alot and wearing and you are wearing the grinder. My advice is to just go electric- it is more efficient and easier to use with the cord and all. Buy the 1/4 inch disks. I find that the 1/8 inch ones wear pretty quickly.

best of luck,

eric c

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RickB.

12-24-1999 12:12:07




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 Re: Re: Die Grinder or Angle grinder/sander? in reply to bo , 12-24-1999 08:08:35  
I agree, if I could only have one, it would be a 4" grinder.



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charlie

12-24-1999 09:48:49




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 Re: Re: Die Grinder or Angle grinder/sander? in reply to bo , 12-24-1999 08:08:35  
bo's right.an electric 4 inch is the best way to go.a cord is easier to handle than a hose.as far as a die grinder stay with a right angle type.other tools to consider are a 14 inch chop saw and a 4 inch angel clamp.good luck



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