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Brushless
Cordless
Die Grinder
CE Certified
GS Approved
ETL Listed
RoHS Compliant
Brushless Cordless Die Grinder
Brushless Cordless Die Grinder - High-speed precision grinding and deburring with intelligent speed control and total cordless freedom
No-load Speed5,000 – 25,000 RPM
Collet Size1/4 inch (6.35mm)
Motor TypeHigh-Speed Brushless
Battery Voltage20V Max Li-Ion
Our Products
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Product Introduction
Precision Grinding Power, Unleashed From the Cord
The brushless cordless die grinder redefines what a portable grinding tool can accomplish on the modern industrial floor. Designed for professional metalworkers, automotive technicians, and maintenance engineers, this tool eliminates the restrictions of pneumatic hoses and corded power while delivering rotational speeds up to 25,000 RPM. The high-frequency brushless motor provides consistent torque output across a wide speed range, ensuring that burr removal, internal grinding, and surface preparation tasks are completed with repeatable precision regardless of operator location or job complexity.
The variable speed dial, spanning the full 5,000–25,000 RPM range, grants operators precise control over cutting and finishing operations. Lower speeds are ideal for precision work on aluminum or delicate castings, while full speed unleashes maximum material removal on hardened steel. The electronic speed management system actively compensates for load variations, preventing motor bogging in demanding cuts and maintaining the set speed under consistent pressure. This intelligent control translates directly into smoother surface finishes and longer accessory life.
Ergonomics are central to the design of our cordless die grinder. The slim, anti-vibration grip allows for extended one-handed operation without operator fatigue, while the spindle lock enables tool-free bit changes in under five seconds. The 20V lithium-ion battery platform delivers sufficient energy for over 45 minutes of continuous grinding on a single charge. An LED work light illuminates confined bores and dark recesses, while a transparent spindle guard protects against debris without obstructing the operator's sightline.
Constructed from aerospace-grade aluminum alloy for the motor housing and reinforced polymer for the body, the die grinder withstands the rigors of daily industrial use. The brushless motor extends operational life by eliminating the carbon brush wear that limits conventional tools, reducing total cost of ownership and unplanned maintenance downtime. For industries demanding precision material removal without the tether of air lines or power cords, this cordless die grinder sets the professional standard.
25,000 RPM Brushless Motor
Delivers sustained high-frequency rotation for rapid deburring, porting, and surface finishing on all metals.
Full-Range Variable Speed
5,000–25,000 RPM dial allows precise matching of speed to accessory type and material hardness.
Anti-Vibration Slim Grip
Ergonomically engineered housing minimizes vibration transmission for precise, fatigue-free extended use.
Tool-Free Spindle Lock
One-touch spindle lock enables fast bit changes without wrenches, maximizing uptime on the shop floor.
Technical Specifications
| Voltage | 20V Max |
| No-load Speed | 5,000 – 25,000 RPM |
| Collet Size | 1/4 in (6.35 mm) |
| Motor Type | High-Speed Brushless |
| Vibration Level | < 2.5 m/s² |
| Chuck Type | Keyless Collet |
| Body Material | Aluminum Alloy + Polymer |
| Weight (tool only) | 0.95 kg |
| LED Work Light | Integrated Forward LED |
| Battery System | 20V Li-Ion Slide-Pack |
| Runtime (4.0Ah) | Approx. 45 min continuous |
| Warranty | 1 Year Professional |
Industrial and Commercial Applications
Where Our Die Grinder Excels
- Weld seam removal- Rapidly grinds flush weld beads on structural steel frames and pipe joints.
- Port and bore finishing- Precision surface work on engine cylinder heads and manifolds.
- Mold and die deburring- Achieves fine surface finishes inside precision tooling cavities.
- Aluminum casting cleanup- Removes flash and gates from cast parts at controlled lower speeds.
- Rust and scale removal- Efficient corrosion prep on structural and piping components.
- Carbide burr carving- Ideal platform for detailed metalwork and custom fabrication projects.
Fabrication Shops
The go-to finishing grinder for professional fabricators requiring precision deburring without pneumatic infrastructure.
Automotive Workshops
Ideal for porting cylinder heads and finishing brake components where corded tools restrict access.
Unmatched Technical Advantages
- Brushless Longevity:Eliminates carbon brush wear for a 50% longer motor lifespan versus conventional grinders.
- Electronic Load Control:Actively maintains set speed under varying material resistance for consistent finish quality.
- Precision Speed Dial:Rotary control provides fine-grain RPM selection across the full operating range.
- LED Illumination:Built-in forward light reveals detail in blind bores and poorly lit work areas.
- Slim Profile Body:Compact diameter allows deep access into recessed cavities and confined workpieces.
- Spindle Lock System:Rapid accessory exchange without any external tools reduces changeover time significantly.
- Debris Guard:Transparent collet shield reduces operator exposure to grinding chips and sparks.
- Battery Compatibility:Integrates with a broad 20V platform, sharing packs across tools for cost efficiency.
Global Logistics and Payment
Payment Terms
T/T 30% deposit, L/C, or Net 30 for industrial partners. FOB Ningbo/Shanghai pricing available.
Shipping Options
- Sea Freight:Full container or LCL palletized shipment with foam-in-place protection.
- Air Freight:Available for urgent sample orders; DDP and DAP terms supported.
- Inland Logistics:Rail and road connections to major Chinese export hubs.
- Documentation:Full CO, Bill of Lading, MSDS, and Quality Certification supplied.
Frequently Asked Questions
Q: What collet size does it accept?
A: It uses a standard 1/4-inch (6.35mm) collet, compatible with the vast majority of industrial die grinder bits and carbide burrs.
Q: What is the maximum RPM?
A: The grinder reaches 25,000 RPM at full speed, suitable for high-speed finishing and small-diameter abrasive bits.
Q: How long does a battery charge last?
A: Using a 4.0Ah 20V battery, expect approximately 45 minutes of continuous light-to-medium grinding.
Q: Can it handle carbide burrs?
A: Yes, the high-torque brushless motor is optimized for continuous use with carbide and HSS burr sets.
Q: Is variable speed standard?
A: Yes, a full-range rotary speed dial is integrated, allowing stepless adjustment from 5,000 to 25,000 RPM.
Q: Is there an electronic brake?
A: Yes, an active electronic brake stops the spindle within 2 seconds of trigger release for operator safety.
Q: What is the tool weight?
A: The tool-only weight is 0.95 kg, making it one of the lightest high-power cordless die grinders in its class.
Q: Can I use grinding stones?
A: Yes, mounted grinding stones, flap wheels, and felt bobs are all fully compatible with the 1/4-inch collet.
Q: Does it have overload protection?
A: Yes, the intelligent motor controller provides thermal overload and over-current protection to safeguard the motor and battery.
Q: What is the warranty?
A: All units carry a 1-year professional industrial warranty covering motor, electronics, and body components.
Comprehensive B2B Supply Information
| MOQ | 200 Units |
| Lead Time | 35-45 Days |
| Packaging | Industrial Foam-Lined Carton |
| Certifications | CE, GS, ETL, RoHS |
| Speed Accuracy | ±200 RPM at Set Speed |
| Monthly Capacity | 5,000 Units |
| Testing | No-Load Speed & Vibration Level |
| Custom Options | Collet Size, Color, Logo Engraving |
| Technical Support | Exploded Parts Diagrams & Video |
| Warranty | 1 Year Industrial |
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