Author Topic: Snaped a rod in my compressor  (Read 7046 times)

Offline Doc

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Snaped a rod in my compressor
« on: November 05, 2011, 12:07:01 AM »
Awhile back I was working in the shop and the compressor kicked in and boom made some really load snapping noise.
I pulled it apart and found it had snapped one of the rods first I thought ah crap there goes about 800+bucks to replace it.
Then I thought oh what the heck I have nothing to lose I'll attempt to make a replacement as I was told that there were no replacement parts to be had.


What I found when tearing it down.



I think there is a rod in there some where.







Made a piece to bolt on end as rod cap.




Remove rodcap pickup edge. Put cap back on and bore crank shaft hole.










First fit check to check the bore size feels ok good to continue.





Try to take some weight away.



It worked out really well its been in service for almost a year now.
George

Offline Powder Keg

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Re: Snaped a rod in my compressor
« Reply #1 on: November 05, 2011, 02:40:11 AM »
Great job on the fix!!! That reminds me... I should check the oil in mine.

~Wes~
Wesley P
A Gismo ??? If it has a flywheel or spins and is made with small parts. I'll take one! If it makes noise, moves, or requires frequent oiling and dusting it's a better deal yet. It's especially right if its shiny and bright; but if it's dirty and dull it wont mater at all...

Offline Stilldrillin

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Re: Snaped a rod in my compressor
« Reply #2 on: November 05, 2011, 03:12:46 AM »
That was a great, save project George!  :clap: :clap:

Very well done! Thanks for showing.....   :thumbup:

David D

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Bernd

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Re: Snaped a rod in my compressor
« Reply #3 on: November 05, 2011, 08:25:50 AM »
Isn't it great to have tools to fix your own machinery?  :headbang:

Excellent save George. Looks like you now have $800 to spend on some nice tooling, don't you think?  :ddb:

Bernd
You can't fix "STUPID".

Offline PTsideshow

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Re: Snaped a rod in my compressor
« Reply #4 on: November 05, 2011, 09:24:14 AM »
well now when some one asks why you have all thos tools you have something that they can understand! a really great job.
"The internet just a figment, of my imagination!' 
 
 There are only 3 things I can't do!"
Raise the Dead!
        Walk on water!
                 Fix a broken heart!
and I'm working on the first two!
glen

Offline Doc

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Re: Snaped a rod in my compressor
« Reply #5 on: November 05, 2011, 11:49:05 AM »
Thanks guys I think I may have spent the cash I saved there and maybe just a little more  :D
That repair was done just before I decided to purchase the CNC mill I have.

well now when some one asks why you have all thos tools you have something that they can understand! a really great job.
You know we look at thinks a little differently then people that are not involved with machining. I find myself after 35+ years in the tooling shop looking at something and having this nagging desire to figure out exactly how it was made. Is it just me or do all the machinists do that? :)


Thanks guys!
George

Offline PTsideshow

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Re: Snaped a rod in my compressor
« Reply #6 on: November 05, 2011, 12:05:00 PM »
Short answer is YES  :thumbup:  :clap: and when somebody asks why I do the repairs and other things MY standard answer for that last 40 years has been because "I CAN"  :thumbup:  :lol:  :lol:  :lol:  :lol:
"The internet just a figment, of my imagination!' 
 
 There are only 3 things I can't do!"
Raise the Dead!
        Walk on water!
                 Fix a broken heart!
and I'm working on the first two!
glen

Offline doubleboost

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Re: Snaped a rod in my compressor
« Reply #7 on: November 05, 2011, 02:44:40 PM »
Hi
George
That was a great repair :thumbup: :thumbup: :thumbup:
Nicely shown as well
John

Offline Bernd

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Re: Snaped a rod in my compressor
« Reply #8 on: November 06, 2011, 08:18:46 AM »
I find myself after 35+ years in the tooling shop looking at something and having this nagging desire to figure out exactly how it was made. Is it just me or do all the machinists do that? :)


Thanks guys!

Nope, same here.

Bernd
You can't fix "STUPID".

Offline Henning

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Re: Snaped a rod in my compressor
« Reply #9 on: November 10, 2011, 05:17:33 AM »
Great save!  :thumbup: And the feeling of fixing it yourself! Priceless!

You know we look at thinks a little differently then people that are not involved with machining. I find myself after 35+ years in the tooling shop looking at something and having this nagging desire to figure out exactly how it was made. Is it just me or do all the machinists do that? :)

That has brought me into trouble more times than one... from the age of 1 according to my mother.
I am getting better at getting things back togheter after figuring out how they work, though, so it may be it pays off in the end. (I hope, i sincerely hop  :bugeye: )
Henning

Just because i can't, doesn't mean i shouldn't?
Tool- lover, with a collection to show for it!

Offline AndyB

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Re: Snaped a rod in my compressor
« Reply #10 on: November 10, 2011, 03:21:33 PM »
My sister used to laugh at me for 'playing with her kids' toys'. :lol:

I am fascinated by stupidly simple tricks, toys and gimmicks. My neice had a pull-cord frog that 'muttered' a fly on a string all the way back into its mouth while paddling its feet. I know it was clockwork but I loved the simplicity of it. :smart:

I have to know how things work. It amuses everyone until something breaks and then who do you think they ask to fix it? :doh:

My wife watches me machine a whole lot of stuff up...then is surprised when I repair something that she was going to throw away :doh:

Andy
Waveney Valley, Suffolk/Norfolk Border

Offline ETC57

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Re: Snaped a rod in my compressor
« Reply #11 on: February 15, 2012, 04:34:41 PM »
Great save George!

 I find I get frustrated when I don't have what I need to fix something,  that's when the cogitating starts. :scratch:

 There's always more then one way to skin a cat!!!  :dremel:

  Jerry. :beer:

Offline Doc

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Re: Snaped a rod in my compressor
« Reply #12 on: February 15, 2012, 05:27:34 PM »
Thanks AndyB
It is still going strong (knock on wood) its been over a year and many cycles.
It has always been a good compressor except for the broken rod :)
George

Offline MadNick

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Re: Snaped a rod in my compressor
« Reply #13 on: February 26, 2012, 03:46:05 AM »
"The con rod broke so I made a new one" - now that is impressive!

Like you, since childhood years, always fascinated with machines and mechanical things and had electric motors, clocks and watches in pieces, built my own bicycles and then moved onto motorbikes but have never been that interested in cars, funnily enough.

Nick

Offline Doc

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Re: Snaped a rod in my compressor
« Reply #14 on: March 09, 2016, 09:55:31 PM »
Well 5 years later and the compressor still going strong with no hic-ups. When I made it I was just hoping for another year out of it.
George

Offline PekkaNF

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Re: Snaped a rod in my compressor
« Reply #15 on: March 10, 2016, 12:51:36 AM »
How did you fix it?

Pictures are gone.

I find mysef too thinkking how something was made. How it was calmpped and did they uses fixtures?

Pekka

Offline sparky961

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Re: Snaped a rod in my compressor
« Reply #16 on: March 10, 2016, 05:36:13 PM »
How did you fix it?

Pictures are gone.

I find mysef too thinkking how something was made. How it was calmpped and did they uses fixtures?

Pekka

My thoughts too.  I likely missed this the first time around and was disappointed not to see the steps.  Its certainly nice to look at something you've applied a "temporary fix" to .... years into the future ... and smile to yourself.

Offline Doc

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Re: Snaped a rod in my compressor
« Reply #17 on: March 10, 2016, 07:32:19 PM »
How did you fix it?

Pictures are gone.

I find mysef too thinkking how something was made. How it was calmpped and did they uses fixtures?

Pekka

Sorry I messed it up when I changed the album name. They should be back I went and changed it back. Sorry!
George

Offline PekkaNF

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Re: Snaped a rod in my compressor
« Reply #18 on: March 11, 2016, 01:21:07 AM »
Thanks, That was a nice work.

Now I know how to use "chair", just over picture caption "Remove rodcap pickup edge. Put cap back on and bore crank shaft hole.".

Pekka

Offline awemawson

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Re: Snaped a rod in my compressor
« Reply #19 on: March 11, 2016, 03:07:57 AM »
George, do you have any idea why it snapped? It seems an odd failure mode if nothing else was damaged. No sign of the main bearing or piston seizing?
« Last Edit: March 11, 2016, 05:44:21 PM by awemawson »
Andrew Mawson
East Sussex

Offline vintageandclassicrepairs

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Re: Snaped a rod in my compressor
« Reply #20 on: March 11, 2016, 05:41:15 PM »
HI All,
Nice Job :clap:
My thought on the failure is that theres a fairly sharp corner where the rod and big end meet
Usual conrod design is to have a large radius there??

John

Offline Doc

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Re: Snaped a rod in my compressor
« Reply #21 on: March 11, 2016, 07:14:44 PM »
George, do you have any idea why it snapped? It seems an odd failure mode if nothing else was damaged. No sign of the main bearing or piston seizing?

I am not sure why it failed I'm thinking it had a crack and it just kept growing until it failed. When it failed it had been running quite a bit that day. It was not low on oil and the journal area was not scared up so who knows why?
George

Offline krv3000

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Re: Snaped a rod in my compressor
« Reply #22 on: March 12, 2016, 04:37:30 PM »
brill job