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![IDM AG-B125 [4.0A-20V] CORDLESS ANGLE GRINDER MACHINE [CORDLESS KIT - (INC. BATTERY (2PCS) | CHARGER | ACCESSORY) [G - 240V]] [Makita Type] - 30268](http://www.idealpowertools.com/cdn/shop/files/IDMAG-B125_30268.jpg?v=1766381571&width=3792)
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IDM AG-B125 [4.0A-20V] CORDLESS ANGLE GRINDER MACHINE [CORDLESS KIT - (INC. BATTERY (2PCS) | CHARGER | ACCESSORY) [G - 240V]] [Makita Type] - 30268
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Professional Cordless Power, Engineered for the Toughest Jobs.
The IDM AG-B125 20V Cordless Angle Grinder is a professional-grade, brushless motor power tool engineered for demanding metalworking, cutting, and grinding applications. Weighing just 2kg and powered by a 4.0Ah Lithium-Ion battery, it delivers variable speeds up to 8,500 RPM with a 125mm wheel capacity, giving tradespeople and serious DIYers the freedom to work without limits. Built with double insulation, a metal gearbox, and CE-certified construction, this cordless kit is ready for the job site straight out of the box.
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- High-Efficiency Brushless Motor with Variable Speed (3,000–8,500 RPM): Unlike conventional brushed motors, the IDM AG-B125's brushless motor eliminates friction-based energy loss, converting more battery power directly into torque. The trigger-responsive variable speed system lets you dial in the exact RPM for the task, low speed for controlled tile scoring, mid-range for surface grinding, and full 8,500 RPM for aggressive metal cutting, all from a single tool.
- 20V 4.0Ah Lithium-Ion Dual Battery Kit (IDM BT-4A) with LED Indicator: The kit includes two high-capacity 4,000mAh Li-Ion battery packs, ensuring continuous operation with one always on charge. The onboard LED battery level indicator provides a real-time charge status readout, eliminating unexpected shutdowns mid-task. The 220–240V / 50–60Hz compatible charger ensures global usability.
- 125mm Wheel Capacity with M10 Spindle Thread and Spindle Lock: Accepts both 125mm cutting wheels and 125mm grinding wheels with a 16mm aperture, covering the most common disc sizes used in professional trades. The M10 spindle thread is the industry standard, ensuring broad disc compatibility. The integrated spindle lock mechanism allows single-handed disc swaps without additional tools, reducing downtime significantly.
- Double Insulation and Robust Metal Gearbox Construction: The double-insulated housing ensures that live electrical components are fully isolated from the outer casing, providing a critical layer of protection against electric shock, particularly important in wet or conductive environments. The metal gearbox delivers smooth, efficient power transmission from motor to spindle, resisting heat and wear under sustained heavy-duty use. This unit is CE certified, confirming compliance with European safety and electromagnetic compatibility standards.
- Compact 2kg Lightweight Design with PVC Carrying Case: At just 2 kilograms, the AG-B125 significantly reduces operator fatigue during extended overhead or confined-space work. The super-compact form factor improves access in tight areas where larger grinders cannot reach. The included PVC carrying case stores the machine, both batteries, charger, cutting wheel, and grinding wheel in a single organised, protective unit, ideal for transport between job sites and secure long-term storage.
General Purchase & Comparison Queries
Does this kit include everything I need to start working immediately?
Yes. The IDM AG-B125 is sold as a complete cordless kit. It includes the angle grinder machine, two IDM BT-4A 4.0Ah 20V Li-Ion batteries, a 220–240V compatible charger, one cutting wheel, one grinding wheel, a guide book, and a PVC carrying case — everything required to begin cutting and grinding straight out of the box, with no additional purchases necessary.
Is this compatible with Makita 20V batteries?
The IDM AG-B125 uses the IDM BT-4A 20V battery platform, which is designed for the IDM cordless tool ecosystem. While the product is described as Makita-type in form factor, battery compatibility with third-party brands including Makita is not guaranteed and should be verified before purchase. We recommend using the genuine IDM BT-4A batteries included in this kit to ensure optimal performance, safety, and warranty coverage.
Why choose a brushless cordless grinder over a corded model?
A brushless cordless angle grinder like the IDM AG-B125 offers three key advantages over corded alternatives. First, complete portability — no power outlet or extension cable required, making it ideal for outdoor, rooftop, or remote job sites. Second, the brushless motor is more energy-efficient than brushed motors, delivering longer runtime per charge and a significantly longer motor lifespan. Third, the variable speed trigger gives you precision control that many fixed-speed corded grinders cannot match.
Product-Specific and Usage Queries
What materials can the IDM AG-B125 cut and grind?
The IDM AG-B125 is designed for a wide range of materials. With the included cutting wheel, it handles steel, iron, metal pipes, rebar, and sheet metal with a maximum cutting depth of 25mm. With the included grinding wheel, it is suited for surface grinding, weld seam removal, rust stripping, and deburring on metal surfaces. Using appropriate aftermarket discs (sold separately), it can also be used for tile scoring, concrete grinding, and masonry work.
How do I change the disc on this angle grinder?
The IDM AG-B125 features a spindle lock mechanism that allows for quick, single-handed disc changes without the need for a separate spanner. To change the disc: first ensure the battery is removed for safety. Press and hold the spindle lock button to immobilise the shaft, then unscrew the locking nut and remove the old disc. Place the new 125mm disc (16mm aperture, M10 thread compatible) onto the spindle, refit the locking nut, and tighten securely while holding the spindle lock. Reinsert the battery before use.
What is the battery runtime and how long does it take to charge?
Runtime depends on the speed setting and material being worked. At full 8,500 RPM under heavy load, expect shorter bursts; at lower speeds the 4,000mAh (4.0Ah) IDM BT-4A battery provides extended continuous use. The kit includes two batteries, so one can charge while the other is in use, effectively eliminating downtime. The charger operates on 220–240V / 50–60Hz. Specific charge time will vary; refer to the included guide book for exact figures.
Problem/Solution-Oriented Queries
The grinder feels hot during extended use — is this normal?
Some warmth during sustained operation is normal for any power tool. However, the IDM AG-B125's brushless motor is specifically engineered to minimise heat generation by eliminating the friction caused by carbon brushes in conventional motors. If the tool becomes excessively hot, allow it to cool before continuing — this protects both the motor and the battery. Avoid running the grinder at maximum RPM continuously for extended periods; use variable speed control to match the workload and reduce thermal stress.
My battery indicator shows low charge quickly — what should I check?
If the LED battery level indicator drops quickly, first ensure the battery is fully charged before use — a partial charge cycle can give misleading runtime. Li-Ion batteries also perform best within moderate temperature ranges; extreme heat or cold reduces effective capacity. If the issue persists after a full charge cycle, check that you are using the genuine IDM BT-4A battery and the correct charger. Using non-compatible batteries or chargers can result in reduced performance and may void the warranty. Contact your supplier if the issue continues after these checks.
Can I use third-party 125mm discs with this grinder?
Yes. The IDM AG-B125 accepts any standard 125mm diameter disc with a 16mm aperture and M10 spindle thread — the most widely used specification in the industry. This means you can use compatible cutting discs, grinding wheels, flap discs, wire cup brushes, and polishing pads from reputable third-party brands. Always ensure that any disc used is rated for a minimum speed of 8,500 RPM (the tool's maximum) and is appropriate for the material being worked. Never use damaged, cracked, or undersized discs.
Machine (1 Pcs), Guide Book (1 Pcs), PVC Carrying Case (1 Pcs), Battery [IDM BT-4A] (2 Pcs), Charger (1 Pcs), Cutting Wheel (1 Pcs), Grinding Wheel (1 Pcs)