How to Cool Drill Bit? – Best 07 Tips!

You can cool the drill bit by immersing water, using cutting oils, using the dust suction equipment, and more than that, you can prevent drill bit heating by using proper cutting edge and cutting angle, using low RPM and thrust, and using the proper drilling techniques.

You can use many things to cool the drill bit when you drill. But those methods should be very compatible with the tool and user. So let’s keep reading on until you find a suitable way to cool the drill bit using the below factors. In this list, you can find drill bit cooling methods and how to prevent the drill bit from heating?. So both will be really useful for you.

Tip 01- Immerse In the Water While Drilling

This is a straightforward task. You need to keep the cup of water beside your drilling place and a towel (a piece of cloth).

When you drill, you feel that the drill bit heating is up; immerse in the water and wipe the drill bit with a towel. Do not immerse too much as it touches the chuck. Only the drill bit level. As soon as you immerse the drill bit, you should wipe the water because wet conditions may increase the friction inside and rust.

This is really useful when you use these wood drill bits. You can keep spraying the water to the drill bit. But remember to wipe the drill bit towel. You may think to use any lubricants here. But it will not work here because many lubricants are weak in thermal condensation. Water can be heated up quickly and using this; heat can be removed quickly from the drill bit.

There are many reasons to to overheat the drill bit. This guide will help you to find other reasons for drill bit overheating.

Tip 02- Use Cutting Oil

use fluid to cool drill bits
Use cutting fluid to cool the drill bit

Cutting oil is not the regular lubricant that we use for the engines.

The cutting oils are made by combining petroleum distillates, animal fats, plant oils, water, and air, or other raw ingredients. So these have specific physical and chemical properties. These fluids can hold much more temperature than regular lubricants. As well as there is also lubricant property. Lubricant properties will reduce inner friction.

Most friction is generated during steel drilling. So you had better use cutting oil while you drill steel. Normally you may see there is smoke coming from the drill bit, although you use the cutting oil. This is happened due to more RPM and thrust.

You can use water as a real cutting and dust management liquid when you drill tile and glass. When the dust is mixed with water, it will come out as liquid. And water act as good thermal conduction as well as it is unlimited you can use more.

Read More About – Top 08 Drill Bit Problems and Solutions

Tip 03- Use Chip Suction Method

Drill dust suction

While you drill, swarfs come out. Due to this reason, you must remove them quickly. Else those can be clogged in the drilling hole, and it will generate additional heating. Due to this heating and rotation drill bit can break easily.

If you use a bench drill, you can see most people use the suction equipment near the drill bit. It is a real way to reduce the generated heat from the drill bit.

When the suction equipment is activated, it sucks the air. Due to this reason, the air is moving near the drill bit. This will reduce the temperature of the drill bit. Chips are also moving due to the suction, and there is a dual advantage due to the suction tool.

Tip 04- Use Low RPM and Low Thrust

This is not the heat reduction method. This is a heat-controlling method. Normally we use different RPMs and thrusts for the drill bits and drilling materials. If you are not able to maintain the correct values, you can observe heating is increased rapidly.

When the RPM and thrust are high, it can move on the material in a tough way. Due to this, heat is generated abnormally. These are two factors, and both are affected in the same way.

Drilling wood and soft material require high RPM, and drilling steel, stone, and concrete require low RPM. Thrust is also important.

When you drill with high speed and low thrust, you can see broken chips coming out. If you use high RPM with the high thrust, you can see more heated and varied thickness chips coming out.

If you use moderate RPM and thrust, you can see the well shape and thick swarfs are coming out, and it is about 2″ in length when you drill metal. So use moderate RPM and thrust for the drilling process in order to heat protection.

Tip 05- Use Drilling Techniques

Drilling techniques are really important. If you are a newbie, you may try to drill with constant pressure until the hole is drilled. But this is not a proper way. This can heat much the drill bit. You should drill into the material step by step. Push and release the drill bit. And let the chips come out. When you release the drill bit can be cool a bit, and the continuous temperature will not be increased rapidly.

Normally follow 2-3 steps to drill one hole. If you can, take out the drill and immerse yourself in the water during this process. This seems a bit difficult. But it is easy when you get used to this.

Tip 06- Clean Swarfs

When we drill, chips come out. Continuous chips can be introduced as swarfs. Normally swarfs are the result of perfect drilling speed and RPM. But these can be clogged due to the flutes blocking. When the swarfs come out, there should be a space above the drill. It is about 2 times the diameter length of flutes.

Sometimes, you cant observe clean swarfs due to blunt drill bits. So you can sharpen your drill bit using these methods.

When you drill continuously, these swarfs can be clogged inside due to fewer lubricants. So drill bit can be heated more and more. So you had better keep the free flute length above the drill bit and then use the recommended cutting oils for the lubricants on the flutes.

Tip 07- Use Proper Cutting Angles

This is not about the cool drill bit tips. But this can prevent the drill bit by heating. Proper cutting angle and the cutting edge will help to drill the material easily. If the cutting edge is damaged or has no proper cutting angle, you can see it will slipper on the material. Due to this, tools and materials will be heated too much.

As a result of this, it will be heated more and more. To prevent this, you must use proper cutting angles 118° for soft material and 135 ° for hard material or recommended values according to the material.

Tom Mackency

Tom Mackency

Hi, I am Tom Mackency. It has been 10 years that I have been working as a professional woodworker since 2013. I am really enjoying my carrier by creating many kinds of projects in my workshop. But mostly I like for home improvement projects. Home improvement and DIY projects are the most interesting things for me. More than that, the coolest things are power tools. Those are very precious and efficient than a decade ago. So I try to introduce so many things about power tools, woodworking, DIY projects, home improvement and many more interesting topics here.