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When boredom overtakes, make something, anything!

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Tony sacc17/08/2023 05:10:56
69 forum posts
74 photos

four facet drill.jpg30739205_2036449039948465_7668901528505155584_n.jpg30716241_2036449129948456_743359397559795712_n.jpgjig and box.jpgbox.jpgjig on table with drill.jpg15578080_220357811748625_5357883484170788874_o.jpgjig assembled.jpgjig knobs.jpgjig partly assembled.jpgjigs disassembled.jpgjig platform.jpgI get bored easy, when I do, I make something I don't need, this is one of those things - a drill sharpening jig.

I normally sharpen drills by hand/eye, but I have used this on occasion to good effect. It's particularly good for sharpening drills when you require an accurately sized hole without resorting to a reamer. When sharpening by hand, no matter how good you think you are, there will always be some discrepancy in the length of the cutting shoulders, so the hole it drills will be equal to twice the length of the longest shoulder, this isn't normally a problem with jigs.

I made the main body from 25mm square stock, machined a V on one side and cut a slot in the bottom of the V. There's a hole through miiddle which contains a 6mm threaded rod. riding on the threaded rod is a nut to which I welded a fin the fin pokes through the slot into the V. The end of the threaded rod has a knurled adjusting knob and a knurled locking nut.

I vaguely remember including an advance rod backlash adjuster, but can't remember how I did it.

On top of the main body is a U shaped bracket with a clamping screw, the clamping screw acts on an H plate which slides up and down inside the U shaped bracket, that clamps the drill bit in place and the shark fin nut acts on the back of the drill bit thus advancing it. At the front there is a tapped hole for attaching an indexing pointer but I've never used it.

The main body is attached to a 6mm plate which has a 12mm guide plate fastened underneath. The angle is set at 118 degrees and is not adjustable.

The jig is useless by itself, so I made a table with a 12mm slot across the middle in which the guide plate runs. So to use, clamp the drill in place and slide the jig across the table, thus grinding a facet. To advance the drill, turn the knob and lock it off with the locking nut, when one side is done, turn the drill over 180 degrees using the indexing pointer and repeat.

Cutting angle and relief angle are adjustable by angling the table. I do have marks on the table for this, but they are useless as the wheel gets smaller with use, making the marks redundant.

Probably over complicated in design, but it is simple to use and it works well. You can grind the web thinner at the tip with a diamond wheel, but I've never found it necessary as a conically sharpened drill has more of a chisel point that a facet sharpened drill has.

Now before you feel moved to point out one shoulder of the drill looks longer than the other, take a look at the angle of the drill to the camera, nuff said?

I made a wooden box for it and, in Chinese script, wrote 'drill sharpening jig' on top. Just to give it a bit of cred, we all know the best tools come from China, right?1.jpg

John Haine17/08/2023 07:05:13
5563 forum posts
322 photos

Nice!

Thor 🇳🇴17/08/2023 08:28:39
avatar
1766 forum posts
46 photos

Well, I think a drill sharpening jig is useful. I use a drill sharpening jig I bought decades ago, it works - sort of.

Thor

Tony sacc17/08/2023 09:37:36
69 forum posts
74 photos

I agree, I'm just lazy, can't be bothered digging it out of the box. Of course I've been hand sharpening drill bits since I was 15, that was 57 years ago, I just find it easier and quicker.

Bazyle17/08/2023 10:10:50
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6956 forum posts
229 photos

Looks nice . If you had labelled the box 'Made in Sheffield' you could be sure it would be valued after your death and still in use in fifty years. As is it will end up in China, in a consignment of scrap going to the furnace.

Andrew Johnston17/08/2023 10:56:56
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7061 forum posts
719 photos

Being truly lazy I just buy new drills, at least in small sizes, say less than 1/2". embarrassed

Andrew

Tony sacc17/08/2023 11:27:55
69 forum posts
74 photos

That must cost you a bomb. I don't know about prices where you are, but in Oz a 10mm HSS is around $14. Cobalt, which I mostly use, are twice that. That's around £7, £14 for cobalt.

Andrew Johnston17/08/2023 21:38:35
avatar
7061 forum posts
719 photos

In the UK a 10mm HSS TiN 4-facet drill is around £6. Most of the replacement drills I buy are less than 6mm, so a pound or two. I run my drills fairly hard so they are normally beyond a simple resharpen when replaced.

If I really need to resharpen a drill then I can do it by hand, or use the Clarkson T&C cutter grinder and drill and tap accessory.

Andrew

Bill Phinn17/08/2023 22:44:22
1076 forum posts
129 photos

Nice work on the jig, Tony. It's a big one too.

Credit to you for trying Chinese characters as well, though you've wrongly divided the first two characters into four by separating the radicals from the rest of each character, and the Chinese isn't really idiomatic, e.g. 筆刀 means pen-knife, which is not really a jig, is it?

Also this Chinese machinist, in talking about grinding or sharpening drills, uses the common verb 磨 rather than 削, as you have done. See the video from 26 minutes in.

Edited By Bill Phinn on 17/08/2023 22:47:07

Tony sacc18/08/2023 04:08:28
69 forum posts
74 photos

Its just my attempt at Chinglish. At least it doesn't actually say F off.  I passed it by a Chinese girl who spoke Cantonese, she didn't know, said it was maybe something like drill sharpener.  So apparently event the Chinese can't speak Chinese, Cantonese or Mandarin.  Maybe,the Chinese are like the Malays, and have two versions of their language, one spoken by the well educated, the other spoken by market people.

Edited By Tony sacc on 18/08/2023 04:13:09

Bill Phinn18/08/2023 14:40:12
1076 forum posts
129 photos
Posted by Tony sacc on 18/08/2023 04:08:28:

Maybe,the Chinese are like the Malays, and have two versions of their language, one spoken by the well educated, the other spoken by market people.

There are hundreds of mutually unintelligible Chinese dialects, Fortunately, however, there is also such a thing as standard Mandarin Chinese, based on the Beijing dialect, which a large number of speakers of other dialects can also communicate in to greater or lesser extents.

Posted by Tony sacc on 18/08/2023 04:08:28:

I passed it by a Chinese girl who spoke Cantonese, she didn't know, said it was maybe something like drill sharpener. So apparently event the Chinese can't speak Chinese, Cantonese or Mandarin.

I'm unsure how this experience leads you to conclude that the Chinese girl couldn't speak Chinese; her confusion was probably largely a result of the highly non-standard nature of the written Chinese you presented her with. She also probaby didn't want you to lose face by telling you, to your face, what I was less hesitant in telling you about it.

Incidentally, an appeal to all readers: please never emulate newsreaders and others who pronounce the "j" in Beijing like in the French "je" etc. There is no such sound in Mandarin. The Chinese Pinyin consonant "j" is pronounced, very straightforwardly, like the "j in the English word "jingle".

Tony sacc18/08/2023 23:58:04
69 forum posts
74 photos

Blah, blah, blah.

Edited By Tony sacc on 18/08/2023 23:59:06

Andrew Johnston19/08/2023 13:39:33
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7061 forum posts
719 photos
Posted by Tony sacc on 18/08/2023 23:58:04:

Blah, blah, blah.

Now I see why the OP wrote in his profile that he'd never taken a class in anything.

Bored now, so going to carry on making parts on the repetition lathe.

Andrew

Tony sacc20/08/2023 13:01:04
69 forum posts
74 photos

I think that people who have to be taught everything are lacking imagination and the ability to think for themselves. . If you have to be taught how to do everything, you're just repeating other's mistakes,you'll never learn and you'll never be better than those you learnt from. So, think for yourself, dare to be better yourself. I've spent a lifetime fixing tradesmen's stuff ups.

Same goes for those who work from plans,you're just copying someone else's work, think for yourself, design something yourself, don't cheat!.

I'm sure you'll all hate this, sorry no apologies!

Baz20/08/2023 13:51:29
1033 forum posts
2 photos

Must be nice to be so bl**dy wonderful, I am just a mere mortal, I had to do an apprenticeship for five years and seven years at college to learn from others and I build from plans so obviously I am too stupid to think for myself, I have never used the ignore member feature of this site but in your case I will make an exception.

Michael Gilligan20/08/2023 14:00:23
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23121 forum posts
1360 photos

Posted by Bill Phinn on 18/08/2023 14:40:12:

.

There are hundreds […]

.

Thanks for an informative post, Bill yes

MichaelG.

Tony sacc20/08/2023 23:30:44
69 forum posts
74 photos
Posted by Baz on 20/08/2023 13:51:29:

Must be nice to be so bl**dy wonderful, I am just a mere mortal, I had to do an apprenticeship for five years and seven years at college to learn from others and I build from plans so obviously I am too stupid to think for myself, I have never used the ignore member feature of this site but in your case I will make an exception.

Thank you!

BTW, I'm not Bl@@dy wonderful at all, just ask the members of this group.  However, I do have imagination and can think for myself.

Edited By Tony sacc on 20/08/2023 23:36:19

Dave Halford21/08/2023 11:11:26
2536 forum posts
24 photos
Posted by Tony sacc on 18/08/2023 04:08:28:

Its just my attempt at Chinglish. At least it doesn't actually say F off. I passed it by a Chinese girl who spoke Cantonese, she didn't know, said it was maybe something like drill sharpener. So apparently event the Chinese can't speak Chinese, Cantonese or Mandarin. Maybe,the Chinese are like the Malays, and have two versions of their language, one spoken by the well educated, the other spoken by market people.

Edited By Tony sacc on 18/08/2023 04:13:09

No Tony it's just that you can't write any form of Chinese properly and I wonder how that XS 650 got built without drawings.

Tony sacc21/08/2023 12:43:43
69 forum posts
74 photos
Posted by Dave Halford on 21/08/2023 11:11:26:
Posted by Tony sacc on 18/08/2023 04:08:28:

Its just my attempt at Chinglish. At least it doesn't actually say F off. I passed it by a Chinese girl who spoke Cantonese, she didn't know, said it was maybe something like drill sharpener. So apparently event the Chinese can't speak Chinese, Cantonese or Mandarin. Maybe,the Chinese are like the Malays, and have two versions of their language, one spoken by the well educated, the other spoken by market people.

Edited By Tony sacc on 18/08/2023 04:13:09

No Tony it's just that you can't write any form of Chinese properly and I wonder how that XS 650 got built without drawings.

I agree, I have no idea how to write Chinese,not even improperly, that's probably because I'm not Chinese. Just some characters I pulled off the internet.

You need a drawing to build a bike? I don't know anybody who does that. I guess it's down to visualising what you're after, and dare I say it - imagination!

SillyOldDuffer21/08/2023 13:48:21
10668 forum posts
2415 photos
Posted by Tony sacc on 21/08/2023 12:43:43:
Posted by Dave Halford on 21/08/2023 11:11:26:
Posted by Tony sacc on 18/08/2023 04:08:28:...

... I wonder how that XS 650 got built without drawings.

...

You need a drawing to build a bike? I don't know anybody who does that. ...

Wot, not even Yamaha? I think they do!

Imaginative talented customisation is a very good thing, but it's not to be confused with engineering design from first principles. Try this for size. Move into an unfamiliar branch of engineering, perhaps electronics. If that's genuinely new territory, please design an electronic ignition system for the XS 650. All your own work please - do not attend a class, consult books, search the internet, or ask anyone else. We'll mark the result!

Engineering from scratch is very difficult to do without plans, drawings, education, a good library, skilled support, prototyping and plenty of hard maths. Mostly done by teams, not individuals. Can take a long time too - about 200 years to get steam engines working at peak efficiency...

Dave

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