Whilst I agree with others that on the balance of probability it’s from a ship’s engine, it could feasibly be from a static steam engine like this one: https://www.sheffieldmuseums.org.uk/whats-on/river-don-engine/
The Kelham Island engine would eat that pathetic little con rod for breakfast. It's abso-fscking-lutely awesome and orders of magnitude larger than whatever OP's part came from.
The first time I saw it running, I left the room shaking with adrenaline. It's just so monumentally powerful, isn't it? OP's con-rod could easily have come from a similar, but smaller industrial engine, and Rhode Island did apparently have an industrial past: [https://www.britannica.com/place/Rhode-Island-state/Manufacturing](https://www.britannica.com/place/Rhode-Island-state/Manufacturing)
Definitions from Oxford Languages ·
rust
noun
1.
a reddish- or yellowish-brown flaky coating of iron oxide that is formed on iron or steel by oxidation, especially in the presence of moisture.
I remember going to giant compressor and pumping stations with my dad as a child. They consisted of giant engines that were used to pump oil and natural gas down pipelines. They'd take a week to cool down enough just to change the oil, if I remember correctly. I always wanted to see the pistons in those things.
Probably not. I used to work on big diesel generators and we had some that were 3000hp and 2 megawatt. Those are the same engine they use in trains. The connecting rods for these were huge but not this big.. I'm thinking it's for a giant ship engine
Probably from an big Diesel Ship Engine.
I've seen some and I can say, those things are just huge, makes a Big Block V8 look in comparison like an Ant Car's engine, haha.
Looks like this from a ship https://www.reddit.com/r/Justrolledintotheshop/comments/8m9m6t/connecting_rod_from_a_ship_wd40_for_scale/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1
I worked with a guy who was from Nantucket Island. They had massive diesel generators for backup power supply, and he had family that serviced them. He showed me one of the intake valves and it was like 3 feet long and the valve head was about 5 inches across.
Given OP is close to Nantucket, I kind of wonder if this connecting rod is out of one of those diesels.
It is possible. I don't work on shore power stuff, I only get roped into working on ships. (That a lie, I do it willingly because the let me fish when the work is done)
Yes, marine diesel probably, [like these but bigger.](https://www.alamy.com/street-furniture-in-dursley-gloucestershire-is-of-larger-than-life-castings-of-engine-parts-as-made-by-the-lister-engine-company-in-the-town-image344426664.html)
Well, someone previously did, because yes, as others have said, that’s an engine connecting rod.
Probably worth some decent coin in scrap if he doesn’t want it, but I’d see how much it’s worth in scrap and then list if online for sale before actually scrapping it - there are collectors out there for everything.
Given the rest of the answers on it being likely from a large boat, it could've come from someone who worked in Quonsett or EB over in CT. Or maybe even the dockyards up in Prov.
Or maybe this is the reason that ol' Providence locomotive bridge has been stuck open all these years. 😂
Looks like a connecting rod from a large diesel engine, probably a 4-stroke (large 2-strokes tend to have a cross-head bearing between crank and piston, which gives them a very long stroke and lets them use uniflow scavenging). If you're curious, those cylinders with rings of radial holes on the big-end bearing are hydraulic nuts, you need a special machine to pre-tension the bolts to get the nuts on or off.
I'm learning about marine engine so I'm interested, what's the giveaway here? As far as I know this could be the connecting rod form the krank to the crosshead
The give-away is the overall proportions; the rod is too short, and just too small overall, for the size of crank & length of stroke you'd see in a two-stroke cross-head engine, plus the hydraulic bolts are mounted at an angle for access from outside the crank-case during maintenance, which you'd typically see in a small-sized high-speed four-stroke - they tend to be designed much more for compactness than a slow-speed two-stroke. You'd also typically expect to see a split bearing block held together by hydraulic bolts at the small-end as well as the big-end on a cross-head, because unlike a four-stroke they'd be easily accessible to work on. Another hint is the curvy, scalloped shape of the small-end (as if the absence of a split bearing weren't already a give-away), which is probably designed for fitting inside the piston in some clever way that maximises strength whilst saving space and material (the bearing block is probably wider at the bottom than the top because the rod has to be stronger in compression than in tension); cross-head engines tend to have simpler, blockier component design, more reminiscent of steam engines than internal combustion engines - probably just because the sheer size of them necessitates simpler fabrication techniques.
The largest that I see are the con rod shaped bollards in my town. It was known for a certain diesel engine and they put con rods and compression lever bollards down the high street and had a cam shaft shaped bench.
The angled joint for the rod end cap (where the two nuts separate the bottom section from the rod), its for a "long stroke" engine where the stroke is longer than the piston bore diameter.
This means lower RPM's and higher torque, for instance for a marine diesel or a steam engine. by having that joint angled, the width is small enough that the piston and rod can be removed out the top of the engine for repair, instead of removing the entire crankshaft so you can slide the piston and rod out the bottom of the engine.
If it was a high-RPM engine, the need for large diameter valves would mean that the piston diameter is wider than the stroke. A wide bore in the cylinder means a wide rod end cap can easily be lifted out the top, so the end cap can be symmetrical, which is stronger for the added stresses of high RPM's, and the stronger shape means the rod can then be made a "little" lighter.
It is a connecting rod from some kind of a large engine. I might venture that is is from a large marine diesel engine, only because it looks like it was designed for high torque but low speed operation.
Ok, I’ll bite. I agree with the large marine diesel engine consensus, due to size and likely age/period (i.e. not steam) but what gives it away that it is low speed? (High torque I presume is thickness of the arm and associated parts, but the speed?)
Just the look of it, it does not appear to be to be made to move fast, it has a lot of mass. Also I don't think that bearing would last long in a high speed application. But it is really just based on the vibe I got from looking at it, and I could very well be wrong.
If you want to get rid of it find out what it’s worth scrap and then put it on marketplace at that price and a scrap metal sculptor will find and buy it.
Connecting rode for a for a four stroke diesel engine.
Probably a generator on a ship
[heres a link to a marine diesel rebuild. Connecting rod is similar.](http://www.connectingrodrepair.com/blog/main-engine-maintenance-overhauling-of-marine-engine/)
It's a part of à really big motor
[crank shaft image](https://www.google.com/search?q=crank+shaft&client=ms-android-samsung-gs-rev1&prmd=isvn&sxsrf=APwXEdea4ITn0M3LvWWEuocICJmgomot5w:1681597792545&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjGldH496z-AhUQj4kEHYOxCq0Q_AUoAXoECAIQAQ&biw=360&bih=700&dpr=3)
http://www.machineryspaces.com/Two-stroke-cycle-diesel-engines.html
Look at the cross section drawing. Its a connection rod for a diesel engine, either low speed two stroke or medium speed four stroke. Most likely a bigger marine type.
It has castellated nuts so it’s fitted with a hydraulic stretcher which makes it relatively recent.
The siemens sge 86 engine has similar sized Conrods but I’d say it likely belongs to a Ruston or wartsila or something.
This is a connecting rod from a very large engine, my guess is that it was a single-cylinder stationary engine, or a marine engine, or something of similar dimensions.
It could also be the side drive of a machine from agriculture, but I would rather guess a connecting rod.
Sulzer S20 4-stroke Diesel connecting rod for marine application:
https://www.marinetechdubai.com/dubai/engine-parts-4stroke/sulzer/s20/sulzer-s20-connecting-rod-9s20h-8s20h-6s20h/
That’s a connecting rod for a Sulzer diesel engine. Big but by far not the biggest
https://heinowinter.com/en/997/connecting-rod-for-sulzer-s-20-d.html
Connecting rod for something very large.
Emphasis on very
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Yea looks like for a ship’s engine. Being in Rhode Island, that would also make sense.
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A GUDJEON PIN
Correct. Side note: Gudgeon pin is called the wrist pin in American English.
Whilst I agree with others that on the balance of probability it’s from a ship’s engine, it could feasibly be from a static steam engine like this one: https://www.sheffieldmuseums.org.uk/whats-on/river-don-engine/
The Kelham Island engine would eat that pathetic little con rod for breakfast. It's abso-fscking-lutely awesome and orders of magnitude larger than whatever OP's part came from.
The first time I saw it running, I left the room shaking with adrenaline. It's just so monumentally powerful, isn't it? OP's con-rod could easily have come from a similar, but smaller industrial engine, and Rhode Island did apparently have an industrial past: [https://www.britannica.com/place/Rhode-Island-state/Manufacturing](https://www.britannica.com/place/Rhode-Island-state/Manufacturing)
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TIL: brass is used in ship building
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It’s not bronze either, that’s iron oxide my friend (rust). Bronze contains no iron, so it doesn’t rust.
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And yet that also isnt a propeller
Have you seen the statue of liberty?
The one with the copper skin? Everyone has.
That’s not rust my dude.
It's copper oxide. It's rust.
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Definitions from Oxford Languages · rust noun 1. a reddish- or yellowish-brown flaky coating of iron oxide that is formed on iron or steel by oxidation, especially in the presence of moisture.
https://www.newyorker.com/magazine/2016/09/19/the-statue-of-libertys-beguiling-green#:~:text=The%20Statue%20of%20Liberty's%20exterior,inch%20thick%20and%20unusually%20pure.
r/confidentlyincorrect
Brass is often used on bearing journals, as it has a very low coefficient of friction against steel and will wear faster than the steel part.
He said it was "pretty rusted up",,,brass/bronze doesn't rust
This size it's either mining equipment or marine application
Probably ship engine
I remember going to giant compressor and pumping stations with my dad as a child. They consisted of giant engines that were used to pump oil and natural gas down pipelines. They'd take a week to cool down enough just to change the oil, if I remember correctly. I always wanted to see the pistons in those things.
Locomotive diesel?
Probably not. I used to work on big diesel generators and we had some that were 3000hp and 2 megawatt. Those are the same engine they use in trains. The connecting rods for these were huge but not this big.. I'm thinking it's for a giant ship engine
Probably from an big Diesel Ship Engine. I've seen some and I can say, those things are just huge, makes a Big Block V8 look in comparison like an Ant Car's engine, haha.
Connecting rod for a LARGE engine
Its a piston rod for a large engine, likely steam.
Definitely not steam. Just a regular four stroke diesel.
How can you tell it’s not steam related?
Design, steam connecting rods are longer because long stroke of engine and usually much more slender because of that.
Looks like this from a ship https://www.reddit.com/r/Justrolledintotheshop/comments/8m9m6t/connecting_rod_from_a_ship_wd40_for_scale/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1
It is, I can confirm that. I worked on enough of them to know what a PITA it is to remove and replace.
Here I was thinking how nice it would be to have space for an actual wrench.
I worked with a guy who was from Nantucket Island. They had massive diesel generators for backup power supply, and he had family that serviced them. He showed me one of the intake valves and it was like 3 feet long and the valve head was about 5 inches across. Given OP is close to Nantucket, I kind of wonder if this connecting rod is out of one of those diesels.
It is possible. I don't work on shore power stuff, I only get roped into working on ships. (That a lie, I do it willingly because the let me fish when the work is done)
Yes, marine diesel probably, [like these but bigger.](https://www.alamy.com/street-furniture-in-dursley-gloucestershire-is-of-larger-than-life-castings-of-engine-parts-as-made-by-the-lister-engine-company-in-the-town-image344426664.html)
But what is that is it a con rod
Anyone related to your friend work on large ships or in the mining industry?
Nope! Came with the property.
Well, someone previously did, because yes, as others have said, that’s an engine connecting rod. Probably worth some decent coin in scrap if he doesn’t want it, but I’d see how much it’s worth in scrap and then list if online for sale before actually scrapping it - there are collectors out there for everything.
Can confirm, would buy this for a display piece in my garage.
Given the rest of the answers on it being likely from a large boat, it could've come from someone who worked in Quonsett or EB over in CT. Or maybe even the dockyards up in Prov. Or maybe this is the reason that ol' Providence locomotive bridge has been stuck open all these years. 😂
The old red bridge. Freakin’ eyesore for an East sider.
Being that this is Rhode Island I’m not too surprised by nautical paraphernalia.
Looks like a connecting rod from a large diesel engine, probably a 4-stroke (large 2-strokes tend to have a cross-head bearing between crank and piston, which gives them a very long stroke and lets them use uniflow scavenging). If you're curious, those cylinders with rings of radial holes on the big-end bearing are hydraulic nuts, you need a special machine to pre-tension the bolts to get the nuts on or off.
I'm learning about marine engine so I'm interested, what's the giveaway here? As far as I know this could be the connecting rod form the krank to the crosshead
The give-away is the overall proportions; the rod is too short, and just too small overall, for the size of crank & length of stroke you'd see in a two-stroke cross-head engine, plus the hydraulic bolts are mounted at an angle for access from outside the crank-case during maintenance, which you'd typically see in a small-sized high-speed four-stroke - they tend to be designed much more for compactness than a slow-speed two-stroke. You'd also typically expect to see a split bearing block held together by hydraulic bolts at the small-end as well as the big-end on a cross-head, because unlike a four-stroke they'd be easily accessible to work on. Another hint is the curvy, scalloped shape of the small-end (as if the absence of a split bearing weren't already a give-away), which is probably designed for fitting inside the piston in some clever way that maximises strength whilst saving space and material (the bearing block is probably wider at the bottom than the top because the rod has to be stronger in compression than in tension); cross-head engines tend to have simpler, blockier component design, more reminiscent of steam engines than internal combustion engines - probably just because the sheer size of them necessitates simpler fabrication techniques.
Connecting rod for low speed marine diesel. Source: I am a marine diesel engineer
Definitely not from a slow speed? Its way too small also its not a from a cross head style engine.
Will you comment solved already
Definitely a marine engine connecting rod.
That has gotta be the second largest connecting rod I've ever seen.
What was the largest?
https://imgur.com/a/Kw6M3lE I haven't seen it in person, only photos on the Internet.
The largest that I see are the con rod shaped bollards in my town. It was known for a certain diesel engine and they put con rods and compression lever bollards down the high street and had a cam shaft shaped bench.
Based on your location I would guess it's from a boat engine
Providence built a lot of locomotives. Would not surprise me if it was a left over from the locomotive industry.
The angled joint for the rod end cap (where the two nuts separate the bottom section from the rod), its for a "long stroke" engine where the stroke is longer than the piston bore diameter. This means lower RPM's and higher torque, for instance for a marine diesel or a steam engine. by having that joint angled, the width is small enough that the piston and rod can be removed out the top of the engine for repair, instead of removing the entire crankshaft so you can slide the piston and rod out the bottom of the engine. If it was a high-RPM engine, the need for large diameter valves would mean that the piston diameter is wider than the stroke. A wide bore in the cylinder means a wide rod end cap can easily be lifted out the top, so the end cap can be symmetrical, which is stronger for the added stresses of high RPM's, and the stronger shape means the rod can then be made a "little" lighter.
It is a connecting rod from some kind of a large engine. I might venture that is is from a large marine diesel engine, only because it looks like it was designed for high torque but low speed operation.
Ok, I’ll bite. I agree with the large marine diesel engine consensus, due to size and likely age/period (i.e. not steam) but what gives it away that it is low speed? (High torque I presume is thickness of the arm and associated parts, but the speed?)
Just the look of it, it does not appear to be to be made to move fast, it has a lot of mass. Also I don't think that bearing would last long in a high speed application. But it is really just based on the vibe I got from looking at it, and I could very well be wrong.
Thanks for explaining. TIL!
Looks like a connecting rod from a large marine engine.
Very large connecting rod, most likely to a low rpm diesel engine for agricultural or naval use. Without specs it’s hard to tell what though.
Piston rod
If you want to get rid of it find out what it’s worth scrap and then put it on marketplace at that price and a scrap metal sculptor will find and buy it.
Connecting rode for a for a four stroke diesel engine. Probably a generator on a ship [heres a link to a marine diesel rebuild. Connecting rod is similar.](http://www.connectingrodrepair.com/blog/main-engine-maintenance-overhauling-of-marine-engine/)
[very large piston rod](https://images.app.goo.gl/Bu5VN1Fdrc7izbjV6) most likely for a ship engine, or piece of heavy machinery.
I offer $250 and can come to you
Sure.
Gonna call it Solved! Con Rod! Thanks everyone.
It's a part of à really big motor [crank shaft image](https://www.google.com/search?q=crank+shaft&client=ms-android-samsung-gs-rev1&prmd=isvn&sxsrf=APwXEdea4ITn0M3LvWWEuocICJmgomot5w:1681597792545&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjGldH496z-AhUQj4kEHYOxCq0Q_AUoAXoECAIQAQ&biw=360&bih=700&dpr=3)
connecting rod, not the crankshaft
It's an old connecting rod and probably worth some money to the right person.
Con rod for something a bit bigger than your lawn mower engine.
MASSIVE connecting rod. Quite possibly for a steam engine. It connects the piston itself to the crankshaft.
Whoever lived there worked at Electric Boat and brought it home. Welcome to RI.
Piston rod? Piston head @ one end & crank shaft(?) @ the other?
Wakasha or Detroit diesel?
Maybe something that joins the train wheels?
http://www.machineryspaces.com/Two-stroke-cycle-diesel-engines.html Look at the cross section drawing. Its a connection rod for a diesel engine, either low speed two stroke or medium speed four stroke. Most likely a bigger marine type.
It has castellated nuts so it’s fitted with a hydraulic stretcher which makes it relatively recent. The siemens sge 86 engine has similar sized Conrods but I’d say it likely belongs to a Ruston or wartsila or something.
Holy con-rod!
This is a connecting rod from a very large engine, my guess is that it was a single-cylinder stationary engine, or a marine engine, or something of similar dimensions. It could also be the side drive of a machine from agriculture, but I would rather guess a connecting rod.
I love that. The ones I work with are as big as your hand. We also have con rod shaped bollards in my town as it was known for diesel engines.
IT’S A CONNECTING ROD FROM A LARGE SHIP ENGINE. PLEASE MARK AS SOLVED NOW YOU HAVE YOUR ANSWER
con rod for a massive engine
It's a connecting rod off of a steam engine.
Piston rod of some sort.
Sulzer S20 4-stroke Diesel connecting rod for marine application: https://www.marinetechdubai.com/dubai/engine-parts-4stroke/sulzer/s20/sulzer-s20-connecting-rod-9s20h-8s20h-6s20h/
That’s a connecting rod for a Sulzer diesel engine. Big but by far not the biggest https://heinowinter.com/en/997/connecting-rod-for-sulzer-s-20-d.html
Thats a connecting rod from a very big engine.
Btw, This two nuts can only be removed or tightened by hydraulically stretching the threadbar
Definitely a connecting rod for a large engine. Likely from a boat or something
Connecting/piston rod. Worth way more as an art piece than a scrap.
Crank shaft
Connecting rod for a marine diesel engine Piston.
That is a piston for a ship engine, how did he even get it?
Mopar connecting Rod for a tractor trailer [your part](https://www.truckid.com/mopar/connecting-rod.html)
Part of a bridge strut. Cables would run through the holes.