Types of CNC Inserts Explained
Simple guide for everyday machine users in India
In every machine shop, tools matter. One tool that’s used all the time is the CNC insert. These are small parts, but they do big work. From cutting metal to shaping parts, these inserts help the CNC machine do its job right.
If you are new to this, or even if you’ve been working with machines for years, this simple guide will help you understand more about CNC inserts, drilling insert, and U drill inserts, in easy words anyone can understand.
What Are CNC Inserts?
Let’s start with the basics.
CNC inserts are small cutting tools. They go into tool holders, and then the holder is fixed into the CNC machine. The insert is the part that touches the metal and does the cutting.
Most inserts are made of carbide. That means they’re super strong and can handle tough materials like steel, cast iron, or aluminum. When they get dull, you don’t throw away the whole tool, you just change the insert.
That’s why people like CNC inserts. They’re easy to replace and save both time and money.
Why Inserts Matter
If you use the wrong insert, your job will be slow or wrong. The part might not come out clean. The tool might break. The machine might stop.
But with the right insert, the cut is smooth, the machine runs better, and your work gets done faster.
In every workshop, people use different inserts depending on what they’re cutting and how deep or fast they need to go. Some jobs need drilling insert, others need U drill inserts, and many jobs just need regular CNC inserts for turning or facing.
8 Common Types of CNC Inserts
Here are the main types you’ll see in Indian workshops:
1. Turning Inserts
These are for shaping the outside of a metal part. They work while the part is spinning on the CNC lathe. These can make round bars, rods, and pipes.
You can get them in many shapes, triangle, square, round - depending on what shape you want to make.
2. Grooving Inserts
Used to make small cuts or slots. Grooves are needed in many parts like nuts or rings. These inserts are sharp and narrow.
Some shops use U drill inserts before grooving, to create a center hole or to make the job easier.
3. Parting Inserts
These are used to cut the piece off after turning. Like slicing a bar into pieces. A parting insert works like a sharp blade, cutting the metal into sections.
They are short and strong, and give a clean finish.
4. Boring Inserts
Boring inserts help in enlarging a hole inside a part. First, a drilling insert is used to make a small hole. Then, a boring insert makes it wider and smoother.
This is common in gear parts, auto components, and shafts.
5. Threading Inserts
These are used to make threads on metal. Like the grooves on a bolt or nut. These must be very accurate. One small mistake and the thread won’t fit.
6. Face Milling Inserts
These inserts help make flat surfaces. They remove the top layer of metal and leave a smooth face. Milling inserts can also be used on soft metals like aluminum.
Some shops also use U drill inserts before face milling, to clear the hole area first.
7. Drilling Inserts
This simple drilling insert is used to make holes. They are fitted into special drill holders. The tip does the cutting.
They are used in every workshop, every day. Holes in engine parts, plates, flanges all need strong and sharp drilling inserts.
8. U Drill Inserts
U drill inserts go inside a U-drill, which is a type of tool that makes deep and wide holes fast. These are used when you want to drill quickly and remove a lot of metal.
U drills are popular now in Indian CNC shops. They save time and give a good finish. That’s why more shops are keeping extra U drill inserts ready at all times.
How to Choose the Right Insert?
It’s easy. Just ask these questions:
What material are you cutting?
Do you need a hole or outer shape?
Is the job heavy or light?
What’s your machine speed?
If it’s a deep hole, go for U drill inserts. If it’s just a simple hole, use a drilling insert. For surface or side cutting, pick the correct CNC inserts based on size and shape.
And if you’re not sure, ask someone experienced in your shop, or the tool seller.
Where Can You Buy Them?
In India, inserts are easy to find. You can get them from:
Local tool markets
Online websites like Jaibros
Brand dealers in your area
Many brands like Widia, Mitsubishi, Korloy, and Totem sell CNC inserts, drilling insert, and U drill inserts in all sizes.
Just make sure you check what holder you have before buying. The insert must fit properly.
Care Tips for Inserts
If you want your inserts to last longer:
Don’t use them too fast or too slow
Store them in a dry box
Clean them after every use
Don’t drop them, carbide is strong but can break
Keep extra CNC inserts, drilling insert, and U drill inserts ready
Changing inserts at the right time keeps your machine safe and your work smooth.
Final Words
CNC machines need good tools. And good tools need good inserts.
Whether you’re cutting from the outside, drilling holes, or shaping a part, there’s a special insert for every job.
Now you know the types, CNC inserts for turning, drilling insert for holes, and U drill inserts for big jobs. Just choose the right one, take care of it, and your machine will do great work.
Better insert, better cut, better finish.
