Li-ion Brushless Hammer

BOSI's Black Warrior Cool Series Li-ion Brushless Hammer uses a brushless motor, providing superior power and 30% longer battery life than brushed hammers. Battery capacity is 20V/4.0Ah, maximum drilling capacity 28mm (concrete), optimal drilling range 8-20mm. No-load speed 0-1050r/min, hammering frequency 0-4800 times/min.

Wireless and portable, freeing you from power cords, suitable for high-frequency, multi-scenario professional construction. Weighing only 3.44kg, the machine is well-balanced and easy to operate. It comes standard with two batteries and a charger, sufficient for all-day work.

Suitable for drilling holes in concrete walls, air conditioner installation, plumbing and electrical wiring, bracket fixing, etc.

Product Parameters

Product Application

Air Conditioner Installation: Drill Φ10-16mm holes in the concrete exterior wall and install expansion bolts to fix the air conditioner bracket. Wireless design avoids high-altitude cable pulling, increasing efficiency by 50%.

Electrical and Plumbing Wiring: Drill Φ20mm holes in brick walls or concrete beams and run electrical or water pipes through them. The 28mm large diameter hole can easily pass through 4-point or 6-point pipes.

Surveillance Camera Installation: Drill Φ8-12mm holes in concrete columns or brick walls and fix the camera bracket. Portable lithium battery, no need to run cables from the distribution box.

Guardrail/Stair Handrail Installation: Drill Φ14-16mm holes in steps or walls and insert expansion bolts to fix the columns.

Home Ceiling Installation: Drill Φ8-10mm holes in the concrete ceiling and install expansion tubes to hang the joists. Lightweight body (3.44kg) suitable for high-altitude operations.

Booth Construction: Drill Φ20-28mm holes in cement floors or brick walls to temporarily fix display stands and partitions. Lithium-ion cordless batteries facilitate on-site relocation.

Road/Bridge Maintenance: Drill Φ16-20mm holes in concrete curbs or bridge piers to install temporary guardrails or monitoring equipment.

Why Choose Us?

The BOSI Black Warrior Cool Series brushless lithium-ion hammer drill is designed for professional construction workers. Its maximum drilling capacity of 28mm is among the best in its class of 20V lithium-ion hammer drills, meeting the needs of most decoration and installation work.

The brushless motor, combined with a 4.0Ah battery, allows for approximately 50-60 consecutive holes under standard conditions (drilling 16mm concrete holes), more than 20 more than brushed models. The 3.44kg weight is ergonomically optimized, with a rubber-coated handle for shock absorption, reducing wrist strain during extended use.

Choose the Black Warrior lithium-ion hammer drill for wireless freedom and improved construction efficiency.

Product Testing Items and Data

Drilling efficiency test: Using a 16mm drill bit to drill C30 concrete, single hole depth 80mm, average time 12 seconds, a single battery can drill 55 holes continuously.

Hammering force test: Single hammering energy is about 2.0J, sufficient to quickly break medium hard concrete.

Battery life: With a fully charged 4.0Ah battery, continuous hammer drilling mode lasts approximately 25-30 minutes (intermittent operation can reach 2-3 hours).

Vibration acceleration: Vibration acceleration at the handle ≤12m/s², better than the industry standard (15m/s²), reducing arm fatigue.

Noise test: No-load noise ≤ 85dB(A), load ≤ 100dB(A).

Temperature rise test: After drilling 10 holes continuously, the motor housing temperature rise ≤50K, and the battery temperature rise ≤35K.

Chuck locking force: After the drill bit is inserted, the pulling force ≥500N does not dislodge.