Ridgid
Ridgid 18V Brushless R86047 Angle Grinder
Ridgid's current 18V flagship grinder (May 2022), superseding the Octane-era R86042B with a brushless motor Ridgid rates at up to 25% more power than its predecessor. Runs 4-1/2-inch wheels at 9,000 RPM with an electric brake, a grip-spanning paddle switch, tool-free guard and wheel changes via a folding-tab flange nut, and a 2-position side handle. Sold exclusively at Home Depot; registering unlocks Ridgid's free-parts-and-service Lifetime Service Agreement.
Specifications
Features
Pros
- ✓4.5-star average across 481 Home Depot reviews - owners repeatedly say it 'competes with high-end grinders at a fantastic price point'.
- ✓Electric brake stops the wheel quickly when the paddle is released - a feature Ryobi's same-price grinder lacks.
- ✓Tool-free guard adjustment plus a simplified folding-tab flange nut make wheel changes wrench-free.
- ✓Slim rubber-overmolded grip drew specific praise from Pro Tool Reviews for comfort during extended use.
- ✓Compact 13.3-inch length is maneuverable in tight spots, and 4.5 lbs bare keeps overhead fatigue down.
- ✓Lifetime Service Agreement (free parts and service with registration) is unmatched by any other brand in this class.
- ✓MAX Output batteries boost performance, and the $219 kit with a 4.0Ah MAX Output pack undercuts pro-brand kits.
- ✓Owners describe it as well-balanced and comfortable one- or two-handed.
Cons
- ✗Pro Tool Reviews pegs output at roughly a 9-amp corded grinder - light-to-medium duty, not a Bosch ProFactor/Flex-class powerhouse.
- ✗9,000 RPM and 4-1/2-inch wheels only - no 5-inch capacity or variable speed.
- ✗No kickback/bind-up shutoff electronics like Bosch KickBack Control or Makita AFT.
- ✗Home Depot exclusivity means no price competition between retailers and thinner accessory availability.
- ✗Paddle switch has no lock-on, which some users find fatiguing for long grinding sessions.
- ✗Ridgid's 18V platform is smaller than DeWalt/Milwaukee, so the grinder mostly makes sense if you're already invested.
- ✗Lifetime Service Agreement requires registration within 90 days - miss it and you fall back to the 3-year warranty.
Common Questions
How much grinder do you actually get for $139?
Does it have an electric brake?
Are wheel changes really tool-free?
What's required to get the Lifetime Service Agreement?
What are its hard limits?
Compare the Ridgid 18V Brushless R86047 Angle Grinder
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