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A 4hp REID project by John Burns


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  #31  
Old 03-28-2008, 08:08:52 PM
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Jordan Jordan is offline
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Default Re: 4hp REID crankshaft pic

looking good john. how long did it take you to turn the ends?

jordan
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  #32  
Old 03-29-2008, 12:23:07 AM
John Burns John Burns is offline
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Default Re: 4hp REID crankshaft pic

Takes 10 to 12 hrs per crank, 4140 mat'l

jb
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  #33  
Old 03-29-2008, 01:14:04 AM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: 4hp REID crankshaft pic

Looking good John!
Andrew
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  #34  
Old 03-29-2008, 10:11:28 AM
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Elden DuRand Elden DuRand is offline
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Default Re: 4hp REID crankshaft pic

John:

Where did you get the raw material (IF you will give away your secrets.). It looks like you had steel castings made especially for those crankshafts.

Those are gonna be nice shafts.

What do you do about heat treating or does that alloy remain stable after machining?

Take care - Elden
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  #35  
Old 03-29-2008, 02:18:18 PM
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Mike Monnier Mike Monnier is offline
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Default Re: 4hp REID crankshaft pic

They appear to burnt out of plate to me Elden. You can see the distinctive pattern produced by a Blanchard grinder on the blank in the background. Looks beautiful John!
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  #36  
Old 03-29-2008, 06:18:57 PM
John Burns John Burns is offline
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Default Re: 4hp REID crankshaft pic

Eldan, they were billet cut (acetalyne torch) from large plates, annealed and ground. Then they were water jet cut to the blank dimentions.

jb
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  #37  
Old 03-29-2008, 06:28:16 PM
John Burns John Burns is offline
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Default Re: 4hp REID crankshaft pic

4140 has very strong tortional strength, it is a common alloy used for a variety of things. Any steel supplier can provide it for you.

jjb
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  #38  
Old 03-29-2008, 07:59:08 PM
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Default Re: 4hp REID crankshaft pic

Quote:
Originally Posted by John Burns View Post
Eldan, they were billet cut (acetalyne torch) from large plates, annealed and ground. Then they were water jet cut to the blank dimentions.

jb
John:

That must have been some torch to cut that out! I can see how you do the mains but how do you turn the crankpin unless you have a really big lathe!

Take care - Elden
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  #39  
Old 03-30-2008, 12:52:13 AM
John Burns John Burns is offline
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Default Re: 4hp REID crankshaft pic

I have a local crankshaft grinding shop, all I have to do is give him accuratly milled square dimention on the throw and he will grind it!

jjb
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  #40  
Old 04-07-2008, 01:14:46 AM
John Burns John Burns is offline
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Default 4 hp REID crankshafts

More pic's, next stop crankshaft grinder!
jjb
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