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Posted by Tom Gardner on April 28, 2008, 3:41 pm
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>I was kind of hoping that the steel was not going to be as hard as all that
>and that all the cutting would have been done by the little round diamond
>head. I have a set of diamond core drills where the shank is something like
>brass! I can bend it with my fingers.
>
> The reason I liked the drill for the purpose was that it looked good in
> the application, including the blob at the end.
>
> I do not think it is worth spending enormous amounts of money on this, I
> shall go back to the welding rods which cost pennies.
>
> Thanks anyway.
>
> --
> Michael Koblic,
> Campbell River, BC
>
>
>> On Sun, 27 Apr 2008 20:06:54 -0700, "Michael Koblic"
>> A die is a tool that cuts metal. A drill is a tool that cuts metal.
>> Rock and hard spot.
>>
>> Ya can't saw wood with a saw made of similar wood.
>>
>
>
Always try a file on a piece of steel that you want to cut with a tool. If
the file cuts easily, your cutting tool should work ok.
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Posted by Michael Koblic on April 28, 2008, 4:07 pm
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>
>>I was kind of hoping that the steel was not going to be as hard as all
>>that and that all the cutting would have been done by the little round
>>diamond head. I have a set of diamond core drills where the shank is
>>something like brass! I can bend it with my fingers.
>>
>> The reason I liked the drill for the purpose was that it looked good in
>> the application, including the blob at the end.
>>
>> I do not think it is worth spending enormous amounts of money on this, I
>> shall go back to the welding rods which cost pennies.
>>
>> Thanks anyway.
>>
>> --
>> Michael Koblic,
>> Campbell River, BC
>>
>>
>>> On Sun, 27 Apr 2008 20:06:54 -0700, "Michael Koblic"
>>> A die is a tool that cuts metal. A drill is a tool that cuts metal.
>>> Rock and hard spot.
>>>
>>> Ya can't saw wood with a saw made of similar wood.
>>>
>>
>>
>
> Always try a file on a piece of steel that you want to cut with a tool.
> If the file cuts easily, your cutting tool should work ok.
>
Now why did I not think of that? And I am not being sarcastic. Why is the
best answer always sort of obvious. Jeez, I even carry a small file around
with me at the garage sales for that purpose...Oh, well, old age is
beginning to take its toll...
BTW how about spark-testing?
Michael Koblic,
Campbell River, BC
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Posted by Tom Gardner on April 28, 2008, 8:41 pm
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>
>>
>>>I was kind of hoping that the steel was not going to be as hard as all that
>>>and that all the cutting would have been done by the little round diamond
>>>head. I have a set of diamond core drills where the shank is something like
>>>brass! I can bend it with my fingers.
>>>
>>> The reason I liked the drill for the purpose was that it looked good in the
>>> application, including the blob at the end.
>>>
>>> I do not think it is worth spending enormous amounts of money on this, I
>>> shall go back to the welding rods which cost pennies.
>>>
>>> Thanks anyway.
>>>
>>> --
>>> Michael Koblic,
>>> Campbell River, BC
>>>
>>>
>>>> On Sun, 27 Apr 2008 20:06:54 -0700, "Michael Koblic"
>>>> A die is a tool that cuts metal. A drill is a tool that cuts metal.
>>>> Rock and hard spot.
>>>>
>>>> Ya can't saw wood with a saw made of similar wood.
>>>>
>>>
>>>
>>
>> Always try a file on a piece of steel that you want to cut with a tool. If
>> the file cuts easily, your cutting tool should work ok.
>>
> Now why did I not think of that? And I am not being sarcastic. Why is the best
> answer always sort of obvious. Jeez, I even carry a small file around with me
> at the garage sales for that purpose...Oh, well, old age is beginning to take
> its toll...
>
> BTW how about spark-testing?
>
> Michael Koblic,
> Campbell River, BC
>
I'm a big fan of spark testing. It's a big plus if you have known samples of
different alloys so you can do instant comparisons.
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Posted by Don Foreman on April 28, 2008, 5:57 pm
Please log in for more thread options On Mon, 28 Apr 2008 12:15:03 -0700, "Michael Koblic"
>I was kind of hoping that the steel was not going to be as hard as all that
>and that all the cutting would have been done by the little round diamond
>head. I have a set of diamond core drills where the shank is something like
>brass! I can bend it with my fingers.
Ooops. I overlooked the diamond part. That shank could be anything.
You may just have a bum die.
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Posted by DoN. Nichols on April 28, 2008, 6:22 pm
Please log in for more thread options > I have been using a Mastercraft 6-32 die to cut thread on a 1/8 welding rod
> to use (a small section of) as a gnomon for a miniature sundial. No
> problems. Today I had the bright idea to use a diamond drill bit with the
> round head worn out and a 1/8" shank in a similar fashion.
>
> Not only could I not make any impression on the drill bit with the die but
> when subsequently I tried the same die on the usual welding rod, it would
> not cut at all. To all intents and purposes the die is dead.
Out of curiosity -- is the die hexagonal in shape? If so, it is
what is commonly called a "rethreading die" -- high carbon steel, not
HSS (High Speed Steel), and make for cleaning up damaged threads on
something which already has been threaded once.
Not sure about what the shank of your diamond drill is made of.
Some would be mild steel brazed or welded to harder steel, and then
coated with the diamonds and a metal film to hold it in place. Others
may have been started from HSS.
But also, the diameter of the shank may be a bit larger than the
welding rod. Hmm ... a 6-32 should fit a 0.138" clearance hole, and
thus be just a little smaller -- not as small as 1/8".
Anyway -- before you try your replacement (and hopefully HSS)
round bodied die on it -- you should first see whether you can file the
shank with a standard metal file. If it just skates over the shank, you
can't thread it with your die. The only way to thread it would be to
grind threads into it -- a rather expensive thing to set up to do.
Good luck,
DoN.
--
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
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>and that all the cutting would have been done by the little round diamond
>head. I have a set of diamond core drills where the shank is something like
>brass! I can bend it with my fingers.
>
> The reason I liked the drill for the purpose was that it looked good in
> the application, including the blob at the end.
>
> I do not think it is worth spending enormous amounts of money on this, I
> shall go back to the welding rods which cost pennies.
>
> Thanks anyway.
>
> --
> Michael Koblic,
> Campbell River, BC
>
>