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Posted by RichK on June 14, 2006, 8:13 pm
Hi All,
I have a pile of dull drill bits, that don't bite anymore. At one time
there was an add on TV for some sharpening device. I'm always skeptical of
TV adds for gadget, but...
Is it practical to sharpen drill bits? Where would I look for that? It's
not something that comes up in a conversation very often.
Maybe I've bought cheap bits, but how you what's good v. just expensive.
They all have some line about carbide etc., but for me they never last.
These are for metal, under 1/2 dia.
Regards,
RichK
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Posted by Steve B on June 14, 2006, 8:24 pm
> Hi All,
>
> I have a pile of dull drill bits, that don't bite anymore. At one time
> there was an add on TV for some sharpening device. I'm always skeptical
> of
> TV adds for gadget, but...
>
> Is it practical to sharpen drill bits? Where would I look for that? It's
> not something that comes up in a conversation very often.
>
> Maybe I've bought cheap bits, but how you what's good v. just expensive.
> They all have some line about carbide etc., but for me they never last.
> These are for metal, under 1/2 dia.
>
> Regards,
>
> RichK
>
Well, Rich, I'll get back to you.
I have about 300 drill bits, and I would estimate that probably half are
dull.
I used to work conventions, and bought a Drill Doctor 750. The cherry on
the machine is yet to be broken.
Yes, I think that sharpening bits can be a good thing. And, as drill bits
can cost as much as ten cents at a yard sale, the potential for having a
full index of sharp bits is pretty good.
That is, for people who actually take the time to sharpen them. My father
was a flight engineer on bombers in WW2. He could take a three by one inch
stone and sharpen any drill bit in a very short time.
For me, I have all the modern technology, and I still have a drawer full of
dull bits.
Like I say, I'll get back to you.
Steve
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Posted by RichK on June 14, 2006, 10:17 pm
> Well, Rich, I'll get back to you.
>
> I have about 300 drill bits, and I would estimate that probably half are
> dull.
Well, you have 275 more than I do :-) It took me 20 years to get them all
dull. Had to drill out some old rusted bolts on a car and some of the new
bits I had would not even touch the bolt.
Now I all my bits are dull, but I did get those bolts out.
> I used to work conventions, and bought a Drill Doctor 750. The cherry on
> the machine is yet to be broken.
There are some on e-bay of that model. I assume this unit uses some
grinding stones. Wonder if they are replacable, if I were to get a used
sharpener. I can't see getting a new one, as I don't drill all that much.
> Yes, I think that sharpening bits can be a good thing. And, as drill bits
> can cost as much as ten cents at a yard sale, the potential for having a
> full index of sharp bits is pretty good.
Have not even considered it - but it you have a sharpener, it would be a
great source.
Regards,
RichK
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Posted by Dave on June 15, 2006, 12:08 am
I worked in the tool crib for 25+ years and we tried various and
expensive machines to sharpen bits and we always went back to doing it
by hand. It is much faster and easy to do when you get the hang of it. I
could sharpen bits that would drill to within .005 of the drill
diameter. Like I say all it takes is practice. Go to the library and get
a book that shows the characteristics of a drill bit. Buy a cheap
protracter ( for measuring the angles ) and if you have a grinder you
are all set.
RichK wrote:
>
>
>>Well, Rich, I'll get back to you.
>>
>>I have about 300 drill bits, and I would estimate that probably half are
>>dull.
>
>
> Well, you have 275 more than I do :-) It took me 20 years to get them all
> dull. Had to drill out some old rusted bolts on a car and some of the new
> bits I had would not even touch the bolt.
>
> Now I all my bits are dull, but I did get those bolts out.
>
>
>>I used to work conventions, and bought a Drill Doctor 750. The cherry on
>>the machine is yet to be broken.
>
>
> There are some on e-bay of that model. I assume this unit uses some
> grinding stones. Wonder if they are replacable, if I were to get a used
> sharpener. I can't see getting a new one, as I don't drill all that much.
>
>
>>Yes, I think that sharpening bits can be a good thing. And, as drill bits
>>can cost as much as ten cents at a yard sale, the potential for having a
>>full index of sharp bits is pretty good.
>
>
> Have not even considered it - but it you have a sharpener, it would be a
> great source.
>
> Regards,
>
> RichK
>
>
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Posted by Steve B on June 14, 2006, 8:24 pm
> Hi All,
>
> I have a pile of dull drill bits, that don't bite anymore. At one time
> there was an add on TV for some sharpening device. I'm always skeptical
> of
> TV adds for gadget, but...
>
> Is it practical to sharpen drill bits? Where would I look for that? It's
> not something that comes up in a conversation very often.
>
> Maybe I've bought cheap bits, but how you what's good v. just expensive.
> They all have some line about carbide etc., but for me they never last.
> These are for metal, under 1/2 dia.
>
> Regards,
>
> RichK
>
>
Ask your question at rec.crafts.metalworking and you will get lots of spot
on information.
Steve
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