Published on December 16, 2017
slide 1: BEST HOME IMPROVEMENTS BEST DRILL BITS FOR METAL 12/17/2017 SWEET HOME SPOT Md RIMON slide 2: Sweethomespot.com Page 2 Drills are a must item in any toolbox. Where sharp drill bits are comfortable and fun to use on the other hand working with dull bits is risky and foolish. It can break while you are working and the broken piece can hit your eye. So if you have a flat bit you should sharpen them immediately by following the steps. Need new drill bits Go through this drill bit buying guide. 1. Determine your drill bits Determine your bits if they are sharp or dull headed. You can check it by comparing the bit with a new sharp bit. It is important to determine the edge because broken and sharp bits are treated differently. slide 3: Sweethomespot.com Page 3 2.Pick a Sharpening Tool An excellent sharpening tool is crucial to get a crisp and shiny sharpness. A drill doctor is expensive but a very useful tool to sharpen the bits. If you can do it by your hand you won’t need extra tools. Note: If you think of doing it with your hand wear a thick pair of gloves to protect yourself. 3. Perfect the angle Be careful with the angle. Holding the bit at a perfect 59-degree angle is important. Don’t forget to tighten the thumb nut. Otherwise you won’t find your desired sharpness. slide 4: Sweethomespot.com Page 4 To sharpen them with your hand hold the bit carefully with the shank which is angled off into the left side approximately 59 degrees. While the bit contact to the grinding wheel move the bit with shank further left downward while rotating and twisting the bit clockwise. Note: You don’t need to use any tool to determine the angle. The clamps have 59 degrees angle labeled on them. 4. The Edge There is a small tip of the tool where the drill bit’s flutes can rest against it. The tip is adjustable so that you can fit the flutes edges against it by raising and lowering the tip. 5. Adjust the overhang Try to keep the height of the bit coming out from the tool similar to the radius of the drill bit’s horizontal circular area. 6. Angle and width of the edge After adjusting the overhang you should check the Chisel Edge of the bits. It cannot be too wide or too narrow. If it is wider than it should be the drill bit’s tip will become flat. Flat bits are difficult to make a hole on any surface. If the overhang is too narrow you will find difficulty sharpening the bits. slide 5: Sweethomespot.com Page 5 Note: If the tip is flat somehow you should spend extra time for them in the grinding wheel. 7. Standard Cutting Edge Angle An Ideal edge should be the possible shortest but appropriate to pierce a hole. Not more or less. It should be enough to run between the lowest points on the valleys of the fluting. 8. Clamp the drill bit into the tool Once you set the overhang clamp the bit into the tool. Make sure it is tight enough so that it won’t fall from it. Note: If the nuts are loose tight them with a plus. 9. Set the tool as long as you want the length of the bit Adjust the sharpening guide according to your desired length for the bit. Loosen the nut which is colored metal or steel and then adjust the black colored nut. It will keep the end tail and end of the bit movable. slide 6: Sweethomespot.com Page 6 10. Align the bit’s height Adjust the bit’s height and align it against the grinding wheel. The drill bit’s tip should remain even with the motor shaft’s center. Perfect alignment is crucial for excellent sharpness. 11. Attach the tool to the table Set up the tool firmly on the table. It shouldn’t move while the bit is being sharpened. But remember that the bit would not stay too close to the grinding wheel otherwise it will be hard to sharpen because it gets scorching if stays too close to the wheel. Being too hot you may lose additional material from the bit. Just make the bit touch the grinding tool. Note: Don’t use glue. Even Superglue won’t work to keep the tool still in the table. 12. Start grinding Initiate the motor once everything is set. Move the rear of your sharpening guide from left to right. Note: Never underestimate the safety precautions. Grinding wheel is very dangerous to work with so If you are doing it with your hand look where your fingers are moving around the wheel. 13. Rotate the drill bit one-half turn Keep swinging the bit through the guide till the tip is beyond the grinding wheel. Do a one-half turn repeat until the half of the bit is sharpened. Once the half of the tip sharpened correctly you can start the other half. But don’t forget to turn off the wheel before you start the other half. The flutes should rest on the tip of the guide. slide 7: Sweethomespot.com Page 7 Turn off the motor and remove the bit. Check if the Chisel Edge is narrow enough. If it is not continue the process until you get your desired edge. Adjust the overhang again if you need. 14. Make sure the finishing of the Bit This is how the cutting edge should look like. There should not be any worn left. Make sure the rounded chisel edges are gone. You can check it by casting glints of light in the cutting edges. Edges should be crisp and sharp. The article covers all those things that you should consider while sharpening the drill bits. Following those will make it easy to get the job done. So proceed accordingly and if you still find any issue regarding this you can check the following video for a better understanding. slide 8: Sweethomespot.com Page 8 Not all bits are the same. Each project has different needs. That’s why there are so many shapes and designs of drill bits. Different project requires particular shaped drill bit. That’s why it is mandatory to know the difference and why they are suitable for specific surface or material. If you choose a wrong drill bit it may lead to structural flaws or broken bits. Selecting a bit made of right material would help to ensure the hole has a smooth edge. The success of a project mostly depends on the selection of tools. You have to make sure the bit you use should be suitable for the material you are making the hole in. The best way to know what drill bit is perfect for the project is to understand of all available types and to make a decision based on the understanding. To know more about drill bits before buying bits check the Best Drill Bits Review. When buying a drill bit consider where and how the bit would be used. Decide which material is best for this task and then choose a type tip and a size. It’s often a smart choice to buy multiple sizes in various tips to complete the project. You can save money by buying awhile set of drill bits in various sizes. Remember it is crucial to select bit materials and styles that are perfect for the project because failure in doing so may cause damage to the drill the drill bit or the project at hand. That’s why the selection should be based on several factors like material coating and shapes. If you know what kind of material shape or layer are for which type of drilling it won’t be difficult to choose one. Use based on Materials: Several types of metal are used to make drill bits. Each material is suitable for different surfaces. Before choosing it’s important to know the strengths and flaws of that material. Low Carbon Steel – for softwoods: For drilling a hole in the comparatively softer surface like woods Low carbon steel is very useful. But they cannot drill through metals or hardwoods because these drill bits are too soft for them. Despite its flaws they are very economical. slide 9: Sweethomespot.com Page 9 High Carbon Steel – for hardwood and metal:They can tolerate very high temperature more than low carbon steel. That’s why they do not require frequent sharpening. High Carbon Steel is suitable for drilling holes in hardwood or thin metal surfaces. They are as much economical as low carbon steel. Carbide – for Hardwood and Thin Steel: Carbide tips are specialized to operate on hardwood and thin steel. These tips can dissipate heat very rapidly that’s why they can hold the edge longer. But they need to be handled very carefully because they are very brittle. Cobalt – for Thick Metal: They are very hard and they can bore into hard materials like stainless steel or any thicker metal. Due to less susceptibility to heat damage they are extremely brittle prone to accidental damage. Diamond Drill Bits – for hard yet fragile and delicate substance: PCD or commonly known as Poly crystalline diamond bits are the hardest in the market. They can grind through ceramic tile granite fiberglass marble glass stone and heavy metals. They have different shapes and functions. Sometimes they are useful to enlarge the per made hole in any surface. slide 10: Sweethomespot.com Page 10 Use based on Coating: Drill bit coatings make the drill more lubricated harder sharper or even more heat resistant than the usual metal bits. Coating significantly improves the cutting quality lifespan and durability of drill bits. Black Oxide – for Steel Iron: Black oxide provides corrosion protection. It increases tempering relieves stress reduces chip welding and galling aids in retaining lubricants and they are very economical. Black Oxide coated bits can cut through Iron Steel etc. Bronze Oxide – for Cobalt Steel: Bronze oxide coated drill bit is effective to drill through cobalt steel. This coating also increases tempering helps to reduce stress. The bronze oxide coating is often used with black oxide. Titanium Nitride TiN – for Magnesium Aluminum Steel Iron: It is comparatively expensive but very effective. Besides increasing hardness it also provides production increasing thermal barrier and longer lifetime. This coating is used to drill through Iron Steel Aluminum Magnesium etc. TiN also gives you all other facilities that black and bronze oxide can provide. Zirconium Nitride – for Metal: They are popular for decreased friction strengthening brittle drill heat resistance. It is very useful for drill bits that are used for precision drilling. It is very effective for reducing the risk of accidental damages on the brittle bit types which is caused by rough handling. slide 11: Sweethomespot.com Page 11 Special Bits for Special Use Tungsten Carbide – for small space drilling and drilling through abrasive materials. Diamond Core – for stone cutting and masonry. Masonry Bit – for cutting through brick concrete and mortar. PCB drill Bit – for boring holes in the electronic computer boards of most electronic objects and fiberglass boards. Flexible Shaft Bit – for creating uniquely shaped holes in construction work. slide 12: Sweethomespot.com Page 12 We often use a single drill bit on different surfaces. But it is not appropriate for your drill machine and bit or the project. Before using a drill bit make sure if it can go through the surface with that speed and pressure. That’s why it is very crucial to pick the right one. If you have gone through the whole article you already know which drill is appropriate for which material. If you still have any question regarding drill bits feel free to leave a comment.