Razor Sharp! Sharpen Drill Bit With This Easy Method

Razor Sharp! Sharpen Drill Bit With This Easy Method

Hello friends, Drill bits become dull over time, so they need to be sharpened regularly. Many people want to learn how to sharpen drill bits. That's why we showed you how to sharpen drill bits in this video. If your drills are dull and no longer drill well, be sure to watch this video called how to sharpen drill bits. easy to learn how to sharpen with this method

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[MrAxTheBackBencherExperiment]

If your drills are dull and no longer drill well, be sure to watch this video called how to sharpen drill bits.

[robertqueberg]

Please allow me to ruffle a few feathers, about this subject. I am a retired toolmaker, that has had a LOT of drill sharpening experience. At one stage of my apprenticeship, I spent three months in the tool grinding room. The first order of business, was to resharpen all of the drill bits, that had been dulled on the previous day's two shifts. The most important detail, is to take a close look at the point of a factory ground drill. The bottom of the drilled hole is a cone. As you move along the cutting edges, from the outer corner, inward to the "dead center", the amount of clearance has to increase, and gradually spiral, or wrap around the drill center line to achieve a free cutting drill. To get this geometry with a RH drill, the right hand needs to become a sort of spherical pivot point, that the drill can rotate about. Keep this hand close to the grinding wheel or belt. Once the drill is held with the cutting edge horizontal, at the proper angle, the left hand swings the opposite end of the drill in an arc, which tracks down and out, in a counter clockwise direction.
This may sound complicated and crazy, but it is the way that twist drill point geometry needs to be ground. Buy some cheap new, or used drills of various diameters. Then sit or stand in front of your grinder, and practice until it starts to look "factory". Then try to drill some holes. I have helped a lot of guys improve their grinding. Spending your time grinding drills, will do more for you than trying to build a way around, what is not that difficult, once it is learned. Earlier I mentioned "belt". I worked in a shop during my senior year of highschool, where nearly all of the drill sharpeneing was done by individuals, on a 6" belt sander, which is always flat/straight. I was taught to gage the lip lengths and angles, by holding the drill vertical in front of some plain light source, rotate the drill in your fingers, to align the lips. Your eyes will show you the errors.
Now go grab some drill bits, and practice. Soon, you will wonder why you thought that it was difficult.

[oldschooljack]

To properly sharpen a drill but you need two angles... You need to sharpen the cutting edge, the primary angle... Then you need to relieve the primary angle with a steeper secondary angle. This provides relief and keeps the metal of the bit behind the cutting edge from rubbing on the workpiece.

The thinner the primary angle, the more efficiently the bit will cut... The trade-off is that the thinner the primary is the weaker it is and will wear out faster.

Also of great importance is the rpm of the turning bit and the pressure and speed with which the bit is fed into the work... The larger the diameter of the bit the slower the rpm and heavier the feed... the smaller the bit, the higher the rpm's and the lighter the feed.

[teamboy]

Do not use the side of a wheel to grind it's dangerous.
Just do it by eye, you will soon get the technique.
It's easy

[markseibert]

One of the first things I learned in shop class was to never grind on the side of a wheel. Look at how non true this wheel is running. Grinding wheels are not made to take lateral forces applied to them and may explode, taking flesh with them.

[stevethomas]

The edge may be sharp but it won't cut properly as you didnt grind a relief angle thats why you get all that squeaking the back edge is rubbing

[fk]

I'm ok with first method but second is wrong because side wall of grinding wheel is not supposed to be used for grinding. Sorry bro ...

[brucepigeon]

A simple way to grind your relief, is to color the tip of the drill bit with a colored magic marker. Then starting at the base of the relief grind up to the cutting edge leaving a shadow of the color remaining. Don't over grind the relief as it makes the bit drill want to remove more material than it should. This works it just takes a little practice

Also if you want both flutes to drill the same amount. When you are grinding the drill. Make a single pass then rotate the bit 1/2 turn, By doing this you are removing near the same amount on both flutes, keeping the center of the bit in the center. Never make multiple passes before turning the bit. One pass then 1/2 turn, one pass then 1/2 turn.


Happy grinding

[Calligraphybooster]

A nice method to cut sandpaper or linnen is to fold it with the abrasive side inward and then use another piece to sand the fold. Save you scissors and you always have the tool at hand.

[beef]

Holding that drill bit up against the side of that grinding stone at that angle can be very dangerous. If it catches, it will throw it at you or into your face.I’ve seen it happen.

[jozefbubez]

Guess we all do it but when I was a lad we were told not to use the side of a grindstone. Any advice, please? Thanks!

[alcord]

Drill bits need to be point thinned to cut steel.The central part of the drill needs grinding so the non cutting part is as small as possible.Otherwise drill with a small"pilot drill" and then follow with the bigger drill.

[hoppercar]

Starrett makes a real nice drill point gauge for grinding by hand....but after youve ground so many by hand over the years, you dont even need a gauge anymore

[markchodroff]

Great what do you do with the very small drills, sizes below 1/16 it’s been a problem!

[diatonicdelirium]

Why don't you use some oil when drilling?

[stevesamuelson]

No pilot hole?? No Cutting Oil?? Man, you do it the hard way.

[nathanhale]

Basically the trailing edge (the surface after the cutting edge) needs to be ground deeper than the cutting edge. I just eyeball it

[johnphillips]

Cutting a v in the block will let you sharpen multiple sizes of bits…

[simon]

The leading edge of each side of the drill has to project a bit further than the metal and trailing edge behind. You did that well in the first demo, but not in the second

[sunriseboy]

He's cheating....he is an expert....LOL!

Thank you for an excellent demo. Great visuals. Thank you!