66 RECOMMENDED APPLICATIONS Accurately machined holes are vital when processing con- struction elements or producing high-quality wood parts. Where visible, they underline the looks of furniture and in the non-visible area holes are paramount for the accuracy of the design. For this reason, special, precisely machined wood drill bits must be used to process wood. Wood drill bits are equipped with a distinctive centring tip. The hole is precisely determined using the centring tip. Lateral shoulder cuts enable clean-cut fibres around the edge of the bore. TECHNICAL DETAILS WOOD DRILL BITS Heller exclusively uses the best steel for its quality wood drill bits. At the same time, accurate processing is crucial, a factor that becomes evident by the sharp cutting properties or the low levels of run out values. Finally, aspects, such as ergonomics and occupational safety are paramount. Avoiding break-out Securely clamp the workpiece onto a base plate (rest) and slightly drill into the base plate when drilling through mate- rials. This prevents cracks on the bottom of the workpiece. Guiding the drill Drilling with a box column drill creates precise holes and a straight progression of the drilling action. Holes produced with a hand-held drill require precise guiding by hand. Removing chips during drilling Pull the tool back through the bore regularly during drilling to TIPS & TRICKS Wood drill bit Lewis auger drill bits remove chips from the drilling channel. In the event of a lack of ventilation, and hence the removal of chips, the drilling channel clogs up, the drill bit jams in the hole and causes the material to heat up. Material suitability The sharpness of drill bits can be maintained over a pro- longed period of time if the drill bits are handled with care. For this purpose, it is important to exclusively use tools in solid wood or wood materials. Metal or masonry will make the drill bit blunt or cause it to fracture. We orientate our actions on the professional user's require- ments. After all, all Heller products contribute to faster and more economical working for professionals. HELLER QUALITY FOR PERMANENTLY OUTSTANDING RESULTS