{"id":4032,"date":"2019-10-14T06:42:55","date_gmt":"2019-10-14T06:42:55","guid":{"rendered":"https:\/\/notsealed.com\/?p=4032"},"modified":"2023-07-24T11:38:53","modified_gmt":"2023-07-24T11:38:53","slug":"how-to-sharpen-drill-bits-with-a-dremel-file-or-grinder","status":"publish","type":"post","link":"https:\/\/notsealed.com\/how-to-sharpen-drill-bits-with-a-dremel-file-or-grinder.html","title":{"rendered":"How to Sharpen Drill Bits with a Dremel, File, or Grinder."},"content":{"rendered":"\n
As an electrician and a home handyman, drill bits are a part of my everyday electrical tool kit<\/a>. Most people at one time or another have used some sort of drill bit be it a wood drill, masonry drill or a metal drill bit. The problem arises when these drill bits go dull.<\/p>\n\n\n\n Today I am going to show you how you can sharpen drill bits using everyday items that you can find in your tool shed. As well as the correct procedure to sharpen each drill bit so that they are razor sharp to make your job easy.<\/p>\n\n\n\n Now before we start I just want to say that it is important to use eye protection like safety glasses or mono goggles. As we will be grinding away metal at high speeds it is important to be safe. Make sure you know how to quickly turn off any machinery if something goes wrong. Now let’s get into sharpening your tools.<\/em><\/p>\n\n\n\n I like to sharpen all of my drill bits using a bench grinder. This process can give you a very sharp edge and it is one of the most popular methods around.<\/p>\n\n\n\n Start by looking at the tip of your drill bit, to work out why it won’t cut. There are a few possible reasons such as:<\/p>\n\n\n\n Any of these reasons will cause a drill bit to go slow in the cutting of metal or wood. The point angle and point edge will do all of the cutting.<\/p>\n\n\n Place the drill bit close to the grinding wheel at around a 45 deg angle and start to grind down the cutting angle. It’s important to have the trailing edge of the cutting angle lower than the front. This way you won’t have any high spots.<\/p>\n\n\n\n As you are grinding away, make sure to continually cool your drill bit using a small container of water. Every few seconds dip the tip of the drill bit into the water to cool it down. Excessive heat will decrease the hardness of the drill bit and we don’t want that.<\/p>\n\n\n\n Make sure that point angle is exactly the same on each side of the drill bit otherwise, you will have excessive vibrations when drilling which may cause the bit to jam or break. The hole will also become uneven.<\/p>\n\n\n\n Keep looking at the face or tip of the drill to see how it looks. This is all done by eye and it may take a few goes to get it perfect. Often all that is needed is a new cutting edge which should only take a few seconds of grinding.<\/p>\n\n\n\n For a real test clamp down a piece of metal or wood and use a battery drill to make a hole. Each chip or swarf<\/a> should come out even in the drill flutes. If only one side is cutting you will need some more sharpening of the drill bit. How to sharpen drill bits using a bench grinder<\/h2>\n\n\n
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If the bit doesn\u2019t cut very well, you may have ground down too heavily on the cutting edge, versus on the heel of the bit. Try regrinding at a steeper angle, so that the heel or trailing edge of the cutting tip is formed behind the cutting edge. We don’t want any high spots.<\/p>\n\n\n\n