New and Terrifying Drill Bit Sharpener

[RTM]

I was hoping to find a slightly vintage drill bit holder on eBay ( didn't), but this showed up in the match fewer words category. At first glance, I thought it mounted on the side of a bench grinder, and pivoted to allow sharpening any size. But once I clicked thru, you mount this on a 5" angle grinder wheel, and run it against a surface to sharpen your bit.

Is this natural selection, or what exactly?

Pardon Our Interruption...

 

[MichaelP]

Darwin Award.

But isn't it an ambulance in the lower right corner of the ad?

 

[mike93lx]

20% off? Seems ambitious think that you will commit to the second finger after the first one is gone

 

[WildBill]

I 3d printed one of these and have used it many times. But I also drive a car with a permanent check engine light on and use Gmail.

 

[MichaelP]

I 3d printed one of these and have used it many times.

Let me guess. You used it less than ten times, because you still type posts and use Gmail. Right?

 

[PelicanPines]

Think grinder guard... Now imagine the orange thing attaches to the grinder like the guard does. Looks good to me. Plus I lived in a Holiday Inn once... For 18 months.

 

[nadogail]

New Drill Bits are less expensive than Hospital Visits

 

[RTM]

Think grinder guard... Now imagine the orange thing attaches to the grinder like the guard does. Looks good to me. Plus I lived in a Holiday Inn once... For 18 months.

Looks like it attached to the wheel, then they used it in polishing the top. Look at the ad closely.

 

[mike93lx]

Looks like it attached to the wheel, then they used it in polishing the top. Look at the ad closely.

How would it attach to the wheel and function?

 

[RTM]

How would it attach to the wheel and function?

I don’t know. This image shows them attaching it to the wheel, I don’t see a guard. One of the other pix does show the drill bits point down.

 

[Chris_Hamilton]

Let me guess. You used it less than ten times, because you still type posts and use Gmail. Right?

So typing my posts and using Gmail is out dated? What should I be doing?

 

[PCustoms]

I don’t know. This image shows them attaching it to the wheel, I don’t see a guard. One of the other pix does show the drill bits point down.

Pic 1 shows the guard

Orange thing looks to slip over guard and get secured by thumbscrews

 

[5ubtle]

Poor instructions with a Chinese product? I am shocked!

I don't believe that it will sharpen the bits. There won't be any back relief.

 

[PelicanPines]

How would it attach to the wheel and function?

I did look... It attaches as the guard does.

 

[PelicanPines]

I don’t know. This image shows them attaching it to the wheel, I don’t see a guard. One of the other pix does show the drill bits point down.

The orange thing Replaces the guard. Nevertheless it does not attach to the grinding wheel.

 

[mike93lx]

I don’t know. This image shows them attaching it to the wheel, I don’t see a guard. One of the other pix does show the drill bits point down.

It simple can't attach to the wheel, so something is either missing in the Pic, or the pics are photochopped

 

[zendriver]

Looks easier to use than the drill Doctor, which requires 3 steps.

No way can it work, with 2 steps.

 

[BrandonV]

'Aint no way I'm wasting time sharpening HSS bits.

 

[Notgrownup]

Hold my beer.

 

[cvairwerks]

Great unit to destroy your bits... No way to set the proper face angle based on the particular bit.

 

[rdoty]

It simple can't attach to the wheel, so something is either missing in the Pic, or the pics are photochopped

If you look closely at the first picture you can see the rim of the guard on the left side, almost covered by the "sharpener". It looks like it slips/clips over the guard and is stationary during operation.

 

[mike93lx]

Great unit to destroy your bits... No way to set the proper face angle based on the particular bit.

Sometimes you gotta do what you gotta do. I've sharpened bits with a right angle die grinder to finish a project

But if the bit is dull and you have no other way to sharpen it, I'd argue the bit is already destroyed

 

[AreBeeBee]

And if the sharpening jig slips and spins up from the grinder wheel's rotation, the bit sleeves are all nicely angled outward to shoot the bit off into the scenery. What percentage of a full 360° circle does your anatomy occupy? Them's your odds of stopping a flyaway drill bit.

 

[LopezBart]

Small bits (less than perhaps 3/16" or 1/8") are annoying to sharpen by hand, and are cheap enough to just buy new.
It is not difficult to learn to sharpen larger bits freehand on a nice grinding wheel.

 

[cvairwerks]

Sometimes you gotta do what you gotta do. I've sharpened bits with a right angle die grinder to finish a project

But if the bit is dull and you have no other way to sharpen it, I'd argue the bit is already destroyed

True, but if you know the angle, you can reasonably approximate it. With that jig, you have no idea what the angle is set for, so you get whatever it was printed at.
For me, anything smaller than 1/2" is not worth resharpening due to time requirements. I simply buy the sizes I use, in bulk. Most of what I need are 118 degree split point bits, in jobber to 12" lengths, in HSS, carbide and cobalt.

 

[mike93lx]

True, but if you know the angle, you can reasonably approximate it. With that jig, you have no idea what the angle is set for, so you get whatever it was printed at.
For me, anything smaller than 1/2" is not worth resharpening due to time requirements. I simply buy the sizes I use, in bulk. Most of what I need are 118 degree split point bits, in jobber to 12" lengths, in HSS, carbide and cobalt.

The people using that jig don't know drill bits have angles

 

[MichaelP]

So typing my posts and using Gmail is out dated? What should I be doing?

I meant you needed at least one finger to type.

 

[Beerhippie]

Using the side of a cut-off wheel to sharpen things? What could possibly go wrong?

 

[jayemm]

Darwin Award.

But isn't it an ambulance in the lower right corner of the ad?

Yes, but it also comes in green and yellow.

 

[WildBill]

Here's one for a dremel, might be safer. Probably more likely to break a disc though. https://www.printables.com/model/133233-drillbit-sharpening-jig-for-dremel

 

[Beerhippie]

I have a tungsten sharpener for my Dremel:



But it uses a bonded (nickel on steel) diamond disk which is completely enclosed in use. Works well and I can hook it up to dust collection.

A 14,000 rpm cut-off wheel being worn on the sides and enclosed in a cheap piece of plastic? Uh-uh. I've already had to pull a piece of exploded cut-off wheel out of my earlobe (went right through my cheapo face shield). Once is enough for me.

Oops That was the crappy one--I thought I'd tossed it. Here's the good one:

 

[cvairwerks]

Beerhippie: Is the good one from Sonnler?

 

[Beerhippie]

Beerhippie: Is the good one from Sonnler?

Yes, it is.

https://www.amazon.com/gp/product/B0CPV6J5GS/?tag=atomicindus08-20

This one has more options for electrode sizes and angles than the cheap one ('though it certainly wasn't expensive) and the holes fit the 'trodes better. I'm getting very good, repeatable results from it--and the grinding marks are pretty well parallel to the 'trode.