Chicago Pneumatic CP9121BR 5-Inch/127 mm Angle Grinder

I bought this to replace my Ingersoll Rand 3445 air angle grinder. What's not clear in the descriptions is: Is the red body of the CP9121 plastic or metal? I glad to report IT IS DEFINITELY METAL. Very likely powder-coated aluminum. (Of course I don't want to scratch it and see for sure.) This unit has the rugged build I was looking for. I noticed what looks like this exact same grinder, same color, under different branding and very close to the same price elsewhere, but sorry, I forgot the exact brands.Note: If money is no object you should also be looking at the Ingersoll Rand G2 series grinders, which are supposed to be super industrial duty.Another competing product is the IR 3445. I had the first version of the IR 3445 (the non-MAX version) and it broke within a year. (I use these for removing mill scale from structural steel.) Although I am partial to IR air tools, I will never get a "composite construction" (read metal/plastic) air tool again. One drop and the housing cracked at the aluminum/plastic joint, and IR doesn't sell the plastic replacement part separately. You have to buy a whole new housing which costs $100 minimum.This (the CP9121) seems a little more noisy than the my previous grinder, but heck, I'm always wearing ear muffs anyways. I will gladly trade the slight noise difference for something durable.

Description says this has a “spindle lock for easy grinding wheel changes.” It does not have a spindle lock and requires tools.

Works great just keep it oiled.

Chicago Pneumatic CP9121BR Heavy Duty 5-Inch Angle Grinder with 5/8-Inch, 11 SpindleI have purchased two of these grinders and will continue to use these as replacements for years to come. These grinders are put to the test in a large metal fabrication shop. The company I work for has been through many different pneumatic grinders over the years, and for the money, these are the best I've found.

It just shot craps after just 3 years of moderate use.