- Extent of Boring Diameter:1-3/16(30mm) 4-3/4-(120 mm)
- Extent of Boring Thickness:1/8''(3mm)-2" (50mm)
Materials that can be bored:
- Veneer Plywood Wood board, Plaster-board.
- Thinasbest-slate,etc.
- Use the twist drill for boring thick wood, and the chisel end drill for thin wood.
How to use Free-Doughnut"
1.Set both cutting-blades on blade-holders tightly and correctly as shown in Figures A, B and C are correct.
2. To adjust the size locate the inner edges of the blade holders against the size graduation. For example number " 40 " for a 1 (40mm) dia. Hole.
3.Set two blade holders at the desired graduation on the measure - bar by tightly screw - in the hex nuts using an L-shape hex wrench.
4.Use the chisel end drill when boring thin wood while use the twist-drill when wood is thick.
5. Before boring. Hold two sides of veneer or timber firmly by stepping on it. Then stare boring after cautiously setting the twist-drill or chisel end drill at the centre of the desired hole. When using power-drill, be sure to contact the cutting blades gradually and slowly on the object to be bored. Abrupt contact of the blades on the boring object can give shock to your hands.
6. When deep boring-1" (25mm) up to a maximum 2" (50mm)-is desired, use the Free-Doughnut from one side of the timber, and then start boring again from the other side until the cutting blades bore through a hole making the doughnut-shaped disc.As shown in figure
7. By way of using optional measure-bar.large hole with a maximum diameter of 8 " (200mm) can be bored.
What's in the box
1 x Bebona Adjustable Hole Saw Circle Cutter Drill Bit
