Identify This Crank

FireSale · 04-25-2014, 04:55 PM

And win ....I'll think of something...

So I ordered this forged 4340 Eagle crank from an on-line dealer I won't mention at this point. The box label is 430230015090 which is the forged crank for sbf 302. The one in the box has 30230005090 - c stamped on the end. My machinist says It's cast and they insist it's the forged one I ordered and the number on the crank is a UPC code and not related to the box label.

Who's right? My machinist has a good reputation.

[IMG]

Eagle Crank by Designer Dale, on Flickr[/IMG]

Dale

russellauto1 · 04-25-2014, 05:07 PM

C means standard , Weight 4340 crankshaft. Google the part number and the Info will come up.

David Lee · 04-25-2014, 06:01 PM

Does it have the think parting line that most cast cranks have?

Alan Roehrich · 04-25-2014, 06:50 PM

They remove the parting line on their cranks in the prep process, at least on all of the cranks I purchased from them.

Only the forged 302 crank has the rod length (5.090) in the part number.

FireSale · 04-25-2014, 07:52 PM

I did Google it. This thread comes up in the search now...

I sent the photo to Eagle and they said the crank is cast. The "C" in the part number stands for cast. I ordered this one:

The Crank I Ordered at the Place That Isn't Listening to Me

The 300 is the stroke and the 5090 is the rod length. That's all they have in common.

Dale

BillK · 04-25-2014, 08:10 PM

Dale,
It would be a lot easier to tell with a picture taken from a little further away but I would trust what Eagle says. I have used a fair number of their cranks and have found some unusual part numbers. Its pretty easy to tell the cast from the forged ones from a little further away

fordteacherguy · 04-26-2014, 11:06 AM

Dale,

You have a PM.

Mike Taylor 3601 · 04-28-2014, 09:17 AM

forged should have .125 radius cast will be probaly .062
Mike Taylor 3601

njk53 · 04-28-2014, 03:11 PM

Look at the parting line. A cast crank will have a thin well defined parting line. A forged crank will have a wide parting line.

FireSale · 04-28-2014, 04:21 PM

Quote:

Originally Posted by njk53

Look at the parting line. A cast crank will have a thin well defined parting line. A forged crank will have a wide parting line.

By the time they are boxed, no Eagle crank has a visible parting line. They all look good and clean. Cast is stamped C and forged is stamped 4340 or whatever alloy it's made from.

Summit has today to respond to my last email and then it's phone time.

Dale

04-25-2014, 04:55 PM	#1
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Identify This Crank And win ....I'll think of something... So I ordered this forged 4340 Eagle crank from an on-line dealer I won't mention at this point. The box label is 430230015090 which is the forged crank for sbf 302. The one in the box has 30230005090 - c stamped on the end. My machinist says It's cast and they insist it's the forged one I ordered and the number on the crank is a UPC code and not related to the box label. Who's right? My machinist has a good reputation. [IMG] Eagle Crank by Designer Dale, on Flickr[/IMG] Dale __________________ Dale Shearon 68 Mustang 6394

04-25-2014, 05:07 PM	#2
russellauto1 Member Join Date: Oct 2008 Posts: 149 Likes: 2 Liked 35 Times in 6 Posts	Re: Identify This Crank C means standard , Weight 4340 crankshaft. Google the part number and the Info will come up.

04-25-2014, 06:01 PM	#3
David Lee VIP Member Join Date: Oct 2007 Posts: 1,168 Likes: 487 Liked 346 Times in 126 Posts	Re: Identify This Crank Does it have the think parting line that most cast cranks have?

04-25-2014, 06:50 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,116 Likes: 1,573 Liked 1,830 Times in 415 Posts	Re: Identify This Crank They remove the parting line on their cranks in the prep process, at least on all of the cranks I purchased from them. Only the forged 302 crank has the rod length (5.090) in the part number. __________________ Alan Roehrich 212A G/S

04-25-2014, 07:52 PM	#5
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: Identify This Crank I did Google it. This thread comes up in the search now... I sent the photo to Eagle and they said the crank is cast. The "C" in the part number stands for cast. I ordered this one: The Crank I Ordered at the Place That Isn't Listening to Me The 300 is the stroke and the 5090 is the rod length. That's all they have in common. Dale __________________ Dale Shearon 68 Mustang 6394

04-25-2014, 08:10 PM	#6
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 230 Likes: 12 Liked 30 Times in 17 Posts	Re: Identify This Crank Dale, It would be a lot easier to tell with a picture taken from a little further away but I would trust what Eagle says. I have used a fair number of their cranks and have found some unusual part numbers. Its pretty easy to tell the cast from the forged ones from a little further away __________________ Bill Koustenis

04-26-2014, 11:06 AM	#7
fordteacherguy Member Join Date: Jun 2007 Location: Federal Way, WA Posts: 238 Likes: 37 Liked 160 Times in 51 Posts	Re: Identify This Crank Dale, You have a PM. __________________ Brian Thompson NHRA Stock / Super Stock Class P/SA 6665 SS/MA 6665

04-28-2014, 09:17 AM	#8
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 354 Liked 307 Times in 103 Posts	Re: Identify This Crank forged should have .125 radius cast will be probaly .062 Mike Taylor 3601

04-28-2014, 03:11 PM	#9
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: Identify This Crank Look at the parting line. A cast crank will have a thin well defined parting line. A forged crank will have a wide parting line. __________________ Nelson Kowal Stock 345