Drilling concrete effectively and efficiently requires a sharp concrete drill. The drill bit may become dull with time, making it more difficult to use and possibly causing damage to the concrete. It’s not as hard as you might think to sharpen your drill at home, and it can save you money and time.
We’ll look at a few basic ways to sharpen your concrete drill bit in this guide. You’ll discover how to sharpen and enhance the functionality of your drill bit using basic hand tools and more complex methods. These are simple techniques that you can perform with tools you most likely already own.
Whether you’re a professional or a do-it-yourself enthusiast, knowing how to take care of your tools will help you get the most out of your projects. Now let’s get into the doable actions you can take to maintain your concrete drill.
| Method | Description |
| Grinding Wheel | Use a bench grinder with a diamond wheel to sharpen the drill bit. Hold the bit at a consistent angle and move it back and forth across the wheel for even sharpening. |
| Sharpening Stone | Use a diamond sharpening stone to manually grind the bit. Carefully rub the bit against the stone, maintaining the correct angle to restore the cutting edges. |
| Angle Grinder | An angle grinder with a diamond blade can also be used. Hold the drill bit steady and grind the edges evenly to restore sharpness. |
- Basic sharpening rules
- Methods
- Using conical sharpening
- Using screw sharpening
- Two-plane sharpening
- Features of carbide drills
- How to sharpen a carbide drill with brazing?
- Video on the topic
- How to sharpen a concrete drill with your own hands
- HOW TO SHARPEN A DRILL without experience and practice
- How to sharpen a drill!!! The fastest way!
- How to sharpen a drill for drilling (boring) concrete
- A simple way to sharpen a drill
- How to PROPERLY SHARPEN A DRILL without special skills / Drill sharpening device
Basic sharpening rules
You should become acquainted with the fundamental guidelines for performing this process before sharpening a concrete drill at home:
- Sharpening a concrete drill must be carried out in compliance with the optimal temperature of the body. It is strictly forbidden to overheat it, as this will lead to damage to the product. This rule must be followed if the drill is made of a hard alloy based on titanium.
- If the drill accidentally overheats, it is strictly forbidden to lower it into water. It must cool naturally.
- The work must be carried out gradually. Initially, a small part of the drill is sharpened. After the sharpened section has cooled, we proceed to the next.
- During the work, it is recommended to focus on the equality of angles.
- The cutting edges of the drill must have the same length, since under high loads the tool will be pushed to the side, which is the cause of breakage.
Drills used in hammer drills or drills must be sharpened strictly according to the guidelines in order to guarantee their superior performance.
Methods
Drilling into hard materials should only come into contact with the edges. For this reason, the back surface is sharpened at a specific angle. This action causes a space to open up between the hole’s bottom and edge.
Using conical sharpening
The sharpening machine rotates around its axis when the drill is placed into a unique prism. A specific angle is maintained between the prism and the grinding wheel. The drill’s back has a cone-like shape to it. It is situated at the point where the grinding wheel’s working surface and swing axis meet.
You have to first modify the parameters in order to properly sharpen the drill. The angle between the axis of the sharpening cone and the drill itself must be 45 degrees. Two approaches can be used to conical sharpening:
- The apex of the cone that will be sharpened must be located below the apex of the sharpening cone. It is recommended to first adjust in accordance with the specified parameters: a – 45 degrees, b – from 13 to 15 degrees, h – 1.9d. the axis of the drill and the cone must intersect at an angle that is less than the angle of the grinding wheel and the drill. If we sharpen using this method, then we must ensure that the apex of the drill is located above the apex of the sharpening cone. The tip and the drill should be at a distance of 1.06 d. the drill axis and the cone axis should intersect at an angle of 90 degrees.
- In order to provide a clearance angle for the peripheral point, it is necessary to provide the following indicators – a-5-7 degrees, angle 2ф – from 116 to 118 degrees. the cutting transverse edge should be at an angle of 55 degrees.
It is advised to employ the conical method to increase the drill’s clearance angle more sharply. If the drill has a large diameter—more than three millimeters—this method can be applied.
Using screw sharpening
Using the screw method is advised if the process of sharpening drills needs to be automated. It consists of the translational movements synchronizing with the grinding wheel’s rotation. It can be used to sharpen the front and rear angles at the same time.
The working part’s rear angles get larger as it gets closer to the center when the screw is sharpened. The drills break when drilling extremely hard materials because the transverse edge of the drills becomes weaker when using this method.
Two-plane sharpening
Drills meant to be used on soft materials should be sharpened using this method. This method of sharpening is advised if the drill’s diameter is less than 3. Drills are sharpened at a 60-degree angle using this technique. This approach improves the products without correcting errors.
A concrete drill’s lifespan can be greatly increased and its efficiency maintained with a simple, at-home sharpening procedure. You can sharpen the drill bit manually with a diamond file or with an electric sharpener to restore its cutting edge and enhance its functionality. With a well-maintained drill, these easy methods not only reduce replacement costs but also guarantee that your projects run smoothly.
Features of carbide drills
Products made from high-strength metals, such as cobalt and tungsten, are combined with carbon. These tools are used for drilling through stone, brick, and other materials with a high degree of hardness. Copper soldering is used to secure the carbide plate to the steel tail. The drill’s diameter is expressed in sections that are cylindrical.
The drill is resistant to abrasion and features a conical surface. The item can withstand high temperatures. However, because of its fragility, sharpening must be done with caution. Usually, only the back edge of carbide drills is sharpened.
How to sharpen a carbide drill with brazing?
Symmetry is important to consider when sharpening because a lack of it will show wear on the tool. With carbide drills, only the rear edge needs to be sharpened at a 60-degree angle. You must keep an eye on the plane’s uniformity while working. It’s discernible from the glare. The drill appears to be sharpened in multiple planes based on multiple glares. Here, resharpening is done until only one plane emerges.
It is advised to move the drill left and right in relation to the stone and to press the drill down evenly to prevent this.
The carbide drill also needs to be sharpened if solder is covering its front edge. The task is to open the carbide and remove excess metal along the tool’s axis. In this instance, going overboard is not advised as this could weaken the plate fastening to the steel axis. Make sure there is a bridge between the front and back edges when you sharpen.
When equipped with the appropriate methods and equipment, sharpening a concrete drill at home is a doable task. You can preserve the functionality and increase the life of your drill bits by using the techniques described here. Using a grinding wheel, specialized drill bit sharpener, or sharpening stone can all help you maintain the edge and complete your drilling tasks on schedule.
It’s crucial to periodically assess the condition of your drill bits and sharpen them as necessary. Maintaining your tools’ condition not only increases their effectiveness but also guarantees your safety while using them. To prevent mishaps, always remember to abide by safety regulations and take the required safety measures.
Sharpening your concrete drill at home can become a straightforward part of your maintenance routine with a little practice and attention to detail. You can keep your tools ready for the next project and save money by using this do-it-yourself method.
