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Internet # 202312077

Model # GA4030K

Store SKU # 649247

6 Amp Corded 4 in. Lightweight Angle Grinder with Grinding Wheel, Wheel Guard Side Handle Hard Case

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  • 6 AMP motor delivers 11,000 RPM for most demanding applications
  • Labyrinth Construction protects the motor from dust and debris
  • 2x longer service life than competitive models
  • View More Details

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Product Details

About This Product

Makita's 4-Inch Angle Grinder, model GA4030K, combines power with comfort and motor-protection features for longer-lasting performance for a range of industrial grinding applications.6 AMP Motor Delivers 11,000 RPM: The GA4030K is powered by a Makita-built 6 AMP motor that delivers 11,000 RPM for the most demanding applications. The machined bevel gears are engineered for longer tool life, and the all ball bearing design and metal gear housing deliver added durability. The labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life. In addition, the armature is sealed by a protective zig-zag varnish which prevents contamination by creating a barrier under rotation.

Highlights

Product Information

Internet # 202312077

Model # GA4030K

Store SKU # 649247

Specifications

Dimensions: H 3.75 in, W 4.625 in, D 10.5 in

Dimensions

Product Depth (in.)

10.5 in

Product Height (in.)

3.75 in

Product Width (in.)

4.625 in

Wheel Diameter (in.)

4 in

Details

Amperage (A)

6 A

Arbor Size

M10

Color Family

Teal

Cord Length (ft.)

8.2 ft

Corded Tool Type

Angle Grinder

Cordless/Corded

Corded

Electronic Speed Control

No

Maximum Speed (RPM)

11000 RPM

Power Tool Features

Lock On Switch, Spindle Lock

Product Weight (lb.)

3.7 lb

Returnable

90-Day

Tools Product Type

Power Tool

Variable Speed

No

Warranty / Certifications

Manufacturer Warranty

1 Year Warranty on tool

Questions & Answers

Does this grinder have brushes? If it does are they replaceable? I had the previous model, and I replaced the brushes 3 times before the plastic switch handle broke in half. It was a great grinder for me.
ByMay 5, 2026
1 Answer | 
Answer This Question

Thank you for your question on the GA4030K 4" Angle Grinder, with tool case. Yes, the GA4030K 4" angle grinder has brushes and they are replaceable.

By|May 5, 2026


    Does this grinder have soft start?
    ByMar 1, 2026
    1 Answer | 
    Answer This Question

    Thank you for your question about our GA4030K 4" Angle Grinder, with tool case. No, this tool does not have a slow start feature. This tool has a constant No Load Speed of 11,000 RPM.

    By|Mar 3, 2026


      Can I purchase the tools to change the disc for this grinder?
      ByJan 2, 2026
      1 Answer | 
      Answer This Question

      Thank you for your question. We recommend you contact your local Makita distributor. You can find your local Makita distributor by calling 1-(800)4-MAKITA, or at the “Services” link at www.makitatools.com.

      By|Jan 3, 2026


        Can it cut tile?
        ByOct 8, 2025
        1 Answer | 
        Answer This Question

        Thank you for your question about the 6 Amp Corded 4 in. Lightweight Angle Grinder with Grinding Wheel. This tool is Ideal for welders, fabricators, masons, maintenance/repair and more. You can cut tile with a continuous rim. However, Makita does not make that type of blade that can fit your model.

        By|Oct 9, 2025


          What’s is the arbor size?
          BySep 6, 2024
          1 Answer | 
          Answer This Question

          Thank you for your question. The GA4030K 4" angle grinder has an arbor size of M10 x 1.25.

          By|Sep 10, 2024


            Where is it made?
            ByJun 22, 2024
            1 Answer | 
            Answer This Question

            Thank you for your question. The GA4030K 4" angle grinder is manufactured in China. Please be advised that all of the Makita corporation's manufacturing centers around the world are held to the same Quality Criteria.

            By|Jul 1, 2024

              (1)

              Will it cut 3/4” granite with a continuous diamond blade?
              ByJan 8, 2024
              2 Answers | 
              Answer This Question

              No, this tool is too light weigh for your job. Mike

              By|Jan 9, 2024

              Thank you for your question. The GA4030K angle grinder is designed for demanding applications including cutting brick and masonry, cutting ferrous metal, paint and rust removal, shipyard maintenance, heavy machinery, metal polishing, general grinding, auto repair work, and cutting limestone.

              By|Jan 9, 2024


                I have an old Makita 4 inch angle grinder. I need a wire cup wheel 4 angle grinder. It needs a 3/8 spindle that seems to have 20 DPI. Can you point me to the proper wire cup wheel either here or at another distributor? Thank you very much.
                ByOct 24, 2023
                1 Answer | 
                Answer This Question

                Thank you for your question. To better assist you, please call the Makita Call Center during business hours at (800)4-MAKITA, they’re based in the Flowery Branch, GA, and are ready to help.

                By|Oct 24, 2023


                  Viewing 1-8 of 23

                  Customer Reviews

                  4.5 out of 5

                  • 4.5 out of 236 reviews
                  • 83% recommend this product
                  Filter by:
                  Showing 1-10 of 236 reviews
                  Best grinder ever!
                  I have been welding for almost 8 years. This is the first grinder I got, and it's a champ! No other can compare. It's lightweight and easy to use with 1 hand, being a woman this is a major bonus. Also, the fact that you can get the 5/8 " adapter nut so you can put a 4.5" wheel on it is super convenient. Makita grinders are without a doubt the best for daily use.
                  by
                    • Recommended
                    4 found this review helpful
                    It's a great and simple to use grinder...
                    It's a great and simple to use grinder
                    by
                    • Verified Purchase
                    They really screwed up the on-off switch compared to the previous N9514B model I had. This switch...
                    They really screwed up the on-off switch compared to the previous N9514B model I had. This switch is a rocker that you "lock in" by pushing down on the top after you slid it forward. It is incredibly sensitive so that any time you grasp it near the top of the handle it will go off. Very annoying especially when you are 20' up on a ladder! The old model was a slider that locked front and back. It also had walls built up on both sides so your hand would not touch the switch when you grasped around it. I'm forced now to jam some thin cardboard under the rocker to keep it on. Once on it works just fine, a little bit heavier, 1 amp more power and all old 4" discs and my depressed rubber pad kit still fit.
                    by
                      3 found this review helpful
                      Could have bought online around same price and had delivered to my door but wanted to look at it ...
                      Could have bought online around same price and had delivered to my door but wanted to look at it before buying. I went to H.D. and picked it up, checked it out. I have 2 of the older 4" Makita grinders (2002 & 2005). I have ran them hard many times. They had straight cut gears and over the years have really got sloppy and noisy. BUT they have never quit running. I took one apart and greased and it helped noise some but still it was wore out. I bought the new Makita and tried it out this morning. It works great and way quieter. Thank Makita for making a good 4" grinder. I have 4.5", 5", 7" grinders also but these 4" ones are light and small to work in tighter quarters. I will buy another soon.
                      by
                        • Recommended
                        2 found this review helpful
                        older versions of this model did not hold up for long
                        I have owned 2 older versions of this same model, and either the commutator bearing froze or the armature burnt out and the arcing melts the case. And I use compressed air to clean out the dust after each use as recommended. Trouble is MAkita has the weakest 1 year warranty of the bunch, and that is about how long this model held up. Other trouble is MAkita has one of the only 3/8 " arbor grinders out there and I still have a large selection of discs and wheels to fit this size. Rock and HArd place I am between.
                        by
                        • Pro
                        14 found this review helpful
                        Heavy duty work horse for a little tool!!
                        by
                        • Verified Purchase
                        This customer chose to rate the product and not provide text.
                        by
                        • Verified Purchase
                        This customer chose to rate the product and not provide text.
                        by
                        • Verified Purchase
                        Small compact lightweight yet still has enough torque to do the job. Some of the battery operated grinders are large heavy and they just don’t fit into the tighter spaces.
                        by
                        This customer chose to rate the product and not provide text.
                        by
                        • Verified Purchase
                        Showing 1-10 of 236 reviews

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                        Product Snapshot

                        Suitable for both professionals and home users seeking powerful performance, this grinder features a 6A motor and 11, 000 RPM. The grinder includes a convenient sliding switch and spindle lock.
                        Great for homeowners looking for a compact and powerful angle grinder, making grinding tasks easier and more efficient.
                        Built for long-lasting durability and high performance, this angle grinder offers powerful grinding with comfort and dust protection.
                        Suitable for both professionals and home users seeking maximum performance and durability. This grinder features overload protection, electronic clutch, and a slim paddle design for increased control and reduced fatigue.

                        Disc Size

                        4 in
                        4.5 in.
                        4.5 in.
                        4.5 in

                        Power Output

                        6 A
                        7.5 A
                        7.5 Amp motor, 11, 000 RPM
                        11 A

                        Speed Control

                        Dust Protection

                        Safety Features