Model#: MKTNGA4542C

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Makita GA4542C SJS II 12 Amp 4-1/2 in. High-Power Angle Grinder

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Product Overview


The Makita SJS II 12 Amp 4-1/2 in. High Power Angle Grinder combines power, convenience, comfort and motor-protection features for longer-lasting industrial performance. It the perfect tool for cutting, grinding, polishing, as well as paint and rust removal. The SJS II mechanism provides a leaf spring and cam gear drive that is engineered to reduce vibration for increased operator comfort during extended use.
  • Electronic Controller is a three-part electronic feature designed to provide the required power in high torque applications for increased tool life
  • Powerful 12.0 amp motor delivers more output with a variable speed variable speed control dial enabling you to match the speed to the application
  • SJS II provides a leaf spring and cam gear drive mechanism that is engineered to reduce vibration and prevent motor damage by dampening the force on the gear when the wheel is forced to stop
  • Motor winding protection features "zig-zag" varnish on the armature and hardened powder on the field coils to act as an impenetrable barrier to dust and debris
  • Labyrinth construction features a complex series of channels to prevent penetration of dust and debris into the field and armature for maximum operational life
  • Removable side handle can be mounted on left or right side of tool
  • 12 Amp 4-1/2 in. High-Power Angle Grinder - GA4542C
  • 4-1/2 in. INOX Grinding Wheel - A-95956
  • Inner Flange - 224399-1
  • Lock Nut - 224568-4
  • Lock Nut Wrench - 782412-6
  • Side Handle - 162258-6
  • Tool-Less Wheel Guard
Compliance and Restrictions
warning: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of those chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically-treated lumber. Refer to product manual/instructionsCancer


Length: 11.87 in.
Width: 5.5 in.
Height: 4.56 in.
Weight: 5.4 lbs.
Amperage: 12
Arbor Size: 5/8 in
Bluetooth Compatibility: No
CSA Safety: No
Case Included: No
Cord Length: 8.2 in
ETL Safety: No
Motor Type: Brushed
No-Load Speed (RPM): 2800-11000
Powered Tool Power Source: Electric - Corded
Spindle Thread: 5/8 in - 11
Switch Settings: Lock-On
Switch Type: Slide
UL Safety: Yes
Variable Speed: No
Voltage: 120V
Wheel Diameter: 4.5 in
Wifi compatibility: No



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Yes (1)
Powerful (1)
Yes, I would recommend this to a friend
Powerful and well built
I do a lot of hobby-level metal work that involves repurposing materials that aren't always in the best condition, so I use an angle grinder a lot to prepare for or after welding. The Makita SJSII makes cleaning rust and old paint go a lot faster, and because it has variable speed control I can use different wheels (such as braided wire) that may not be rated for the full 3,500 rpm. The graduated startup feature makes this grinder a lot easier on the wrists to start, and the vibration reduction is very functional and does help cut down on fatigue from using the grinder for long periods. The grinder does have a 12amp motor, so it is on the heaver/longer end of the spectrum, but I haven't found those factors to be problematic.
March 1, 2016

Questions & Answers

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is this tool made in usa?
A shopper on Jul 17, 2017
BEST ANSWER: No, this is made in Japan.