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How to remove/fix this threaded spigot?
I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he
https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. |
How to remove/fix this threaded spigot?
Kal Ico wrote in
: I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor |
How to remove/fix this threaded spigot?
On 04/02/2021 16:56, JohnP wrote:
Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 -- "Strange as it seems, no amount of learning can cure stupidity, and higher education positively fortifies it." - Stephen Vizinczey |
How to remove/fix this threaded spigot?
On 04/02/2021 18:58, The Natural Philosopher wrote:
On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of penetrating oil. The very last thing you want to do is apply so much torque that you damage the boss or the threads. Remember that a stud extractor tends to expand the male part, making it tighter. |
How to remove/fix this threaded spigot?
On 04/02/2021 16:56, JohnP wrote:
Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor Sadly stud extractors don't come with a maximum torque setting and I have heard so many stories in broken extractors. In short unless the item comes out with a minimal torque I wouldn't push my luck. If the above fails or you don't have an extractor, being brass I would drill this out, there's even a nice pilot hole for you. With a correctly sized drill I've generally been able to pick the bits of thread out, even in steel and then run a tap to clear the thread. Most tanks have a drain, so you may be able to remove the fragments that fall into the tank through that? |
How to remove/fix this threaded spigot?
On 04/02/2021 20:29, newshound wrote:
On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of penetrating oil. The very last thing you want to do is apply so much torque that you damage the boss or the threads. Remember that a stud extractor tends to expand the male part, making it tighter. I have used a punch or something similar to wind out a bolt. It may loosen the thread sufficiently for a stud extractor to work. |
How to remove/fix this threaded spigot?
Kal Ico wrote I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out An extractor should get it out. and suggest how to repair/re-thread so I can use it again? A tap should repair it fine. |
How to remove/fix this threaded spigot?
"newshound" wrote in message o.uk... On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of penetrating oil. That won't work if goo has been used. Heat might help. The very last thing you want to do is apply so much torque that you damage the boss or the threads. But the boss can be held with a vice grip. Remember that a stud extractor tends to expand the male part, making it tighter. But its the only way to get a decent grip on what needs to be removed now. |
How to remove/fix this threaded spigot?
In message , Fredxx
writes On 04/02/2021 20:29, newshound wrote: On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of penetrating oil. The very last thing you want to do is apply so much torque that you damage the boss or the threads. Remember that a stud extractor tends to expand the male part, making it tighter. I have used a punch or something similar to wind out a bolt. It may loosen the thread sufficiently for a stud extractor to work. Would it benefit from local heating prior to further rotational force? There may have been thread sealant used which can sometimes be softened by heat. -- Tim Lamb |
Lonely Obnoxious Cantankerous Auto-contradicting Senile Ozzie Troll Alert!
On Fri, 5 Feb 2021 14:36:10 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again: Kal Ico wrote I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out An extractor should get it out. Someone said that already LONG before you, sociopath! Just what in hell makes you believe that ANYONE's answer will only be valid when YOU confirm it, you obnoxious sociopathic senile pest? Your sociopathy? -- Bod addressing abnormal senile quarreller Rot: "Do you practice arguing with yourself in an empty room?" MID: |
How to remove/fix this threaded spigot?
On 04/02/2021 16:35, Kal Ico wrote:
I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. It's brass which will solder well. Clean up the inside as best you can and solder a suitable brass thing in - maybe a brass bolt or just some brass rod. Use flux and a small blowtorch. There should be plenty of area to make a strong enough joint, and the heat may well help too. -- Cheers Clive |
How to remove/fix this threaded spigot?
"Rod Speed" wrote in news:i83spiFg3c9U1
@mid.individual.net: Kal Ico wrote I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out An extractor should get it out. and suggest how to repair/re-thread so I can use it again? A tap should repair it fine. An extractor will not damage the thread - you would put the extractor into the hole and wind out the broken stub. |
How to remove/fix this threaded spigot?
Clive Arthur wrote in news:rvj5fg$gbt$1@dont-
email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. |
How to remove/fix this threaded spigot?
JohnP wrote:
Clive Arthur wrote in news:rvj5fg$gbt$1@dont- email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. The fact that it sheared off suggests to me that it might be tight! As a stud extractor will try to expand the stub during removal it might not be the best tool. Id try one first probably but I suspect itll need careful drilling and then cleaning up the threads with a tap. Tim -- Please don't feed the trolls |
How to remove/fix this threaded spigot?
Tim+ wrote in
: JohnP wrote: Clive Arthur wrote in news:rvj5fg$gbt$1@dont- email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. The fact that it sheared off suggests to me that it might be tight! As a stud extractor will try to expand the stub during removal it might not be the best tool. Id try one first probably but I suspect itll need careful drilling and then cleaning up the threads with a tap. Tim Depends - was it a tapered thread - or did the fitting have a shoulder? |
How to remove/fix this threaded spigot?
On 04/02/2021 21:45, Fredxx wrote:
On 04/02/2021 20:29, newshound wrote: On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of penetrating oil. The very last thing you want to do is apply so much torque that you damage the boss or the threads. Remember that a stud extractor tends to expand the male part, making it tighter. I have used a punch or something similar to wind out a bolt. It may loosen the thread sufficiently for a stud extractor to work. A good method for a nut or bolt head, might be worth a try if there is enough metal to get at. You need the right sort of punch. Mine isn't round, it has four tapering "sides" like a very elongated pyramid, and then at the end a "flat"at an angle of about 30 degrees to the axis, oriented diagonally so that there is one "point" that digs in and provides the driving force without tending to slip laterally. |
How to remove/fix this threaded spigot?
On 05/02/2021 03:48, Rod Speed wrote:
Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of penetrating oil. That won't work if goo has been used. Well it does depend on the "goo", I was thinking of the soft stuff used for sealing automotive seams before painting, this might well be softened by hydrocarbons. Heat might help. Agreed. That will work on "hard" or "soft" sealants. |
How to remove/fix this threaded spigot?
JohnP wrote:
Tim+ wrote in : JohnP wrote: Clive Arthur wrote in news:rvj5fg$gbt$1@dont- email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. The fact that it sheared off suggests to me that it might be tight! As a stud extractor will try to expand the stub during removal it might not be the best tool. Id try one first probably but I suspect itll need careful drilling and then cleaning up the threads with a tap. Tim Depends - was it a tapered thread Unlikely given that it looks like a nut welded to the air reservoir. Tim -- Please don't feed the trolls |
How to remove/fix this threaded spigot?
On 05/02/2021 09:37, Tim Lamb wrote:
In message , Fredxx writes On 04/02/2021 20:29, newshound wrote: On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of* penetrating oil. The very last thing you want to do is apply so much* torque that you damage the boss or the threads. Remember that a stud* extractor tends to expand the male part, making it tighter. I have used a punch or something similar to wind out a bolt. It may loosen the thread sufficiently for a stud extractor to work. Would it benefit from local heating prior to further rotational force? There may have been thread sealant used which can sometimes be softened by heat. Softened maybe. I have had the experience of heating up threaded parts where I carbonises the grease/organic matter between the threads. The movement I initially had disappeared and have since wondered if there was some reaction incorporating the carbon into the steel parts. Where you have dissimilar metals there is always the thought that differential expansion can help. Brass has a thermal expansion coefficient nominally twice that of steel. After tentative easing with a stud extractor I would drill this out very carefully. Worst case scenario if the threads are seriously damaged is a helicoil. |
How to remove/fix this threaded spigot?
On 5 Feb 2021 at 21:33:50 GMT, "Tim+" wrote:
JohnP wrote: Tim+ wrote in : JohnP wrote: Clive Arthur wrote in news:rvj5fg$gbt$1@dont- email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. The fact that it sheared off suggests to me that it might be tight! As a stud extractor will try to expand the stub during removal it might not be the best tool. Id try one first probably but I suspect itll need careful drilling and then cleaning up the threads with a tap. Tim Depends - was it a tapered thread Unlikely given that it looks like a nut welded to the air reservoir. Tim Do we know if it was broken off by an accidental sideways force, in which case it might not be particularly tight apart from thread sealant? If it sheared off trying to undo it a stud extractor is likely likely to damage it by making it tighter and distorted, or shear of the whole ad hoc boss. -- Roger Hayter |
How to remove/fix this threaded spigot?
Roger Hayter wrote:
On 5 Feb 2021 at 21:33:50 GMT, "Tim+" wrote: JohnP wrote: Tim+ wrote in : JohnP wrote: Clive Arthur wrote in news:rvj5fg$gbt$1@dont- email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. The fact that it sheared off suggests to me that it might be tight! As a stud extractor will try to expand the stub during removal it might not be the best tool. Id try one first probably but I suspect itll need careful drilling and then cleaning up the threads with a tap. Tim Depends - was it a tapered thread Unlikely given that it looks like a nut welded to the air reservoir. Tim Do we know if it was broken off by an accidental sideways force, in which case it might not be particularly tight apart from thread sealant? If it was sideways force I would describe that as snapped off. To me, sheared off suggests breakage during attempted rotation. If it sheared off trying to undo it a stud extractor is likely likely to damage it by making it tighter and distorted, or shear of the whole ad hoc boss. Well I think were agreeing. Tim -- Please don't feed the trolls |
How to remove/fix this threaded spigot?
Depends - was it a tapered thread Unlikely given that it looks like a nut welded to the air reservoir. Tim /The bit that needs removing is screwed into that. |
How to remove/fix this threaded spigot?
"JohnP" wrote in message . .. "Rod Speed" wrote in news:i83spiFg3c9U1 @mid.individual.net: Kal Ico wrote I have a small air compressor and one of the fittings to the air tank has sheared off. You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out An extractor should get it out. and suggest how to repair/re-thread so I can use it again? A tap should repair it fine. An extractor will not damage the thread That depends on whether so much force needs to be exerted on the stub that the extractor expands the stub and that damages the thread. - you would put the extractor into the hole and wind out the broken stub. Its not always that black and white when goo has been used on the thread. |
How to remove/fix this threaded spigot?
"JohnP" wrote in message . .. Clive Arthur wrote in news:rvj5fg$gbt$1@dont- email.me: https://photos.app.goo.gl/xAaN8W I would suggest it will not be very tight as their is no shoulder for it to have been tighted onto. But the goo may well have set now and be tight for that reason. |
How to remove/fix this threaded spigot?
On 05/02/2021 21:48, Fredxx wrote:
On 05/02/2021 09:37, Tim Lamb wrote: In message , Fredxx writes On 04/02/2021 20:29, newshound wrote: On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of* penetrating oil. The very last thing you want to do is apply so much* torque that you damage the boss or the threads. Remember that a stud* extractor tends to expand the male part, making it tighter. I have used a punch or something similar to wind out a bolt. It may loosen the thread sufficiently for a stud extractor to work. Would it benefit from local heating prior to further rotational force? There may have been thread sealant used which can sometimes be softened by heat. Softened maybe. I have had the experience of heating up threaded parts where I carbonises the grease/organic matter between the threads. The movement I initially had disappeared and have since wondered if there was some reaction incorporating the carbon into the steel parts. Where you have dissimilar metals there is always the thought that differential expansion can help. Brass has a thermal expansion coefficient nominally twice that of steel. And the brass bit seems to be inside the welded steel boss, so maybe rapid cooling first to shrink the broken bit, and then try the stud extractor. A CO2 fire extinguisher might be able to provide some rapid cooling, since that seems to be how rapid wine coolers work. |
How to remove/fix this threaded spigot?
In message , Andrew
writes On 05/02/2021 21:48, Fredxx wrote: On 05/02/2021 09:37, Tim Lamb wrote: In message , Fredxx writes On 04/02/2021 20:29, newshound wrote: On 04/02/2021 18:58, The Natural Philosopher wrote: On 04/02/2021 16:56, JohnP wrote: Kal Ico wrote in : I have a small air compressor and one of the fittings to the air tank has sheared off.* You can see it he https://photos.app.goo.gl/w44v8jSG2noBKVHv5 https://photos.app.goo.gl/xAaN8WTswVh6wuCQ6 Can anyone recommend the best way to get the old bit out and suggest how to repair/re-thread so I can use it again? Thans. Stud Extractor +1 Is that some sort of goo providing an additional seal? Is it hard or soft? Either way, I think I would attack it gently with a wood-working chisel to try to chip or prise as much away from the interface as possible, as it will be contributing to the removal torque. Ideally I'd try to make the thread interface visible, and soak it with some sort of* penetrating oil. The very last thing you want to do is apply so much* torque that you damage the boss or the extractor tends to expand the male part, making it tighter. I have used a punch or something similar to wind out a bolt. It may loosen the thread sufficiently for a stud extractor to work. Would it benefit from local heating prior to further rotational force? There may have been thread sealant used which can sometimes be softened by heat. Softened maybe. I have had the experience of heating up threaded parts where I carbonises the grease/organic matter between the threads. The movement I initially had disappeared and have since wondered if there was some reaction incorporating the carbon into the steel parts. Where you have dissimilar metals there is always the thought that differential expansion can help. Brass has a thermal expansion coefficient nominally twice that of steel. And the brass bit seems to be inside the welded steel boss, so maybe rapid cooling first to shrink the broken bit, and then try the stud extractor. A CO2 fire extinguisher might be able to provide some rapid cooling, since that seems to be how rapid wine coolers work. The photo appears to show evidence of thread sealant. The only thing I have found to help is localised heating. If a suitable square section bar was to hand (1/2" socket drive?) you could carefully file 4 matching grooves in the bore. -- Tim Lamb |
How to remove/fix this threaded spigot?
Thanks everyone for your great bits of advice. I'll tackle it at the weekend and let you know how I get on. All the best.
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