What Is a Silver & Deming Drill Bit Set Used For?
By Drill Hog® | Published: 2026-10-24
Category: How-to Guides
Learn the practical uses of Silver & Deming drill bits, including large-diameter drilling in metal and wood, and how their reduced shank design works with standard chucks.
Quick answer
Silver & Deming drill bits are used for drilling large-diameter holes—typically from 1/2 inch up to 1-1/2 inches—in metal, wood, and plastic, using a standard drill with a 1/2-inch chuck.
Why the reduced shank matters
Silver & Deming bits have a 1/2-inch reduced shank that fits into any drill with a 1/2-inch chuck, even though the cutting diameter is much larger. This lets you drill holes up to 1-1/2 inches without needing a large, expensive drill press or a special chuck. The tri-flat shank design also prevents slipping in the chuck, giving you more control during heavy drilling.
Common applications
These bits are ideal for structural steel work, plumbing and electrical conduit runs, and woodworking projects that require large clearance holes. They also work well for enlarging existing holes in metal plates or machinery. Because of their size and the torque required, they are best used in a drill press or a powerful hand drill with a side handle.
Limitations to consider
Silver & Deming bits are not designed for high-speed drilling in hardened steel or for use in hammer drills. The reduced shank can also create a weak point if excessive side pressure is applied, so always drill straight and use cutting oil for metal. For very deep holes, you may need to clear chips frequently to avoid binding.
Frequently asked questions
- Can I use Silver & Deming bits in a hand drill?
- Yes, as long as the hand drill has a 1/2-inch chuck and enough torque. Use a side handle and low speed (300-500 RPM) for best control.
- What sizes do Silver & Deming bits come in?
- They typically range from 1/2 inch to 1-1/2 inches in fractional increments, such as 1-1/16", 1-1/8", 1-3/16", and so on. Some sets also include metric sizes.
- Do I need a pilot hole?
- For larger bits, drilling a smaller pilot hole (e.g., 1/4 inch or 3/8 inch) first reduces torque and helps the bit cut more smoothly. The split point on many bits reduces the need for a pilot, but it's still recommended for sizes above 1 inch. Always use cutting oil for metal drilling to extend bit life.
- What materials can they drill?
- Mild steel, stainless steel (with slow speed and oil), aluminum, wood, and plastics. Avoid hardened steel or masonry.
Product facts
- Drill Hog® 8 Pc Super Jumbo HI-Molybdenum M7 Silver & Deming Drill Set: Made from HI-Molybdenum M7 steel with a 135-degree split point that prevents walking. The split point allows you to start the hole accurately without a center punch, and the M7 steel provides good wear resistance for drilling in steel and stainless steel.
Drill Hog® 8 Pc Super Jumbo HI-Molybdenum M7 Silver & Deming Drill Set
