Fractional-inch drill bit sizes For Morse taper-shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch increments up to 3 inches, 1/8 inch increments up to 3¼ inches, and a single 1/4 inch increment to 3½ inches.
- Use a bit 1/64” smaller than the target hole size for softwoods.
- Use a bit exactly the same size as the hole when working on other materials.
- If you're not sure which to select, choose a drill bit 1/64” larger than the hole you wish to create.
Where do bits go in a drill?
In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck.
How do I choose the right size drill bit for a wall plug?
For a concrete wall and a plastic plug, choose a bit that is slightly smaller than the plug. This should allow to be driven in with a light tap of a hammer and is called an interference fit. If it is a concrete wall and a steel anchor, then you have to drill the wall almost exactly.
What are the three main types of drill bits?
Drill bits are generally classified as Twist Drill, Counterbore, Countersink, Flat Bottom Boring, and Specialty. On our web site we have divided these into two categories: Drill Bits - Normally used with hand held drills or drill presses fitted with standard chucks.
What are the different sizes of drill bits?
- 1/16″
- 5/64″
- 3/32″
- 7/64″
- 1/8″
- 9/64″
How are sizes determined for a drill bit?
Typical drill bits have markings somewhere on the shank above the threads. It's small, but it usually has the drill-bit diameter stamped into the metal; the number is written in fractions. For example, the markings may read: 1/4-inch, 3/6-inch or 25/32.