MAKITA DGA517RTJ
18v Angle grinder - 5" (125mm)
- 2 x 5.0Ah Li-ion batteries and charger
- No load speed: 3000 - 8500rpm
- Brushless motor
- MakPac type 3 case
- 2 x 5.0Ah Li-ion batteries and charger
- No load speed: 3000 - 8500rpm
- Brushless motor
- MakPac type 3 case
- 2 x 5.0Ah Li-ion batteries and charger
- No load speed: 3000 - 8500rpm
- Brushless motor
- MakPac type 3 case
The Makita DGA517RTJ is a high-performance 18V cordless angle grinder, built for demanding grinding, cutting, and polishing tasks. Powered by Makita’s 18V lithium-ion battery platform, this grinder delivers the flexibility of cordless operation with power comparable to corded models, making it ideal for professional on-site applications. The 125mm (5") disc size and variable speed control provide precision and adaptability for different materials. Featuring a paddle switch for added safety, the DGA517RTJ comes as a complete kit with two 5.0Ah batteries and a Makpac case, providing extended runtime and convenient storage.
Key Features:
- 18V lithium-ion battery platform for cordless flexibility and power
- 125mm (5") disc size suited for medium to heavy-duty grinding, cutting, and polishing tasks
- Variable speed control (3,000–8,500 RPM) allows for adjustment based on material and application
- Brushless motor provides greater efficiency, extended runtime, and reduced maintenance
- Active Feedback Sensing Technology (AFT) prevents kickback, enhancing user safety
- Paddle switch for immediate shutdown upon release, adding a layer of protection in high-risk applications
- Electric brake for quick stopping, further improving control and safety
- Soft start feature ensures smooth and controlled startup
- Ergonomic slim barrel grip for comfortable handling and reduced fatigue during extended use
- Includes two 5.0Ah batteries and a Makpac case for longer runtime and convenient storage
Manufacturer’s Technical Specifications:
- Battery Voltage: 18V (Li-Ion)
- Disc Size: 125mm (5")
- No Load Speed: 3,000–8,500 RPM (variable speed)
- Weight: 2.6 kg (with battery)
- Motor Type: Brushless
- Warranty: 1 year (extendable with registration)
Alternative Model: Makita DGA513RTJ 18V Cordless Angle Grinder with Slide Switch and Variable Speed
The Makita DGA513RTJ is an excellent alternative for users who prefer a slide switch. Like the DGA517RTJ, it operates on the Makita 18V battery platform, includes a 125mm disc size, and features variable speed control for versatility. The main difference is in the switch type: the DGA517RTJ uses a paddle switch, which requires continuous pressure to operate and immediately shuts off when released, making it ideal for high-risk tasks where quick shutdown is needed. The DGA513RTJ, on the other hand, is equipped with a slide switch that can be locked into the “on” position for continuous operation, making it more convenient for prolonged tasks but requiring cautious handling for safety.
Both models provide Makita’s trusted quality and performance, with the DGA517RTJ offering enhanced safety through its paddle switch and the DGA513RTJ catering to those who prefer a lock-on slide switch for uninterrupted operation on extended tasks.
An introduction to angle grinders: Angle grinders have a wide variety of uses amongst, for example, engineers, stone masons, welders, bricklayers & scaffolders. The grinding disc is mounted on a head which sits at right angles to the motor's drive shaft. They are occasionally referred to as disc or side grinders. Cordless angle grinders are concentrated at the smaller disc diameter end of this range. Click here to see all our grinders
To choose between angle grinders: Disc diameter is the key choice to make when selecting an angle grinder. They range in disc diameter size from 4' (100mm) - 9' (230mm) with the 4.1/2' (115mm) & 9' (230mm) grinders being the most popular choices. Smaller grinders rotate the discs at a higher speed. These tools all have a 5' disc diameter. Click here to see all our angle grinders
To make sure you've got the right angle grinder - 5' (125mm): Choosing the right battery: Cordless (or battery powered) tools have various chemical battery types; Li-ion is the latest technology, prior to that it was Ni-MH and Ni-Cad was the original. The higher the Ah (Ampere hours) the longer the interval between charges; the fewer times you recharge a battery the longer it will last. Some cordless tools can also come without batteries - also referred to as naked, bare units or body only. These tools are supplied without a battery or charger and more often than not without any accessoires. As a result they are significantly cheaper in price.
Click here to see all our angle grinder - 5' (125mm)

DGA517 is a 125mm, paddle switch, variable speed angle grinder powered by 18V LXT lithium-ion battery.
- Brushless motor
- Variable speed control dial.
- Anti-restart function.
- Electric brake
- Safety Paddle Switch
- Electronic current limiter for overload protection.
- Battery fuel gauge
- Ergonomic soft grip
- Automatic Torque Drive Technology: Automatically changes the cutting speed according to load condition for optimum operation
- Active Feedback Sensing Technology (AFT): Shuts down the tool to protect the user if the rotation speed suddenly slows down
- Removable dust covers
- Soft start.
- Noise K factor: 3 dB(A)
- Noise sound pressure: 79 dB(A)
- Vibration: Disc Sanding: 2.5 m/sec²
- Vibration K factor: 1.5 m/sec²
- Max Wheel Thickness: 7.2 mm
- Battery Quantity (5.0ah): 2
- No Load Speed: 3,000#-#8,500 rpm
- Bore Diameter: 22.23 mm
- Battery Type: Lithium-ion
- Max Wheel Diameter: 125 mm
- Net weight: 2.4 - 3.1 kg

- 1 year warranty can be extended to 3 years by registering the tool online within 30 days of purchase, subject to the following conditions:
- the tool is CE marked and was purchased on or after 1st July 2012
- the tool is not an Air Compressor/ Air Tool, a Battery/ Charger, an Accessory, or a Petrol or Production Tool - To register your tool for extended warranty click here
- Warranty claims: Please request a collection from Makita using their returns form. Alternatively, you can speed the process up by taking the tool to your nearest approved Makita Area Service Agent. You can find your nearest agent here. When searching for your nearest agent on the website you will need to select the 'Service - Electric' tick box for a power tool warranty claim, or the 'Service - Garden Machinery' tick box for a garden tool warranty claim. Please contact Howe Tools should you need any assistance.
- You can order until 8pm for free next working day delivery to nearly all of England and Wales. For locations further from our hub, our cut off is 5pm. Some harder-to-reach locations may take an extra day. More info »
- For most orders we use a premium carrier that notifies you of a one hour timed delivery slot and sends text updates.
- If you change your mind within 30 days of buying a tool, not a problem (assuming the tool has not been used and is in its original packaging) - call us on 0333 004 3000 or email us at [email protected] and we’ll contact you to arrange collection. Once the tool is received back, we will refund the cost of the tool less a £6 collection charge.
- If the tool is faulty within 30 days of buying it, we will arrange for its collection at no cost to you and supply a replacement.
- If the tool is faulty after 30 days of buying it, and before the expiry of the manufacturer’s warranty, we will guide you through the manufacturer’s warranty process.