The Makita 8406 Diamond Core Hammer Drill is a versatile power tool designed for drilling concrete, masonry, wood, metal, and other materials using diamond core or tungsten‑carbide bits.
The manual covers important safety rules, side‑grip installation, selection of rotation‑only or rotation‑with‑hammering modes, operation of the clutch‑type torque limiter, and maintenance procedures to keep the tool safe and reliable.
| Maximum diamond core drill diameter | 152 mm (6") |
|---|---|
| Maximum tungsten‑carbide drill diameter | 30 mm (1‑1/8") |
| No‑load speed range | 0 – 22,500 RPM |
| Torque limiter type | Clutch‑type torque limiter |
The clutch‑type torque limiter slips when a preset torque is reached, disengaging the motor from the output shaft to protect the tool and bit.
Ensure the tool is off and unplugged, place the bit in the chuck as far as it will go, tighten the chuck by hand, then use the chuck key in the three holes and tighten clockwise evenly.