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Location:
Sydney
Registered:
February 2005
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Connecting rod
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Fri, 15 July 2005 08:18
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Hey guys, sorry this is a really novice question but i don't know the answer to it! The conrod has 2 rings on each end, does the big end connect to the crankshaft or the piston??
I appreciate your help alot!
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Connecting rod
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Fri, 15 July 2005 08:19
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wow 
crank
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Location:
Sydney
Registered:
February 2005
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Re: Connecting rod
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Fri, 15 July 2005 08:22
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Thank you.
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Location:
Sydney
Registered:
February 2005
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Re: Connecting rod
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Fri, 15 July 2005 08:33
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Does any one know if conrods are mainly press forged? or cold forged? or any other type of forging.
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Connecting rod
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Fri, 15 July 2005 10:47
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Most conrods are just cast, some (forgies) are press forged.
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Location:
Sydney
Registered:
February 2005
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Re: Connecting rod
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Fri, 15 July 2005 11:03
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Awesome, thanks for the info.
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: Connecting rod
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Fri, 15 July 2005 13:18
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double WOW
almost No rods are cast, except for lawnmower engines, and why would it make a bit of difference, may i ask?
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Location:
1st street on the right
Registered:
November 2002
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Re: Connecting rod
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Fri, 15 July 2005 13:26
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From my limited knowledge of metalurgy some things that I use are now hot forged instead of cold formed from barstock and cold pressed or forged. It (at least they quote) greater strength and less stretch/flexation. So it may not be that unreasonable question if the asker has some knowledge of these things, how they will effect strength and the application they are looking to apply it to.
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Location:
Sydney
Registered:
February 2005
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Re: Connecting rod
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Sat, 16 July 2005 09:55
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Cheers greenie!
Allencr, i thought it would be the other way around, i took one out of a mower and it was forged, cheap and nasty. It doesn't make any difference, i just needed a bit of info because im writing an engineers report on the conrod and there is very little info on the internet, or anywhere infact.
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: Connecting rod
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Sat, 16 July 2005 22:53
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lmao,you must have know youd get flamed for that question, thank god they didnt get you to do a engineers report on a rotary or turbine! imagine a 4ag with a 20mm crank journal,the harmonics would be insane. glad to see you now need a engineers report on modified lawn mowers,so that K&N filter and wide wheels dont get you a defect notice.lol please tell me your not in your 4th year of your degree!if you are,keep me informed of the things you engineer when you finish so i can stay the hell away from them{london bridge is falling down,falling down}. just kidding!god i have finally stopped laughing,wait no still laughing.makes me feel like walking into a seminar of computer geeks and asking"now how do i connect to the internet!lmao
ok now i have really stopped laughing.
mick
p.s dont take it to heart unforgiven,you know idiots like myself prefur laughing at someon elses expense,makes us feel better about ourselves!
[Updated on: Sat, 16 July 2005 22:57]
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: Connecting rod
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Sun, 17 July 2005 01:04
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big & little end, or crankpin & wrist/gudgeon pin end.
also its shape/design I beam, H beam, oval or some other, like
forked for some V-twins that aren't offset like Harley...
pin type - pressed fit, sliding/floating or clamped.
rod type - two piece or single that's on a pieced together crank.
cap location type on a two piece - is it indexed with dowel pins, or by shoulders or "cracked" on a machined parting line.
is the cap on an angle so it will fit through the cyl. bore?
is there any thing extra to lubricate the pin & cylinder and piston cooling?
don't forget its tension load!!!! it isn't all about compression
loads under power.
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: Connecting rod
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Sun, 17 July 2005 01:06
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big & little end, or crankpin & wrist/gudgeon pin end.
also its shape/design I beam, H beam, oval or some other, like
forked for some V-twins that aren't offset like Harley...
pin type - pressed fit, sliding/floating or clamped.
rod type - two piece or single that's on a pieced together crank.
cap location type on a two piece - is it indexed with dowel pins, or by shoulders or "cracked" on a machined parting line.
is the cap on an angle so it will fit through the cyl. bore?
is there any thing extra to lubricate the pin & cylinder and piston cooling?
don't forget its tension load!!!! it isn't all about compression
loads under power.
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: Connecting rod
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Sun, 17 July 2005 06:17
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lmfao!
mick
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Connecting rod
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Sun, 17 July 2005 09:38
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What was I smoking when I replied... I was thinking about pistons and typing about conrods (thus the "Forgies" comment).
I don't entirely agree with the "No conrods are cast" comment though.
Not very many conrods are cast and most likely no vehicle currently in production uses cast conrods, however, to say they don't exist in any automotive application is wrong.
Many manufacturers used cast rods at least until the 70/80's... mostly in low RPM wide tolerance engines though. (Pontiac, Buick etc.)
Even the cast rods are cast with the molten steel under pressure though.
"most" OEM rods are forged (hot) using carbon steel
most aftermarket forged rods are made the same way just to a higher quality spec and usually with a higher grade steel or alloy.
Some rods are machined from billet but only really for once off type work.
Some higher quality rods are forged and then fully machined which pretty much gaurantee's there will be no surface faults.
Then there is titanium rods which can be forged or machined from billed.
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Location:
Sydney
Registered:
February 2005
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Re: Connecting rod
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Sat, 23 July 2005 05:23
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| kingmick wrote on Sun, 17 July 2005 08:23 |
lmao,you must have know youd get flamed for that question, thank god they didnt get you to do a engineers report on a rotary or turbine! imagine a 4ag with a 20mm crank journal,the harmonics would be insane. glad to see you now need a engineers report on modified lawn mowers,so that K&N filter and wide wheels dont get you a defect notice.lol please tell me your not in your 4th year of your degree!if you are,keep me informed of the things you engineer when you finish so i can stay the hell away from them{london bridge is falling down,falling down}. just kidding!god i have finally stopped laughing,wait no still laughing.makes me feel like walking into a seminar of computer geeks and asking"now how do i connect to the internet!lmao
ok now i have really stopped laughing.
mick
p.s dont take it to heart unforgiven,you know idiots like myself prefur laughing at someon elses expense,makes us feel better about ourselves!
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I'm in year 11 fuckwit.
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: Connecting rod
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Sat, 23 July 2005 22:26
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even worse being in year 11 you should know everything.lmao
mick
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Location:
Sydney
Registered:
February 2005
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Re: Connecting rod
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Sun, 24 July 2005 12:28
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How the hell does that work? And stop doing " " you look like a cock.
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Location:
Brisbane
Registered:
May 2002
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Re: Connecting rod
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Mon, 25 July 2005 00:38
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Heheh I think you guys upset him. Poor dear.
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: Connecting rod
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Mon, 25 July 2005 01:02
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looks like he is Norbie!lmao. but to show how nice a guy i am unforgiven, i asked my 6 year old son to help you with your project, if it helps.he can explain how an engine works for you etc.he has grown up in a race car workshop so he can answer the questions you have.
mick
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