Porasarja KWB 513900 5 kpl kovalle ja pehmeälle puulle

Drill bit set KWB 513900 contains five wood drill bits made of chrome vanadium (CrV) steel with a 1/4" hexagon shank to ISO 1173 (E 6.3). Each bit has a centre point and two cutting wings with accurately formed, ground spirals and a chemical black finish to provide precise, break-out free holes in softwoods and hardwoods. The bits are compatible with all cordless drivers, drills and bit holders that accept a 1/4" hexagon drive to ISO 1173.

Advantages

The CrV steel construction offers good strength and wear resistance, while the centre point and two cutting wings ensure clean entry and exit without splintering. The 1/4" hex shank provides secure fitment in chucks and quick-change holders. Ground spirals improve chip evacuation and drilling speed. The chemical black finish adds corrosion protection and reduces friction.

Suitable for

Key specifications

How to use

Secure the appropriate bit in a compatible 1/4" hex chuck or holder. Position the centre point on the marked drilling location and apply steady pressure while running the drill at a suitable speed for the wood species. Allow the drill to cut without forcing; the cutting wings will produce a clean, break-out free hole. Withdraw the bit periodically to clear chips if drilling deep holes.

Recommendations

Use appropriate drilling speeds and clamp workpieces securely. For best results in hardwoods, start with a pilot hole if necessary and clear chips frequently. Store bits dry to prevent corrosion despite the chemical black finish.