Milwaukee 4-1/2″ Small Angle Grinder 6121-30

By Robert Robillard on Tool Reviews

Milwaukee 4-1/2″ Small Angle Grinder 6121-30 Review

There’s not a lot to say about the Milwaukee 4-1/2″ Small Angle Grinder 6121-30.  This Milwaukee grinding tool is great.  At 5.4 pounds, this too was just the right weight and size to hold and maneuver.

I used it to smooth a very rough and extremely uneven concrete wall so that I could mount a wall hung laundry sink FLAT on the wall and found the trigger easy to engage and disengage. I also used it to remove rust from a metal and it worked well asn was comfortable to use.

The 6121-30 has a trigger lock so you don’t have to hold down the trigger for it to run for long periods of time. One press of the button and it disengages it and shuts off the tool. It took more than few times for me to get used to it but with a little practice it’s easy.

The 6121-30has Overload Protection to maximize motor life, an Electronic Clutch that extends tool life and helps prevent bind-up, Line Lock-Out that prevents automatic start-up after power loss, and a Soft Start.

One of the best features is the tool free design, that allows you the hub bed wheel without a wrench.


  • Powerful 11 Amp, 11,000 RPM Motor
  • Overload Protection
  • Electronic Clutch: prevents bind-up
  • Tool-Free Accessory Change without a wrench
  • Tool-Free Adjustable Guard
  • Advanced Airflow System: Maximizes airflow and reduces debris from getting into the motor
  • Debris Baffles – protect internal components by deflecting damaging debris out of the airflow at the intake vents
  • External Brush Doors – reduces service time by providing easy access to brushes
  • Trigger Grip Handle

I really liked this grinder.  You can find it for $ 109.00 online here: Milwaukee-6121-30-2-Inch-Grinder-Trigge

Product reviews on this site contain our opinion of a product or service. I will always strive for objectivity and transparency in my reviews. My goal is to provide readers with honest, objective information based on my training and experience. I never have and never will accept payment in exchange for a positive review. Many of the products that I review are provided free by a manufacturer. In some cases, we also have advertising or affiliate relationships with manufacturers and retailers of products and services we review

If you enjoyed this post, make sure you subscribe to my RSS feed!

About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

All posts by Robert »

Not what you're looking for?

Search for more articles here. Enter keywords like roof leak, bookcase, deck, etc to find your topic.

© Copyright 2019 A Concord Carpenter · All Rights Reserved