What to Do When Drill Bit Becomes Dull
MRCM share / 2025-01-09 / Hits(63)
When your drill bit gets dull, you might be tempted to just buy a new one. Stop wasting time regrinding is your best option at home.
Manual grinding drill bit
Manual grinding is dangerous and requires sufficient skills
Tool Preparation: You'll need a bench grinder or a dedicated drill bit grinder. A bench grinder with adjustable speed is preferable as it allows you to control the grinding process more precisely. Make sure the grinding wheels are in good condition and of appropriate grit.
Grinding Technique: Hold the drill bit firmly at the correct angle. The typical included angle for most drill bits is around 118 - 120 degrees. Align the cutting edge parallel to the grinding wheel surface and gently apply pressure while rotating the drill bit to ensure an even grind. Pay attention to maintaining the same angle on both cutting edges to keep the drill bit balanced during drilling. This step demands patience and practice, as improper grinding can further damage the drill bit or render it ineffective.
Using Drill Bit Sharpener With Drill Bit Sharpening Jig
For those who are less experienced in manual grinding or require more precise results, a drill bit sharpening jig can be a game-changer.
How It Works: These jigs are designed to hold the drill bit in the exact position required for optimal sharpening. They come with adjustable settings to accommodate different drill bit sizes and angles. Simply insert the dull drill bit into the jig, set the desired angle, and follow the instructions provided. The jig guides the grinding process, ensuring that each cutting edge is sharpened evenly and to the correct angle.
Benefits: It significantly reduces the learning curve associated with manual grinding. Even beginners can achieve professional-looking results, saving time and frustration. Moreover, it helps prolong the life of the drill bit by ensuring accurate and consistent sharpening.
Professional Sharpening Services
If you're dealing with high-precision drill bits or lack the confidence and equipment to sharpen them yourself, professional sharpening services are available.
Finding a Service Provider: Look for local machine shops or tool sharpening specialists. You can search online, read reviews, and ask for recommendations from fellow DIY enthusiasts or professionals in the machining industry. Ensure that the service provider has a good reputation for quality work and uses advanced sharpening techniques.
Replacing the Drill Bit
In some cases, despite your best efforts, a drill bit may be beyond repair. This could be due to excessive wear, damage to the shank or body, or if it has been sharpened so many times that its diameter has significantly reduced.
Your only option at this point is to buy a new drill.
Tips for Extending the Life of Your Drill Bits
Match Bit to Material: Always use the correct drill bit for the material you are working with. Using the wrong bit can lead to premature dulling.
Proper Speed and Pressure: Operate your drill at the correct speed and apply appropriate pressure according to the material's hardness.
Use Lubrication: When drilling metals, use appropriate lubrication to reduce friction and prevent overheating.
Regular Maintenance: Clean and inspect your bits regularly. Store them properly in a dry place to prevent rust and damage.
Conclusion
When your drill bit becomes dull, you have multiple options at your disposal. Whether you choose to grind it yourself, use a jig, seek professional help, or replace it, the key is to take appropriate action to maintain the efficiency of your drilling operations.
Call to Action
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