Li-ion Brushless Light Hammer

The BOSI Black Warrior Cool Series Li-ion Brushless Light Hammer is available in 4.0Ah and 6.0Ah battery capacities. It utilizes a brushless motor for powerful impact and improved work efficiency. A safety clutch automatically stops when hitting rebar, protecting the motor and your wrist.

Dual-function design: a drill stop (flat drill) for wood and metal drilling; a hammer drill stop for concrete drilling.

Maximum hole diameter: 22mm for concrete, 13mm for steel, 30mm for wood.

No-load speed: 0-1000rpm (4.0Ah model) or 0-950rpm (6.0Ah model), hammering frequency: 0-4500 blows/min.

SDS quick-change head for holding round shank two-flute, two-groove drill bits. Weighing only 1.87kg, its lightweight design is suitable for high-altitude or long-term work.

Standard package includes two batteries and one charger. Suitable for light concrete drilling and wood and metal drilling, such as home renovations, air conditioner installation, and wiring hole drilling.

Product Specification

Common Parameters: Brushless motor, safety clutch (automatic stop upon hitting rebar), standard configuration includes two batteries and one charger.

Product Details

Safety Clutch Device: When the drill bit encounters rebar or hard foreign objects, the clutch automatically disengages, instantly stopping the impact and rotation, preventing violent reverse rotation that could twist the wrist, and also avoiding drill bit jamming and damage to the motor. This design is a high-end configuration in light hammers, significantly improving safety.

SDS Quick-Change Chuck: Allows for quick bit changes without tools, compatible with standard round shank two-flute drill bits (5-22mm diameter). The chuck's dustproof design reduces dust ingress and extends its lifespan.

Dual-function mode dial: Rotary switch, clearly marked "Drill" (flat drill) and "Hammer Drill". Flat drill mode is used for drilling holes in metal and wood, producing no impact and avoiding damage to the workpiece; hammer drill mode is used for concrete, with a strong impact. The dial has a clear feel and can be operated even while wearing gloves.

1.87kg Ultralight Body: Utilizes a compact brushless motor and engineering plastic housing, with a bare weight of only 1.87kg, approximately 30% lighter than similar lithium-ion hammer drills. Combined with a rubber-coated handle and shock-absorbing structure, it's easy to hold with one hand, suitable for high-altitude operations such as ceiling drilling.

Stepless speed switch: Pressing the depth controls the speed and hammering frequency. A light press starts at low speed, and a hard press is full speed, making it easy to slowly drill holes in tiles to prevent chipping.

LED Work Light: An LED light at the front of the drill head illuminates dark working surfaces, improving drilling accuracy.

Battery Power Display: The battery has a built-in LED power indicator with three bars, allowing you to easily monitor the remaining battery power.

Product Comparison

FAQ

Q: How to reset the safety clutch after it's engaged?

A: After the safety clutch is disengaged, simply stop the drill completely and restart it to automatically reset. If frequently triggered, it indicates that there are steel bars or hard objects at the drilling position, and the position should be adjusted.

Q: What's the difference between a light hammer drill and a standard hammer drill?

A: Lightweight hammers are lighter (1.87kg vs 3-5kg), suitable for small holes with a diameter of less than 22mm, such as for air conditioners, brackets, and wiring; standard hammer drills are heavier and have greater impact force, suitable for larger holes of 28mm or more or for continuous heavy-duty operations. Lightweight hammers are sufficient for home use and renovations.

Q: Can it drill tiles? What precautions should I take?

A: Okay. First, use a flat drill (with impact off) to slowly drill through the tile layer, and then switch to a hammer drill to drill the concrete. Special ceramic tile drills or ordinary round handle drills can also be used, but slow speed is required to prevent edge breakage.

Q: How do I choose between a 4.0Ah and a 6.0Ah battery?

A: 4.0Ah is sufficient for intermittent daily work (such as home renovation); choose 6.0Ah for continuous work (construction site, installation team) to reduce charging frequency. The weight of the two is almost the same.

Q: What if the drill bit won't come out of the chuck?

A: The SDS chuck is designed for pulling. If it gets stuck, gently tap the drill bit tail while pulling the chuck outer sleeve. Do not strike it forcefully.