题目:What is the Best Drill Bit Material

What is the Best Drill Bit Material

Drill bits are a common type of cutting tool used to

create holes with a circular cross-section from the

objects through removing excess materials, come in

different drill bits sizes for various needs. What are

drill bits made of? In this article, let’s explore the

different types of drill bit materials.

Drill Bit Material Types & Coating - Types of Drill Bits
1. Carbon Steel Drill Bit
– Low carbon steel: this is the cheapest option for

making a drill bit, due to their poor tempers, low carbon

steel drill bits are usually used for drilling softwood

and some plastics, and require to be sharpened often to

extend the lifespan.

– High carbon steel: a better material than low carbon

steel, high carbon steel drill bit can keep their shape

and effectiveness longer, so it can be used to cut

stronger materials, like hardwood and soft metals.

2. High Speed Steel Drill Bit

Compared with carbon steel bits, high-speed steel drill

bit is a more popular choice on the market now. HSS is a

special type of carbon steel, maintaining structural

integrity while bearing high temperature is a marking

advantage of the HSS drill bit, what’s more, high

speed steel bit has higher wear resistance and hardness,

it can also work well at a normal temperature. HSS drill

bits are suitable for most of the wood and metal drilling

process, including CNC drilling. Titanium nitride and

other types of coatings can be applied on the HSS tool to

increase lubricity and reduce friction.

3. Titanium Coated Drill Bit
Titanium is not only a popular aerospace and medical

material, but also a versatile drill bit coating material,

which can make the drill bit last longer. Due to its high

corrosion resistance, good fatigue limit, heat limit,

relatively light weight, and longer service life, titanium

coated drill bit is perfect for repetitive mass production

of drilling into steel, iron, wood, plastic and various

surfaces, it allows a faster RPM and shorter cycle time.

The most common types of titanium coatings are Titanium

Nitride (TiN), Titanium Aluminum Nitride (TiAN) and

Titanium Carbon Nitride (TiCN). TiAN and TiCN are

considered superior to TiN as they can increase the

lifespan to a considerable degree. The drawback of drill

bit coating is that once the tooling becomes blunt, it can

’t be sharpened to avoid the coating material being worn


4. Cobalt Drill Bit
Cobalt is another type of coating for the drill, cobalt

drill bit is used for cutting materials that HSS bit can’

t, such as stainless steel and other difficult materials,

it can retain hardness at much higher temperatures than

HSS and not affected by extremely high heat. But cobalt is

a too brittle coating.

5. Carbide-Tipped Drill Bit
Carbide-Tipped drill bit is very hard, easy to dissipate

heat and can hold an edge longer than other type bits.

Similar to the cobalt drill bit, it’s very brittle as

well and maybe broken up in improper use. Carbide bits are

applicable for drilling fiberglass reinforced plastic and

nonferrous heavy metals.

6. Diamond Drill Bit
Polycrystalline diamond (PCD) is one of the hardest drill

bit material, which can be used on the toughest materials,

such as glass and ceramic. Actually, diamond tool

generally used to grind away material on a micro level, it

can last up 20 times as long as a bare tungsten carbide

tool, but it also cost much higher than any other options.

And diamond bits react negatively when work with ferrous

materials like hot steel.

Drill Bit Material Comparison - What is Best Drill Bit


The material is a major factor for the drill bit

selection, because it also affects the price, properties

and service life. Are you wondering what is the best drill

bit material for metal, wood, titanium, or steel? Here we

’ll compare some materials.

1. Cobalt vs Carbide, which drill bit to choose?
– Price: cobalt drill bits are cheaper than carbide bits.
– Properties: carbide bits can resist more temperature

than cobalt and HSS.

– Cutting speed: carbide > cobalt
– Application: cobalt bit can drill stainless and

hardened steel, carbide bits are widely used for drilling

nonferrous heavy metals, cast iron and abrasive materials.

2. Cobalt vs Titanium, which drill bit is better?
– Composition: titanium bits are made of carbon steel or

high speed steel with TiN, TiAN or TiCN coating, cobalt

bits are HSS bits with cobalt in alloy.

– Application: titanium coated drill bits can make the

tool last longer and reduce temperature when cutting

plastic and wood, the cobalt bits are intended for

stainless steel and hardened alloy steel.

3. HSS vs Cobalt, what’s the difference?
– Price: in general, HSS is cheaper.

– Properties: cobalt bit has higher strength and wear

resistance, however, it’s more brittle than HSS as well.

– Application: high-speed drill bits are suitable for

drilling plastic, wood and mild steel, cobalt, which is

the option for drilling tough materials, it also can do

the work what HSS bit does.

In metal fabrication and manufacturing operations, various

tools use cutting wheels to cut material from a workpiece.

What is a cutting wheel? Cutting wheels, or cut-off

wheels, differ from grinding wheels in their function and

structure. Where grinding wheels use an abrasive to grind

large pieces of material off a workpiece from a shallow

angle, cutting wheels typically make narrow, precise cuts

at 90-degree angles. Consequently, cutting wheels are

often thinner than grinding wheels — though they do not

have the lateral strength required for side grinding,

their minimal thickness makes them better for clean,

accurate cuts.

Weiler Abrasives offers several cutting wheels for

different applications. We provide everything from 1-

millimeter cutting wheels to extended-diameter wheels for

larger cuts. This guide to cutting wheel covers the

differences between various types of cutting wheels and

explains how to choose the right wheel for a given


How to Use a Hole Saw
Cutting a perfect circle in wood doesn't need to be

difficult! There are numerous ways to accomplish this

task, depending on the tools you have in your garage. The

easiest one to use is a circle shaped saw, named simply, a

hole saw.

Ill explain the parts of the hole saw as well as some

techniques for using them. By the end of this article, you

should feel confident wielding this tool on your next


Spade bits are useful for projects where you need a small

hole drilled quickly, like when youre running wiring

through a stud wall. Theyre the cheapest option of the

three, but they have some downsides.

First, the spade bit can be hard to use near the edge

of a board. They also dont make the cleanest hole and tend

to tear out. In general, this type of a bit is best for

rough construction rather than a fine woodworking project.


A hole saw

makes both a hole and a round wooden disc with a thin

serrated blade around a central drill bit.

Hole saws can be attached to a regular cordless drill or a

drill press. There are many types and sizes, which can be

used for cutting wood, concrete, tile, and even metal.

How can this tool help you? Here are some common projects

you might need a hole saw for:

Doorknob and light fixture hardware - Door knobs and light

fixtures require a precise hole for proper placement. Most

other methods for cutting a circle wont work on a door or

ceiling, so a hole saw will be a great help.

Plumbing and ductwork - Hole saws can cut more than just

wood. You can use one when installing ductwork, or to hook

up a rain barrel to your downspout.

Crafts - Dont struggle with lopsided circles made with a

jigsaw! Its much easier create the hole in a cornhole

board, or to make giant Lego dots on the side of a DIY

Lego table with a hole saw instead.

Use a spade bit instead of a hole saw to bore up to 1 ?

holes in wood when you dont need the plug and dont mind

the rough cut edges. Spade bits have two sharp edges with

a point in the center. As the bit spins, the edges shave

out the wood.

Spade bits are useful for projects where you need a small

hole drilled quickly, like when youre running wiring

through a stud wall. Theyre the cheapest option of the

three, but they have some downsides.

First, the spade bit can be hard to use near the edge of a

board. They also dont make the cleanest hole and tend to

tear out. In general, this type of a bit is best for rough

construction rather than a fine woodworking project.

Tips to Choose the Perfect Concrete Hole Saw

Do you own a concrete table top, or foundation that you

have set along the bathroom or room surface at your home?

Need to drill through it to create a vent or for some kind

of fixture? You need the right hole saw that can fit the

shape of your drill and make itself comfortable in your

home. Getting the perfect concrete hole saw

needs a little choosing before buying.

Why Hole Saw
Hole saws are supposed to be slower than a boring bit that

apparently does the same work of drilling into your

concrete. But while boring bits are a bit expensive, hole

saws are available easily at a cheaper rates. The 3 inch

concrete hole saw would work perfectly with the 3/8” home

drill that you use to drill into the concrete. This is

probably why most homes prefer hole saw to drill their

concrete settings.

Know the Hole Saw
When you plan to dig a bigger hole in the concrete to set

up your plumbing stations or probably just want some work

done on your concrete, you should use a hole saw. It is a

steel cylinder which has a saw tooth at the top edge. This

saw tooth cuts into the concrete basing out exactly the

shape that you desire.

Choosing the Hole Saw
It is very important to choose the perfect hole saw to

drill your concrete. You can get a carbon steel hole saw

at a perfectly cheap rate. This is generally used to cut

wood though. Your bimetal hole saw is practically used to

cut both wood and metal. But when you are looking to cut

through concrete, you need to think of buying a diamond or

carborundum grit 3 inch hole saw. This will cut through

the concrete perfectly.

Using the Hole Saw
When you are working on concrete with concrete hole saw,

here’s how you do it. You should draw a huge circle

around the area you are looking to drill. Now begin

drilling with your hammer drill; you need to punch holes

in here. Once you are done with that, you can clean the

whole setup with a side grinder or a diamond blade. You

can use the spline shafted with the hole saw to do the

whole drilling for you. Make sure you use a 2 and half

inch spline for the drilling purpose. This will blend in


Breaking In Your Diamond Saw Blade
One key to ensuring a long life and ease of use for

diamond saw blade is knowing how to properly

prepare them for use.

First, make several cuts through a soft abrasive material,

such as a common red brick.

To start a saw cut on lapidary material, run the saw blade

at operating speed and slowly feed your stone into the

spinning blade. Watch the initial cut to ensure a straight

feed. If the cut isn’t straight, the blade will deflect

at the point of contact, producing an uneven cut.

As soon as you notice the blade deflecting, stop the saw,

shift the stone slightly and start the process again. If

you don’t correct the process immediately and continue to

cut, the blade will be dished by the time you finish the

cut. If this happens, the blade will require repair or


As a professional

, we offers a variety of lapidary

equipment and supplies for jewelers and stone cutters.