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Had the same model grinder for 10 years and finally wore it out. It was a no brainer to replace it with the same model. This unit is a heavy duty grinder, the gear drive never showed a lick of wear. I use this grinder for all kinds of grinding with any style of grinding wheel and flapper discs.I would highly recommed it to both the project user and the professional.
And does the job quickly too. I've used it for many jobs where it would have been difficult or impossible to use any other tool. This tool is excellent. Also, Milwaukee makes and sells several other models similar to this grinder, and they are all worth getting, particularly if you want a more professional tool. It's most useful aspect is that you can get into difficult to reach, small spaces, and with an appropriate thin cut-off wheel which you can buy, saw through anything. I used it to cut 4" cast iron sewer lines in a confined space underground with no problems. I'm a home hobbyist, and the 6148 works great for me. I threw away my hacksaw.
I spent a lot of time looking into my grinder purchase. I am not wealthy and can only afford to buy it once.This is the best I could find in it's class.
I chose this model because I simply planned to use it to remove rust, bondo and welds from mild steel, not needing the large unwieldy models for masonry work. I also liked the safety paddle switch that prevents accidental turn on.This product has exceeded my expectations, and performed well in every task I've used it for. It is very powerful (watch out, this tool can injure your wrist) runs cool even with heavy use and functions well as a cutoff tool. With a sanding back, it will handle any orbital sanding duties required.The wrench supplied for wheel removal is a joy to use and far stronger than needed for the task of changing discs.The only reason I gave it four stars is the lack of spiral bevel gears like the 6140 model; it deserves five in every other aspect.
Now its even less $. I am a part time remodeler. With a husky 4 1/2" metal blade (about $12 at HD-great blade/great price) this grinder can cut through concrete patio blocks almost by itself. I chose the 8.5 amp model instead of the 12 amp because I do not use a grinder every day.
For my uses it has worked great. Metal or masonry work daily would require a 12 amp 4 1/2" or bigger. I paid $90 and change for this grinder. I read lots of reviews, but rarely write them. There has been no effect on performance, it works fine-just a concern. I have used it to cut off 2" solid steel stock and lots of concrete material.
This model also has a paddle switch which I find to be safer and more accurate to use. There are generally no brakes on grinders and the paddle switch is helpful for control.
I guess time will tell. I have had this grinder for 3 months now.
The reason I gave it 4 stars is if I press the switch and turn on the grinder without cutting anything and just let the switch go and the blade rotates to a stop there is a noise in the head that sounds like sloppy bearings or something. Milwaukee is plenty powerful.
When you push in the switch the entire grinder will want to twist-hold on. I didn't notice it when it was new but it could be nothing.
Excellent performance.
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