Makita GA7021 (15 Amp 7 in. Corded Angle Grinder with AC/DC Switch)
By Makita · Angle Grinders · Power Tools
- Wheel 7 in
- Motor 15 A, 120 V
- Speed 6,600 RPM
- 3-position side handle
Lowest price seen
~$209.00 (approx.)
from $209.00 at Amazon
- Amazon ~$209.00 (approx.)View at Amazon
- MakitaView at Makita
- eBay (used) eBay: used, open-box, refurbishedView at eBay (used)
- eBayView at eBay
- Tool NutView at Tool Nut
Prices are snapshots. Check the current price with the store.
Summary
A 7-inch corded angle grinder with a 15 Amp motor and an AC/DC switch that runs from generators. Check whether you need that generator compatibility before you buy — the model appears older or discontinued.
Strengths
- The AC/DC switch runs from generators, uncommon in modern grinders and useful on job sites.
- Externally accessible brushes cut downtime for brush replacement.
- Labyrinth construction and zig-zag varnish seal out dust in heavy environments.
- Spiral bevel gears handle metal fabrication and masonry work.
- The tool-less wheel guard adjusts quickly without a tool.
- Makita provides an official parts breakdown with all component part numbers.
Weaknesses
- The model appears older or discontinued, which may limit parts and warranty service.
- No independent test from established tool review outlets was found.
- Owner discussion threads were inaccessible during research, so no failure-rate data exists.
- At $182.99 from CPO Powertools, it competes with modern grinders that may offer updated features.
- Cord length and arbor size are not verified.
Verified specifications
| Model | GA7021. |
|---|---|
| Wheel size | 7 in (180 mm). |
| Motor | 15 A, 120 V. |
| Speed | 6,600 RPM. |
| Side handle | 3-position adjustable. |
| Switch | AC/DC compatible. |
| Brushes | externally accessible. |
| Gearing | spiral bevel gears. |
| Construction | labyrinth seal against dust and debris. |
| Armature protection | zig-zag varnish. |
| Spindle thread | 5/8 in (15.87 mm) or M14, country specific. |
| Max wheel thickness | 6.5 mm (1/4 in). |
| Overall length | 473 mm (18-5/8 in). |
| Net weight | 5.5 kg (12.2 lbs). |
| Shipping weight | 13.8 lbs. |
| Vibration | 5.0 m/s2 (surface grinding, normal grip); 4.5 m/s2 with anti-vibration grip. |
| Noise | 89 dB(A) sound pressure, 100 dB(A) sound power. |
| Safety class | II (double insulation). |
| UPC | 088381-070768. |
| Included | 7 in grinding wheel, tool-less wheel guard, side handle, inner flange, lock-nut, wrench. |
| Warranty | 1 Year-30 Day. |
Full research notes and sources
Generator compatibility and the AC/DC switch
The GA7021’s distinguishing feature is its AC/DC switch, which allows operation from DC power sources such as generators. This is uncommon in modern grinders and valuable for job site flexibility where mains power is unavailable. If you need a 7-inch grinder that runs from a generator, this model remains relevant on the used market.
Dust protection and serviceability
Makita built the GA7021 with labyrinth construction to seal out dust and debris, and zig-zag varnish on the armature for additional protection. These features are aimed at dust-heavy environments such as metal fabrication shops and masonry work. The externally accessible brushes are a serviceability feature that reduces downtime for brush replacement. The official instruction manual specifies a 15-degree optimal grinding angle and a break-in procedure for new wheels.
Parts, warranty and availability
Makita provides an official parts breakdown document for the GA7021, listing all component part numbers including armature, field, bearings, gears, switch, and brush set. The USA product page states a 1 Year-30 Day Warranty. However, the model was listed on Makita USA’s website with captures from August 2019 through May 2026 but is not found on the current Makita New Zealand product catalog, suggesting limited regional availability or discontinuation. CPO Powertools lists the GA7021 at $182.99.
Is it worth it?
For buyers specifically needing AC/DC generator compatibility in a 7-inch grinder, the GA7021 remains a relevant option on the used market. For new purchases, modern alternatives with current warranty support and verified parts availability may be preferable unless the AC/DC feature is specifically required.
Which model this is
This page covers the Makita 7 in. 15 Amp Corded Angle Grinder with AC/DC Switch, model GA7021. The Amazon listing is ASIN B000I6QWQM. Do not confuse it with the GA7020, GA7022, or GA7040, which are different 7-inch Makita grinders.
Sources
Manufacturer:
- Makita USA - Product Details - GA7021
- Makita GA7021 Parts Breakdown
- Makita GA7021 Instruction Manual (free-instruction-manuals.com)
Independent reviews:
- None found. No dedicated independent test from established tool review outlets was identified for this model.
Owner reports:
- None accessible. Reddit and forum searches were blocked during research.
Parts and stores: