Why do I keep breaking shanks?
Why do I keep breaking shanks?
I have turned three pipes on the lathe - they never got finished because I keep breaking the shanks!
One of them was a catch - which is fine and dandy and understandable; my mistake. The other two however, were from test fitting stems...I am not jamming them in there. They were snug fits at best and the shanks just split. Happened twice on one of them.
So I have three pipes with half inch long shanks and I don't know what to do with them - the drilling is perfect and bowl shape is fine so far. The most recent one I am trying to do a shank extension out of acrylic followed by a cumberland stem. Is shank extensions the only answer as to what I can do with these failures?
Does anyone know what is going on? Shank walls just too thin - the most recent one was a 3/8 mortise in 1/2 hole. Should I have used a 1/4 mortise on that one?
Thanks,
Cory
One of them was a catch - which is fine and dandy and understandable; my mistake. The other two however, were from test fitting stems...I am not jamming them in there. They were snug fits at best and the shanks just split. Happened twice on one of them.
So I have three pipes with half inch long shanks and I don't know what to do with them - the drilling is perfect and bowl shape is fine so far. The most recent one I am trying to do a shank extension out of acrylic followed by a cumberland stem. Is shank extensions the only answer as to what I can do with these failures?
Does anyone know what is going on? Shank walls just too thin - the most recent one was a 3/8 mortise in 1/2 hole. Should I have used a 1/4 mortise on that one?
Thanks,
Cory
The way to make people want to smoke your pipes is to develop a reputation for excellence in your work. This takes a lot of hard work and several years to accomplish, and there are no short cuts. You just have to keep at it. - Rad Davis
Re: Why do I keep breaking shanks?
If you're talking about a 3/8 mortise in a half inch shank, that could be a little thin and need great care in fitting a stem. You're only leaving 1/16 around the outside if I'm understanding what you're saying.
Rad
Rad
Re: Why do I keep breaking shanks?
That is correct. What is a safe wall thickness on the shank?RadDavis wrote:If you're talking about a 3/8 mortise in a half inch shank, that could be a little thin and need great care in fitting a stem. You're only leaving 1/16 around the outside if I'm understanding what you're saying.
Rad
The way to make people want to smoke your pipes is to develop a reputation for excellence in your work. This takes a lot of hard work and several years to accomplish, and there are no short cuts. You just have to keep at it. - Rad Davis
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Re: Why do I keep breaking shanks?
There is probably not a good reason to do a 3/8" tenon for the pipes you describe. That is unnecessarily large. 5/16" would be fine (and standard) for a 1/2" shank, and 1/4" would be a good choice if it was a Delrin tenon.
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Re: Why do I keep breaking shanks?
Does sound like thin walls to me. SInce I use delrin for my tenons then they are all the same size except on unusual designs. 6mm tenons let me comfortably go down to a 10-11mm shank regularly.
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Re: Why do I keep breaking shanks?
Chris... please speak American, mm are foreign here.
Re: Why do I keep breaking shanks?
Sorry unlike software I am not back compatible, I only deal in up to date measurements.The Smoking Yeti wrote:Chris... please speak American, mm are foreign here.
Re: Why do I keep breaking shanks?
caskwith wrote:Sorry unlike software I am not back compatible, I only deal in up to date measurements.The Smoking Yeti wrote:Chris... please speak American, mm are foreign here.
Why do I keep breaking shanks?
Hey, wait...Chris, don't you guys still refer to weight in stones? : )
Re: Why do I keep breaking shanks?
Yes up to date measurements and yes stone is also up to date here here
"I never knew how empty was my soul untill it was filled" Arthur
http://www.clarkpipes.com
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Re: Why do I keep breaking shanks?
At least they use Newtons instead of slugs...what a lame unit of measurement...
I am all for the metric system.
I am all for the metric system.
The way to make people want to smoke your pipes is to develop a reputation for excellence in your work. This takes a lot of hard work and several years to accomplish, and there are no short cuts. You just have to keep at it. - Rad Davis
Re: Why do I keep breaking shanks?
If you have to push any harder than .237 Erg it's too tight.
ALL YOUR PIPE ARE BELONG TO US!
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Re: Why do I keep breaking shanks?
I'll wager two shekels of silver that Sas is drunk.