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Re: shot pein ? [Re: AndyF] #2722136
12/06/19 08:25 PM
12/06/19 08:25 PM
Joined: Aug 2003
Posts: 34,014
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 34,014
Bend,OR USA
Years ago (1988 or so) I had three different new sets of forged steel H beam rods for BB and 426 Hemi motors I wanted magged, a set of Eagles, a set of CAT and a set of Carillo for the hemi. I took all three sets of rods to my crankshaft grinder, Wilson Bros Grinding in Ontario, CA and ask Ron if he could tell me what brand they where (none of them where in the boxes they came in and none of them had markings that he could see when I placed them on the bench before he came over to look at them. he said that the one set was Carillo and when I ask him how he knew that he said because they where the only set double shot peened shock I didn't see that but he did up work

Last edited by Cab_Burge; 12/06/19 08:26 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: shot pein ? [Re: moparx] #2722166
12/06/19 09:57 PM
12/06/19 09:57 PM
Joined: Jun 2003
Posts: 51,396
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 51,396
Romeo MI
Originally Posted by moparx
when shot peining items, what is the guage of shot used, and the typical air pressure ?
as always, TIA. up
beer


I use to shot peen the transverse torsion bars back when we were developing the old F-body... the pressure
and shot size varied based on the material you were working with.. with those torsion bars if they werent
shot peened they would explode at the bend every time when I would try preload then... the shot peen was
a stress reliever...we tried multiple sized shot and even different sized shot on a single bar.. the peening also
compressed the steel to assist the strength of the steel... also you can double peen or more... I also use
to shop peen (douple shot peen) my viper rods
wave

Re: shot pein ? [Re: mopardamo] #2722207
12/06/19 11:39 PM
12/06/19 11:39 PM
Joined: Jan 2003
Posts: 3,359
DFW
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mr_340 Offline
master
mr_340  Offline
master
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Joined: Jan 2003
Posts: 3,359
DFW
Originally Posted by mopardamo
Hey 340, Wiki first states that it adds compressive stress then later says relives stress. Thats the stuff that i'd like to get to the bottom to. Which one add/relieve? An old mentor of mine that was McDonnell Douglas ball bearing top dog said it added stress. I'm on same page as Transman.


There are several good answers here and I didn't write the Wiki page. I'm thinking if you have some residual tensile stresses on the surface of a part, then peening would add compressive stresses to relieve the tensile stresses. My SWAG on the matter. Now I'm wondering how a machinist can tell if a part was double shot peened?

Answer:
https://www.shotpeener.com/library/pdf/2013029.pdf

Last edited by mr_340; 12/06/19 11:49 PM.

Floyd Lippencott IV
Re: shot pein ? [Re: mr_340] #2722305
12/07/19 01:09 PM
12/07/19 01:09 PM
Joined: Sep 2003
Posts: 12,182
north of coder
moparx Offline OP
"Butt Crack Bob"
moparx  Offline OP
"Butt Crack Bob"

Joined: Sep 2003
Posts: 12,182
north of coder
interesting article mr340.
thank you.
beer

Re: shot pein ? [Re: moparx] #2722314
12/07/19 01:44 PM
12/07/19 01:44 PM
Joined: Dec 2003
Posts: 18,253
Trumussia
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jcc Offline
No politics
jcc  Offline
No politics
J

Joined: Dec 2003
Posts: 18,253
Trumussia
So this thread then begs the question, shot peen then cryo, or cryo then shot peen?


"Perfection is the enemy of Excellence" German Engineer
Re: shot pein ? [Re: jcc] #2722342
12/07/19 03:29 PM
12/07/19 03:29 PM
Joined: Oct 2005
Posts: 7,219
Ontario, Canada
S
Stanton Offline
Don't question me!
Stanton  Offline
Don't question me!
S

Joined: Oct 2005
Posts: 7,219
Ontario, Canada
Originally Posted by jcc
So this thread then begs the question, shot peen then cryo, or cryo then shot peen?



Can we just take him out a shoot him ???

Re: shot pein ? [Re: jcc] #2722355
12/07/19 04:19 PM
12/07/19 04:19 PM
Joined: Jun 2003
Posts: 51,396
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 51,396
Romeo MI
Originally Posted by jcc
So this thread then begs the question, shot peen then cryo, or cryo then shot peen?


We use to shot peen the last thing
wave

Re: shot pein ? [Re: MR_P_BODY] #2722416
12/07/19 09:31 PM
12/07/19 09:31 PM
Joined: Nov 2013
Posts: 300
Southern Alberta
Uberpube Offline
enthusiast
Uberpube  Offline
enthusiast

Joined: Nov 2013
Posts: 300
Southern Alberta
Check out WPC treatment, it's micro shotpeening. It's a big boasting point in Japanese tuning shops of how much power they can make on factory bone stock parts, they use WPC on everything.

Re: shot pein ? [Re: Uberpube] #2722684
12/08/19 11:55 PM
12/08/19 11:55 PM
Joined: Sep 2005
Posts: 1,326
St. Louis, MO
mopardamo Offline
pro stock
mopardamo  Offline
pro stock

Joined: Sep 2005
Posts: 1,326
St. Louis, MO
That WPC is pretty wicked! Thanks for sharing!

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