PROJECTS ONLINE: HANDY DRILLING TIPS AND TECHNIQUES
Project Difficulty:
Moderate
The following drilling tips may help your project to proceed more smoothly.
1.
Drilling Basics
After choosing the correct bit for the job, make sure it is secured in the chuck. Be sure corded drills are properly grounded. If using a keyed chuck, key the chuck in every hole. Align the drill with the work, and apply even pressure in the drilling direction (Figs. 1 and 2). Clamp small work pieces securely. Clear chips regularly.
2.
Drilling Safety
Always be sure your drill is in good condition before using it. When drilling into any material, secure your work with a vise or clamps, and be sure to wear eye protection. Drills can kick up a lot of sawdust and may shoot metal shavings and wood chips up into your eyes. Work gloves are also a good idea, especially when you are working with metal, masonry, or glass. Drill bits rotate at high speeds and may easily snag loose-fitting clothing, pulling you in toward a potentially serious injury. Be sure your sleeves are rolled up and that your clothing is thoroughly tucked in. Do not wear jewelry, neckties, or other apparel that may become caught in machinery. If you have long hair, wear a cap to keep hair out of the way when working with rotating tools.
3.
Drilling Masonry
When drilling with masonry bits, use minimal pressure, allowing the drill to do the work. Occasionally, let the bit cool down. For larger holes, start with a small bit, and then change to a larger bit; the work will go faster.
4.
Drilling Metal
When drilling into metal, use oil as a coolant and lubricant. Wear work gloves and safety glasses. Remove the bit, and clear chips and shavings often (Fig. 3). DO NOT use compressed air to clear chips. A string can be drawn back and forth to clear shavings from drill-bit flutes.
5.
Angled Drilling
When drilling a hole that is not perpendicular to the work surface, use a special angle drill attachment or an angled block of wood to guide the bit into the work piece. (Fig. 4)
