Brushless Lithium Battery Angle Grinder

The BOSI Bumblebee series Brushless Lithium Battery Angle Grinder is designed for professional users seeking high efficiency and a comfortable experience. The 5025 brushless motor is the core highlight of this machine—a large-size motor typically found only in higher-priced products, delivering stronger torque and lower heat generation.

Three speed settings cover all scenarios from polishing to cutting, allowing one machine to replace multiple others. Its ultra-light weight of 1.18kg is among the best in its class of 20V products, 15% lighter than the industry average, significantly reducing operator fatigue. The standard configuration of two batteries and one charger allows users to work continuously without purchasing additional batteries.

Bulk purchases include laser marking on the machine body and customized packaging services. Choose the Bumblebee to improve your work efficiency with its lightweight design and powerful performance.

What is a Brushless Lithium Battery Angle Grinder?

The Bumblebee series Brushless Lithium Battery Angle Grinder supplied by BOSI uses a high-quality 5025 brushless motor, offering powerful performance in a compact and durable design. It has a 4500mAh (4.5Ah) battery and a 20V voltage platform.

The no-load speed is adjustable in three settings: low speed 3600r/min (polishing, deburring), medium speed 6700r/min (grinding), and high speed 8800r/min (cutting). The grinding wheel has a diameter of 100mm, a spindle thread of M10, and a grinding wheel bore diameter of 16mm. Weighing only 1.18kg, its compact design makes it more comfortable to hold.

It features one-button battery level monitoring, a wear-resistant and drop-resistant casing, and is safe and reliable. It comes standard with two batteries and one charger, meeting all-day work needs. Suitable for metal grinding and cutting, stone cutting, weld cleaning, rust removal, and polishing.

Product Parameters

Product Advantages

5025 Brushless Motor: Adopts a large-size brushless motor (5025 specification), with torque approximately 20% higher than ordinary brushless angle grinders, ensuring smooth cutting of thick plates without jamming.

Three-speed mechanical adjustment: lever-type speed control with clear speed settings. Low speed (3600 rpm) is suitable for fine polishing, medium speed (6700 rpm) is suitable for daily grinding, and high speed (8800 rpm) is suitable for rapid cutting. Different speeds are matched to different materials, protecting the workpiece while improving efficiency.

The slim, ultra-lightweight body features a narrow handle that fits comfortably in the palm of your hand. The bare unit weighs only 1.18kg, and about 1.6kg with the battery. It is easy to hold for extended periods without fatigue, making it especially suitable for high-altitude work or for female operators.

One click battery level display: The LED light on the side of the battery displays the remaining battery level (three or four lights) when pressed, avoiding power outages during work.

Wear-resistant and Drop-resistant Housing: Made of fiber-reinforced nylon, resistant to drop impacts. Internal motor and circuit board have shock-absorbing pads. The entire machine has passed a 1.5-meter drop test.

Spindle Lock + Dust Cover: Single-handed operation for changing grinding wheels. The dust cover is angle-adjustable, effectively blocking flying chips.

Before and After Use