Scroll To Top
5" SJS™ Angle Grinder, with AC/DC Switch

5" SJS™ Angle Grinder, with AC/DC Switch

  • POWER : 10.5 AMP motor delivers 11,000 RPM
  • PERFORMANCE : SJS™ technology is a mechanical clutch system that helps prevent motor and gear damage
  • DURABILITY : Labyrinth construction, zig-zag varnish and thicker coil wires for longer tool life
  • DESIGN : Electric brake; no lock-on/lock-off AC/DC switch
  • INCLUDES : Grinding wheel, wheel guard, side handle, inner flange, lock-nut and wrench
5" SJS™ Angle Grinder

About Model

Makita’s 5” SJS™ Angle Grinder combines 10.5 AMP power with comfort and motor-protection features for longer-lasting industrial performance. The GA5020 is engineered with Makita’s innovative - SJS™ technology is a mechanical clutch system that helps prevent motor and gear damage

10.5 AMP Power with SJS™ to Protect Gears

The GA5020 is powered by a 10.5 AMP motor that delivers 11,000 RPM, with electric brake for maximum productivity. Labyrinth construction protects the motor with a complex set of channels, prohibiting dust and contamination. In addition, the protective zig-zag varnish seals the motor and bearings from dust and debris by creating a barrier under rotation. The GA5020 is engineered with SJS™, an innovation from Makita that protects the gears by automatically disengaging the motor should the grinding wheel accidentally catch or bind.

The GA5020 weighs only 5.9 lbs. and is built with comfort and ergonomic features for extended use, including an ergonomic rubberized rear handle with trigger switch. In addition, the side handle can be easily installed on either side of the tool. It is a versatile and powerful grinder engineered for demanding applications including cutting, ferrous metal, paint and rust removal, shipyard maintenance, heavy machinery, metal polishing, general steel grinding, auto repair work, cutting brick and masonry, and restoration work. The grinder is built for welders, fabricators, plumbers, masons, electricians, automotive technicians, stone and tile workers, HVAC, and general contractors.


  • Powerful 10.5 AMP motor delivers 11,000 RPM to handle the most demanding applications
  • SJS™ technology is a mechanical clutch system that helps prevent motor and gear damage by allowing the drive shaft to slip if the wheel is forced to stop
  • Electric brake for maximum productivity
  • Rubberized soft grip handle provides increased operator comfort
  • Rear handle trigger switch with no lock-on feature
  • Tool-less wheel guard for quick and easy adjustments
  • Spiral bevel gears for smoother rotations and a more efficient transfer of energy
  • Zig-zag varnish protects the armature coil from dust and debris for longer motor life
  • Labyrinth construction prevents debris from penetrating the motor, bearings and gears for longer tool life
  • Externally accessible brushes for greater serviceability
  • AC/DC switch for use with alternative power source
SJS Logo (Color on White)



  • Wheel Diameter : 5"
  • AMPS : 10.5
  • No Load Speed : 11,000 RPM
  • Spindle Type : 5/8" - 11 UNC
  • Lock-On Switch : No
  • Lock-Off Switch : No
  • Switch Type : Rear trigger switch
  • Electric Brake : Yes
  • Overall Length : 14"
  • Net Weight : 5.9 lbs.
  • Variable speed dial : No
  • Power Type : Corded
  • Bind-Up Control : Yes
  • AC/DC switch : Yes
  • Shipping Weight : 8.8 lbs.
  • UPC Code : 088381-083249
  • Resources & Media

    Page of Start over