A perfect storm replacement stem
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A perfect storm replacement stem
I haven't posted any shop work in a while because it's usually a case of "same thing, different day". Seen one, you've seen 'em all.
This one was rather the opposite. At first glance it looks simple enough, but it was anything but. One of the five or so toughest projects I've come across.
Here's the technical story:
There are several stummel shape details that make creating a replacement stem for it (in this case a second, switchable stem) especially difficult.
One is when the shank is square or square-ish; another is when there are small radii involved; another is a mortise that is not centered; and still another is when the shank is neither parallel-sided nor tapered, but flared.
On the stem side of the equation the categorical killers are length---the longer a stem is, the harder it is to keep things straight---and if it is faceted. (Every variation of round, oval, and bladed are a walk in the park compared to cutting gemstone-like facets with straight edges. The reason is because "there is only one straight line" in geometry, and the slightest deviation from it can be seen by a 16 year old pug dog from thirty feet away.)
So, imagine my joy when someone wanted a replacement stem that required dealing with ALL those things. An extra-long faceted stem for a stummel that WASN'T STRAIGHT ANYWHERE. Compensating for the offset and dimensional inequalities to make everything LOOK straight in the end was the name of the game
Anyway, that's the background, here are the pics. The first shows the shape of the shank, the second shows how far off center things were---the stem was inserted upside down to illustrate, and the third shows the slight trumpeting of the shank (the side view isn't shown but it also flared). The next set of three show the sausage being made, and the last three show the final result.
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EDIT:
Since this is a teaching board, here are a couple instructional-type shots showing an easy way to keep everything straight when cutting faceted stems.
The first is a centered strip of 1/8" masking tape, and the second is after the edge gets too narrow for tape. Scuff the edge enough that it holds vulcanite dust, then use the resulting light-colored stripe as a guide:
.
This one was rather the opposite. At first glance it looks simple enough, but it was anything but. One of the five or so toughest projects I've come across.
Here's the technical story:
There are several stummel shape details that make creating a replacement stem for it (in this case a second, switchable stem) especially difficult.
One is when the shank is square or square-ish; another is when there are small radii involved; another is a mortise that is not centered; and still another is when the shank is neither parallel-sided nor tapered, but flared.
On the stem side of the equation the categorical killers are length---the longer a stem is, the harder it is to keep things straight---and if it is faceted. (Every variation of round, oval, and bladed are a walk in the park compared to cutting gemstone-like facets with straight edges. The reason is because "there is only one straight line" in geometry, and the slightest deviation from it can be seen by a 16 year old pug dog from thirty feet away.)
So, imagine my joy when someone wanted a replacement stem that required dealing with ALL those things. An extra-long faceted stem for a stummel that WASN'T STRAIGHT ANYWHERE. Compensating for the offset and dimensional inequalities to make everything LOOK straight in the end was the name of the game
Anyway, that's the background, here are the pics. The first shows the shape of the shank, the second shows how far off center things were---the stem was inserted upside down to illustrate, and the third shows the slight trumpeting of the shank (the side view isn't shown but it also flared). The next set of three show the sausage being made, and the last three show the final result.
-
-
-
---------------------
EDIT:
Since this is a teaching board, here are a couple instructional-type shots showing an easy way to keep everything straight when cutting faceted stems.
The first is a centered strip of 1/8" masking tape, and the second is after the edge gets too narrow for tape. Scuff the edge enough that it holds vulcanite dust, then use the resulting light-colored stripe as a guide:
.
Last edited by LatakiaLover on Sat Jan 21, 2017 5:09 am, edited 1 time in total.
UFOs must be real. There's no other explanation for cats.
Re: A perfect storm replacement stem
George, Beautiful work as usual. I have attempted to produce duplicate stems for simpler shapes and I know how difficult it is.
I think the mismatch in the second photo is inherent in that kind of shaping. I attempt to minimize it by rotating the stems 180 degrees while shaping, but have to stop at some point and actually finish the shape. They are never perfect.
I hope that your customer appreciates the technical difficulty of this work.
You are the master!!!!.
DocAitch
I think the mismatch in the second photo is inherent in that kind of shaping. I attempt to minimize it by rotating the stems 180 degrees while shaping, but have to stop at some point and actually finish the shape. They are never perfect.
I hope that your customer appreciates the technical difficulty of this work.
You are the master!!!!.
DocAitch
"Hettinger, if you stamp 'hand made' on a dog turd, some one will buy it."
-Charles Hollyday, pipe maker, reluctant mentor, and curmudgeon
" Never show an idiot an unfinished pipe!"- same guy
-Charles Hollyday, pipe maker, reluctant mentor, and curmudgeon
" Never show an idiot an unfinished pipe!"- same guy
Re: A perfect storm replacement stem
Nice one, George. The more I do stem replacements, the more I hate it. Respect.
Re: A perfect storm replacement stem
Then don't do stem replacements!Charl wrote:Nice one, George. The more I do stem replacements, the more I hate it. Respect.
I learnt years ago that it was a thankless task, how George puts up with it I don't know respect to him, he is a greater man than I.
Re: A perfect storm replacement stem
I saw that it was being referred to as a "bingdog" haha! Another name that could be considered is Bing's Best Friend. Great job as usual! When I was first looking at it I thought it was a bit strange being so long, but the Bing name helps.it make sense. I was also thinking that with the original stem it seemed a bit too short, but I struggle severely with stem lengths and how to make them proportionally comfortable. Do you have any pics of the original stem on the pipe? I am having a hard time visualizing what it looked like before the new stem was made.
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Re: A perfect storm replacement stem
.kamkiel wrote: Do you have any pics of the original stem on the pipe?
UFOs must be real. There's no other explanation for cats.
Re: A perfect storm replacement stem
Crazy.
"No reserves, no retreats, no regrets"
"When you're dumb...you've got to be tough." - my dad
"When you're dumb...you've got to be tough." - my dad
Re: A perfect storm replacement stem
A friend of mine saw this, George, and wrote to me "... that old buzzard's got skills, huh?"
ALL YOUR PIPE ARE BELONG TO US!
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Re: A perfect storm replacement stem
You have friends?! Did Hell freeze over???Sasquatch wrote:A friend of mine saw this, George, and wrote to me "... that old buzzard's got skills, huh?"
Am I Calamity Jane or Annie Oakley??...depends on the day.
www.ladybriar.com
www.ladybriar.com
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Re: A perfect storm replacement stem
Scottie --
"Friends" is Sasquatch-speak for the rows of souvenir skulls and bone-piles accumulating at the back of his cave. He has conversations with them. Really.
(The Canadisian government is OK with him snacking on campers and hikers because it qualifies as some sort of hands-off Endangered Cultural Thing.)
"Friends" is Sasquatch-speak for the rows of souvenir skulls and bone-piles accumulating at the back of his cave. He has conversations with them. Really.
(The Canadisian government is OK with him snacking on campers and hikers because it qualifies as some sort of hands-off Endangered Cultural Thing.)
UFOs must be real. There's no other explanation for cats.
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- Joined: Mon Jun 11, 2012 9:43 pm
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Re: A perfect storm replacement stem
Somehow that makes all the sense in the world
Am I Calamity Jane or Annie Oakley??...depends on the day.
www.ladybriar.com
www.ladybriar.com
Re: A perfect storm replacement stem
Sasquatch,
When I smoke my Christmas pipe, I've naively and happily been assuming you used a moose incisor or walrus tusk for a cutting tool, now I have a nauseating vision of you plucking a human tooth out of one of those skulls.
Please tell me it ain't so.
DocAitch
When I smoke my Christmas pipe, I've naively and happily been assuming you used a moose incisor or walrus tusk for a cutting tool, now I have a nauseating vision of you plucking a human tooth out of one of those skulls.
Please tell me it ain't so.
DocAitch
"Hettinger, if you stamp 'hand made' on a dog turd, some one will buy it."
-Charles Hollyday, pipe maker, reluctant mentor, and curmudgeon
" Never show an idiot an unfinished pipe!"- same guy
-Charles Hollyday, pipe maker, reluctant mentor, and curmudgeon
" Never show an idiot an unfinished pipe!"- same guy
Re: A perfect storm replacement stem
Hey, you choose the right tool for the right job. Don't be a pussy.
Pretty nice slot though, yeah???
Pretty nice slot though, yeah???
ALL YOUR PIPE ARE BELONG TO US!
Re: A perfect storm replacement stem
Nice slot, but I shudder to think how you did it. meeeoowww!
DAN
DAN
"Hettinger, if you stamp 'hand made' on a dog turd, some one will buy it."
-Charles Hollyday, pipe maker, reluctant mentor, and curmudgeon
" Never show an idiot an unfinished pipe!"- same guy
-Charles Hollyday, pipe maker, reluctant mentor, and curmudgeon
" Never show an idiot an unfinished pipe!"- same guy