How to Sharpen Twist Drills - Small, Medium and Large. A Skill Everyone With a Shop Needs!
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- Опубліковано 27 лип 2024
- Anyone who has any kind of shop probably has Twist Drills and many of them are likely dull. This will teach you how to sharpen them at home and save money. The process is a lot easier than many people think. Anyone can sharpen a twist drill and get it back to near new condition.
The process is relatively the same for 118 Degree Drills; 130 Degree Drills; or 135 Degree Drills and does not matter if they are Split Point Drills, you can still sharpen them at home.
Small drills just require an Aluminum Oxide grinding wheel or belt to sharpen. Larger Drills require the same wheel, but to help keep both flutes the same length, I recommend making the height checking jig I share in this video. The height checker is just a 60 Deg Post and a plate mounted on the wall to scratch your drills against to ensure both flutes are sharpened to the same length.
All Lathe work done on a Precision Matthews PM 1440TL Lathe. All Mill work done on a Jet JMD-18 Mill Drill. The mill vise is a Glacern Machine Tools 5" vise and I also use a Glacern Machine Tools 3" Face Mill.
Thanks for watching! - Навчання та стиль
Todd job of simplifying the process.
After breakfast, a dozen dull/damaged drill bits, me and my Kalamazoo 2x48
Cheers
Hope you were able to get them all sharp and back in tip top shape.
Great instructional video. Well done!
@winnie365 - Thanks for the comment, glad it was helpful.
Very nice thanks.
@Got2no - Glad it was helpful. Appreciate the comment.
Well done, I have a drawer full of definitely not sharp drills. Going to have spend some time at the grinder!
Thank you and Good luck, I think you will be pleasantly surprised with the results!
very good video..thanks for your time
Best video and explanation on youtube todate
@lindakingsley6765 - WOW! Thanks for the great feedback. Glad the video was helpful.
Awesome, finally I got it
fenchelteefee- Congrats! Glad this was helpful. Thanks for the comment.
Hey Bud...great idea on the large drill fixture for checking lip length....
I have watched dozens of video on drill sharpening,
and have never seen this great device....your video is to the point, pun intended....
and very well done, I also use a belt sander, and old 2x48 Kalamazoo.....
wish I had something that did not hop around so much.....I do own a
Black Diamond drill sharpener, but it only goes to 3/4"....so your technique
is very helpful......I did come up with a way to put flats on the shank of
Silver and Demming bits, by using a 5C collet and a hex collet block and
then an xy table to move the bit back and forth in front of a grinder,
which I took my Radial Arm saw and installed a grinding wheel on it....
used the arm to move the wheel in and out.....worked slick......unfortunately
my mill is under the weather, so I had to improvise....if you know what I mean....
If I use a 1/2" collet, I can put bit in the square collet block and run Back and Forth
to grind on the radial arm saw or belt sander......for really big bits.....I hope I have not
bored you with this long winded dissertation......[pun intended again]
best wishes, Paul in Orlando, Florida
Paul Brown - Glad you enjoyed the video, and not to long a story at all. I always like to hear how others improvise to get things done. That is always the challenge in the small home shop for the one off unique task is how to do it with what you have in hand. Cheers!
That was real good think you
Jerry Blankenship - Appreciate the comment, glad you enjoyed it.
Good work 👍
@chotuusian4127 - Thanks! Appreciate the comment.
At the binging of my apprenticeship I spent a month sharpening drill bits .
@jeffreyschmiedeck4254 - Sounds like some strong skill building there 😀. Thanks for the comment.
Lucky yew dint hav too rite anithing doon
Great video. I have a drill Dr, but the stone seems too course for the smaller drills. This will simplify my free hand attempts. I didn't realize it is not necessary to twist the drill as you swing it up. Thanks for putting this out there for us.
Ed glad it offered some insight. Thanks for the comment.
Hi, I’ve just found your great channel and subscribed. When you were cutting the 60 degree angle with the compound did you run the lathe in reverse? Thanks looking forward to going through your videos 👍
John Amber - Thanks for the comment. Yes I was running in reverse cutting the 60deg. Should have commented on that in the video. Just seemed easier to have the compound at that angle for feeding. I could have turned it to 30 deg the other way and run forward. Then you are just leaning over the lathe a little more to turn the compound. Thanks for the sub! Hope you enjoy the other videos.
What happened to the good old fish tail gage !
Doug Ekren - The old fish tail gauge is a great tool for threading for sure. I have a couple of them I use. With the 60 deg in the tail you can get an ok read on one edge of your drill and 60 is pretty close to 59 deg. I just tried it and it is a little hard to hold square on the shank with so little edge length in the fish tail. But, if that is what you have instead of a protractor I say go for it. Thanks for the comment.
What belt sander do you use? 🙏
J DS - That is a Coote Belt Grinder. I have had it for years and my dad has used one for over 25 years but looks like they still make and sell them - cootebeltgrinder.com. Thanks for the question.
Do you have any tips on resharpening a parabolic flute bit? These have much thicker webs than normal drill bits, and when you try to grind it like a normal drill bit, it does not look right.
Tyler Fu - I am not familiar with that type of bit. I have used some bits with a thick web and after sharpening I go in and thin the web on the trailing edge to get a more normal size chisel point. Maybe that will work for what you have?
@@BladesIIB Problem is my bench grinder can't grind a sharp corner... the edge of the wheel is rounded and no matter how hard I try to thin the web all it did is round it over. I think I need one of those belt grinder but they're really expensive over here.
@@taiwanluthiers look for a wheel dresser to square up your wheel. Either a Star dresser or a diamond dresser. They are only $20-$30 dollars and easy to come by over here. Hopefully those are easy to access for you as well.
@@BladesIIB Is it even possible to dress a normal stone wheel to be able to grind a sharp corner? A while ago I got a dressing thing but it was a single point diamond, not the hammer looking thing, and while I could dress the wheel for some reason the edge is always rounded.
@@taiwanluthiers I guess it depends on the wheel. You should be able to get a pretty good corner. Depending on the hardness if the wheel it could round over and wear pretty quickly again. But I have sharpened many drill bits in a stone wheel before using the belt grinder.
Awesome video! Do you have any day on those Dr. Drill machines? For small bits at least.
Thank you!
Edson, Glad you liked it. No I don’t have any type of sharpening machine. All done by hand.
@@BladesIIB thank you for replying! i own a couple of them and they seem pretty good at it. Also, did you get my message about sharpening cutting boots for different materials and cuts? I think it would be the first and only on UA-cam! It’s something i think manny don’t know enough to decide how to shape their tools for each job. Thank you for the great content you put up and your precious time!
Peace!
@@roadshowautosports From what I know, yes the Drill Dr. works well for sharpening. We had something at the shop I worked at 30 years ago and mainly just used it for large bits. Bottom line go with what works best and what you have. I saw your other note, I am good with making any shape tool I need. I am not an expert on all the angles though. Other than on drill bits or threading tools I don’t usually measure any angles on my cutting tools. I will see what I can come up with. Thanks for the feedback.