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Drill bits are a tool that we used to create holes in our materials. Typically, drill bits come in many shapes and sizes, and they can create different kinds of holes in our materials. Hello Everyone! I'm Frank J. Guidry, and today we're going to talk about drill bits.
So, If you want to learn more about drill bits, please read the full content. I hope this content will help you a lot in selecting drill bits for your different kinds of projects.
- Cobalt Steel
- Solid Carbide
- HSS – High-Speed Steel
- Tool Steel / Carbide Tip
You may also like to read the drill bits reviews .
Many factors categorize drill bits. Like its coating, constructional material, length, cutting edge, Tip Style, Flute style, shank style, Use on different objects.
Table Of Contents
Check the different types of drill bits
Types Based On Coating:
3. Titanium Nitride (TiN): It is comparatively expensive but very effective. Besides increasing hardness, it also provides production increasing thermal barrier and longer lifetime. TiN also gives you all other facilities that black and bronze oxide can provide.
Types Based On Length:
- Jobber length
- Mechanics Length
- Screw machine length
- Extra length
- Aircraft Extension
- Deming and Silver
5. Aircraft Extension: the length is similar to the extra-long drill bit. But, their flute length is shorter. That’s why aircraft extension drill bits are stronger & less susceptible to breaking and bending. They are used for reaching over cutting depth.
Types Based On Drilling Point:
1. Conventional drilling point: These are the most common tips you’ll find. Tip angle is 118 degrees in most cases. They are affordable and economical. Conventional bits are easily re-sharpened that’s why they are so preferable.
2. Split drill point: This advanced version drill bit prevents walking & improves penetration with lesser effort. The angle is between 118-135 degrees. They are comparatively expensive, and re-sharpening is more complicated than convenient drilling point.
3. V Point: This high angle bit is often used in the automated wood boring machine. V point creates thru holes in sheets for dowels and other assembly parts.
4. Brand point: Brand points are used to create blind holes in wood and other thin or soft material to use for shelf pins, dowels, etc. They have spurs on their outer edge which prevents splintering & chipping of the surface.
5. Fishtail points: This tip is like reverse “V.” Fishtails are used to drill on a surface at a particular angle without walking.
6. Taper point: They have a large taper which extends far up to the drill that creates a tapered hole. Taper point works best for old style screws.
General types of drill bits based on structure and function:
The tip has one or more than one flat blades that extend from the center to the edge. Spurs on the outer edge resist splintering or chipping on wooden and laminated surface.
Counter bore can be both with or without flutes. They have a straight shank and same radius as a center drill. Most of the counter bores do not have any special coating.
2. Countersink Drill Bit: Countersink bits usually create a tapered surface hole with a small center hole which penetrates through the material. They intend to use a countersink bit is to allow any tapered head fastener so that it sits flush with the surface.
They have more than one flat blades that extend from the center drill to the edge. The angle is between 60-120 degrees.
Except for the center drill, some countersink doesn't have flutes, and others are patented similar to the twist drill with a removable center drill. They have a straight shank, and the radius is the same as a center drill.
3. Flat bottom Boring Bit: Similar to counter bore, but they don’t include a center drill. These bits are used to make large-diameter thru-hole.
The thru-hole bits are used on locks, wiring holes, doorknobs, etc. They can make flat bottom blind holes which are suitable for European style hinges. Most common type flat bottom boring bits are:
- Forstner bits
- Door hinge bits
- Three wing drills
- Spade bits
- Mortising Bits
Types based on use in material
- Iron: To use - Black Oxide or TiN
- Steel: To use: TiN or Black Oxide
- Aluminium: To use - TiN
- Magnesium: To use: TiN
- Not to use: Black Oxide
- Cobalt Steel: To use: Bronze Oxide
- Wood: To use: Counter bore
- Plastic: To use: Counter bore
The cutting tip has one or more flat blade that extends from the center to edge. They are available in both with or without spurs. More significant bits don’t have flutes.
Most of the significant boring bits have a solid hexagonal shank. Hexagonal Shank prevents the bits from spinning in the chuck while it’s under excessive pressure.