tapered bit drilling

For discussion of fitting and shaping stems, doing inlays, and any other stem-related topic.
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BigCasino
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tapered bit drilling

Post by BigCasino »

I Think I may be drilling mystems to deep with the tapered bit I usually stop with the tapered bit about ¾ of an inch from the button and then open it up from there, any thoughts or recommendations?
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sandahlpipe
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Re: tapered bit drilling

Post by sandahlpipe »

That's about what I do. What makes you think it's too deep?
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BigCasino
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Re: tapered bit drilling

Post by BigCasino »

Working the slot, forming the funnel not sure if the funnel is deep enough..... Don't know really, someone mentioned for me to make my funnel deeper, was thinking I was possibly drilling to deep, maybe just a less sharp angle on funnel then
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sandahlpipe
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Re: tapered bit drilling

Post by sandahlpipe »

On a tapered airway, the slot will overlap the taper. The purpose of the slot is to evenly distribute the smoke through the button so the heat doesn't concentrate on one spot. In a shallow funnel, the smoke is moving too rapidly to make use of the slot. With a deeper funnel, the smoke has time to flatten out to the sides before exiting the button.
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scotties22
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Re: tapered bit drilling

Post by scotties22 »

A wider, deeper funnel will also improve your draw quite a bit. I drill with my tapered bit to between 1" - 1.5" and then finish it off with my smaller bit through the button end. Then I open the slot and funnel it down to where ever I stopped the tapered bit.
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oklahoma red
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Re: tapered bit drilling

Post by oklahoma red »

Another approach is a semi "shape first-drill second" applied to stems. Drill an inch or so with your tapered airway bit. Do the same with the small bit on the button end, going as deep as you can reach, then shape your funnel. After you've shaped the outside do some careful measuring and determine how deep you can re-drill with the tapered bit before the taper gets too close to the outer surface. Go back to the button end and finish up the innards where the taper and funnel meet. The obvious advantage with this method is that there are no worries about hitting the airway when you are shaping the stem. Never done that you say? HA! You lie! As with any stem making a healthy dose of the "P" principle (Proper Planning Prevents Piss-Poor Performance) is required.
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BigCasino
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Re: tapered bit drilling

Post by BigCasino »

No I have done that, lol I just feel like if I drill to ¾ then form the funnel over and inch deep that the draw would be too open , just pondering some thoughts
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PremalChheda
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Re: tapered bit drilling

Post by PremalChheda »

BigCasino wrote:No I have done that, lol I just feel like if I drill to ¾ then form the funnel over and inch deep that the draw would be too open , just pondering some thoughts
If opened correctly, the only restriction should be the diameter of your draft hole. 9/64" is plenty, but some prefer to go to 5/32". For practical purposes the slot volume should be a little greater than the volume of the draft hole so there is no pinching effect.
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RadDavis
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Re: tapered bit drilling

Post by RadDavis »

Everyone does this differently. :)

I drill with my tapered bit to within about 1/8" of the end of the stem, finish with the 1/16" bit and go from there. I've never had a problem with the draw, and it's been about 9 years since I shaped a stem into the smoke channel. :lol:

Hope this helps.

Rad
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RadDavis
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Re: tapered bit drilling

Post by RadDavis »

sandahlpipe wrote:On a tapered airway, the slot will overlap the taper. The purpose of the slot is to evenly distribute the smoke through the button so the heat doesn't concentrate on one spot. In a shallow funnel, the smoke is moving too rapidly to make use of the slot. With a deeper funnel, the smoke has time to flatten out to the sides before exiting the button.
Not to be too much of a George, but can you enlighten us on how you came to these conclusions? :lol:

Rad
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sandahlpipe
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Re: tapered bit drilling

Post by sandahlpipe »

RadDavis wrote:
sandahlpipe wrote:On a tapered airway, the slot will overlap the taper. The purpose of the slot is to evenly distribute the smoke through the button so the heat doesn't concentrate on one spot. In a shallow funnel, the smoke is moving too rapidly to make use of the slot. With a deeper funnel, the smoke has time to flatten out to the sides before exiting the button.
Not to be too much of a George, but can you enlighten us on how you came to these conclusions? :lol:

Rad
Just gonna say conjecture, though I think it is a testable theory, I don't have the resources to test it scientifically. Didn't read this on the internet anywhere, I just thought a lot about what's happening to the smoke as it passes down the airway and the scientific principles that apply to condensation, aerodynamics and testing whether there is an improvement when I do it one way or another.


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PremalChheda
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Re: tapered bit drilling

Post by PremalChheda »

sandahlpipe wrote:
RadDavis wrote:
sandahlpipe wrote:On a tapered airway, the slot will overlap the taper. The purpose of the slot is to evenly distribute the smoke through the button so the heat doesn't concentrate on one spot. In a shallow funnel, the smoke is moving too rapidly to make use of the slot. With a deeper funnel, the smoke has time to flatten out to the sides before exiting the button.
Not to be too much of a George, but can you enlighten us on how you came to these conclusions? :lol:

Rad
Just gonna say conjecture, though I think it is a testable theory, I don't have the resources to test it scientifically. Didn't read this on the internet anywhere, I just thought a lot about what's happening to the smoke as it passes down the airway and the scientific principles that apply to condensation, aerodynamics and testing whether there is an improvement when I do it one way or another.


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You do have the resources to test it scientifically. Blow smoke through the tenon hole and see it come out the slot on a short slot and long slot.

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RadDavis
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Re: tapered bit drilling

Post by RadDavis »

sandahlpipe wrote:
Just gonna say conjecture, though I think it is a testable theory, I don't have the resources to test it scientifically. Didn't read this on the internet anywhere, I just thought a lot about what's happening to the smoke as it passes down the airway and the scientific principles that apply to condensation, aerodynamics and testing whether there is an improvement when I do it one way or another.
Here's what I would do: Test it. :wink:

If you can't test it or don't have the resources to test it then don't make statements like you did with nothing to back it up but conjecture. A conjecture is a proposition that is unproven, and therefore has no value in a thread like this. It only adds confusion, especially when stated as fact.

There is a lot of voodoo involved in the sport of pipe smoking, and adding to it doesn't help. :)

I don't mean to hurt your feelings, but there is so much bullshit passed around in forums as fact, that it makes me crazy. The Pipemaker's Forum is the last place that conjecture should be put forth as fact, "just because it seems that way to me".

Hope this helps. :lol:

Rad
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Sasquatch
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Re: tapered bit drilling

Post by Sasquatch »

PremalChheda wrote:
BigCasino wrote:No I have done that, lol I just feel like if I drill to ¾ then form the funnel over and inch deep that the draw would be too open , just pondering some thoughts
If opened correctly, the only restriction should be the diameter of your draft hole. 9/64" is plenty, but some prefer to go to 5/32". For practical purposes the slot volume should be a little greater than the volume of the draft hole so there is no pinching effect.

Here's some more of that bullshit/voodoo/conjecture. Premal, I will say to you that the magic of a Sasquatch pipe is that there is tremendous constriction in the stem as compared to the airway, and that "constant volume" airway ideals are fine, but there are other ways to skin a cat. I am the Egg Man. I am the Egg Man. I am the Venturi. Coo Coo K'choo. (Or Goo Goo G'joob as it was originally printed on the album sleeve).


Anyway my advice to the OP for what it's worth is to worry less about this kind of shit. If smoke comes out when you suck and a pipe cleaner fits through it but doesn't rattle around, you're probably close.
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PremalChheda
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Re: tapered bit drilling

Post by PremalChheda »

Sasquatch wrote:
PremalChheda wrote:
BigCasino wrote:No I have done that, lol I just feel like if I drill to ¾ then form the funnel over and inch deep that the draw would be too open , just pondering some thoughts
If opened correctly, the only restriction should be the diameter of your draft hole. 9/64" is plenty, but some prefer to go to 5/32". For practical purposes the slot volume should be a little greater than the volume of the draft hole so there is no pinching effect.

Here's some more of that bullshit/voodoo/conjecture. Premal, I will say to you that the magic of a Sasquatch pipe is that there is tremendous constriction in the stem as compared to the airway, and that "constant volume" airway ideals are fine, but there are other ways to skin a cat. I am the Egg Man. I am the Egg Man. I am the Venturi. Coo Coo K'choo. (Or Goo Goo G'joob as it was originally printed on the album sleeve).


Anyway my advice to the OP for what it's worth is to worry less about this kind of shit. If smoke comes out when you suck and a pipe cleaner fits through it but doesn't rattle around, you're probably close.
Sorry I did not communicate my words properly to what I was thinking. I was only talking about the draft hole in the stem, not the briar, and the practical purpose of the slot having more room than the draft hole in the stem is so a pipe cleaner does not get pinched on the way back out so pipe juice doesn't get squeezed out back into the stem hole and it keeps gurgling.
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Charl
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Re: tapered bit drilling

Post by Charl »

Oh boy, here we go again!
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d.huber
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Re: tapered bit drilling

Post by d.huber »

I've been thinking of eschewing stems on my pipes and just shipping them with a garden hose.
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oklahoma red
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Re: tapered bit drilling

Post by oklahoma red »

d.huber wrote:I've been thinking of eschewing stems on my pipes and just shipping them with a garden hose.
Just start making hookahs.
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Re: tapered bit drilling

Post by wdteipen »

Alright, don't make me bring out the picture of the stummel with the straw sticking out of it. Who posted that originally anyway?
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scotties22
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Re: tapered bit drilling

Post by scotties22 »

It was Brian
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