Brushless Lithium-Ion Circular Saw

The BOSI Bumblebee series Brushless Lithium-Ion Circular Saw from China features a 20V/4500mAh battery and a 5030 brushless motor, delivering powerful cutting performance in a compact, lightweight, and durable design. It boasts a no-load speed of 0-5800 rpm, a saw blade diameter of 150mm (24T), a maximum cutting depth of 55mm (at 90°), and an adjustable base plate angle of 0-45°.

Weighing only 1.84kg, it is wirelessly portable. It comes standard with two batteries and one charger. Designed for woodworking and construction formwork, this brushless lithium-ion circular saw combines powerful performance, portability, and environmental friendliness.

Product Parameters

Product Features

5030 Brushless Motor: Adopting a large-sized brushless motor (5030 specification), the torque is increased by about 15% compared to ordinary brushless motors, and the start is smooth. The speed does not drop sharply when cutting hardwood or thick plates. The brushless design has a lifespan of more than three times that of brushed motors.

24T Carbide Saw Blade: Standard configuration includes a 150mm diameter, 24-tooth carbide saw blade, suitable for cross-cutting and longitudinal cutting of timber, plywood, and gypsum board. The alternating tooth pattern ensures fast cutting speed and smooth chip removal. The blade thickness is moderate, making it durable and resistant to deformation.

High-precision base plate: The base plate is made of die-cast aluminum alloy with a smooth surface. Its parallelism with the saw blade is factory-calibrated within ±0.2mm to ensure straightness of the cut. The front end of the base plate has a V-groove for precise marking along the guide ruler.

0-45° Beveling Adjustment: Loosen the locking handle on the back of the base plate, and the base plate can tilt to the left. The scale is clear, with each increment in 5° increments, and a stop at 45°. The maximum beveling depth is approximately 35-40mm, suitable for beveled joints such as baseboards and picture frames.

Safety shield: The upper and lower shields are linked, and the shield automatically closes when the saw blade does not touch the workpiece; The protective cover is lifted along with the bottom plate during cutting, effectively preventing sawdust splashing and finger accidental contact. The transparent observation window of the protective cover allows for direct viewing of the saw blade and cutting line.

Spindle lock: When replacing the saw blade, press the spindle lock and use a wrench to easily disassemble and assemble. The spindle lock is interlocked with the switch to avoid accidental startup.

LED Lighting: A built-in LED light at the front of the machine head illuminates the cutting line, allowing for precise alignment even in shadow environments.

Ergonomic handle: The rear handle is coated with rubber, providing anti slip and shock-absorbing properties; The front auxiliary handle can be gripped, making manual operation more stable. The contour of the handle fits snugly against the palm, making it less prone to fatigue after prolonged use.

Why Choose BOSI Tools?

The BOSI Bumblebee series brushless lithium-ion circular saw is designed for carpenters and formwork workers. Its core advantages lie in the powerful performance of the 5030 brushless motor and the long battery life provided by the 4500mAh high-capacity battery.

Weighing only 1.84kg, it is lightweight for a 150mm lithium-ion circular saw, making it easy for women or those working at heights to operate. It comes standard with two batteries and a charger for uninterrupted operation; one battery is charging while the other is cutting.

Bulk purchases include laser marking on the machine body and a dedicated toolbox. Choose Bumblebee for enhanced cutting efficiency with professional power.

Product Testing Items and Data

No-load speed test: Measured speed 5800±200r/min, fluctuation less than 5%, meeting design specifications.

Cutting efficiency test: Cutting depth 50mm on dry pine wood, cutting speed can reach 2-3 meters/minute, with a smooth cut surface and no scorching.

Battery life: A fully charged 4500mAh battery provides approximately 25 minutes of continuous no-load operation; actual intermittent cutting (18mm multi-layer board, 1 meter per cut) can be completed 70-80 times.

Base plate flatness: Base plate flatness ≤0.2mm/m, perpendicularity to the saw blade ≤0.3mm, ensuring square cuts.

Bevel Angle Accuracy: 0° and 45° position error ≤ ±1°, no shaking after locking.

Protective Cover Return: Protective cover opens and closes 1000 times, spring shows no fatigue, smooth return.

Overall machine temperature rise: After continuously cutting 10 boards (10 cuts per board), the motor casing temperature rise ≤45K, and the handle temperature rise ≤20K.

Drop test: The machine body was dropped freely from a height of 1.2m onto a concrete surface without cracking, and the saw blade guard functioned normally.

Noise: ≤85dB(A) under no-load conditions, ≤100dB(A) under load conditions.