Amana handout

[Matt Colie]

I heard that a few missed the handout for the Bolts and Gaskets presentation.
Below is a link that will get you a *.pdf of the slides.

https://www.dropbox.com/s/3s5k6e0tm223ycb/fasteners.pdf?dl=0

I am expecting this to be published on the GMCMI site when time permits.
If you have questions, there is an @ddress on the cover page.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[steve southworth]

Great presentation. Explains some of the things I "knew". Dismisses some of the things I thought I "knew".

Now what I would like to find out is: What grade of fastener to use for what application. I believe (but can't measure so it is an opinion) that, as
stated, fastener grades are not interchangeable. Why?

Is there a website that can explain that in a way normal mortals can understand?
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

 

[Matt Colie]

> Great presentation. Explains some of the things I "knew". Dismisses some of the things I thought I "knew".
>
> Now what I would like to find out is: What grade of fastener to use for what application. I believe (but can't measure so it is an opinion)
> that, as stated, fastener grades are not interchangeable. Why?
>
> Is there a website that can explain that in a way normal mortals can understand?

Steve,

You asked two separate questions, so I will try to use the extremes of the first to make the issue clear.
If you use a Gr.2 in an assembly that requires a Gr.8, it may simply fail at the operation load.
=> Simple enough - Right? But wait....
If you use a Gr.8 where a Gr.2 was expected, and someone identifies it as such and tries to tension it to the higher spec, the threads may get ripped
right out of a critical casting. Manufactures (good ones) actually design the thread engagement so that the fastener will (hopefully) fail before
this happens.

As for an answer for your second....
Sorry, none that I know of.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[Keith V]

So, if I use a Gr8 instead of a Gr5, should I torque it to the Gr5 spec?
Or is that not going to stretch the Gr8 enough?
________________________________
From: Gmclist on behalf of Matt Colie
Sent: Monday, October 1, 2018 10:30 AM
To: gmclist
Subject: Re: [GMCnet] Amana handout

> Great presentation. Explains some of the things I "knew". Dismisses some of the things I thought I "knew".
>
> Now what I would like to find out is: What grade of fastener to use for what application. I believe (but can't measure so it is an opinion)
> that, as stated, fastener grades are not interchangeable. Why?
>
> Is there a website that can explain that in a way normal mortals can understand?

Steve,

You asked two separate questions, so I will try to use the extremes of the first to make the issue clear.
If you use a Gr.2 in an assembly that requires a Gr.8, it may simply fail at the operation load.
=> Simple enough - Right? But wait....
If you use a Gr.8 where a Gr.2 was expected, and someone identifies it as such and tries to tension it to the higher spec, the threads may get ripped
right out of a critical casting. Manufactures (good ones) actually design the thread engagement so that the fastener will (hopefully) fail before
this happens.

As for an answer for your second....
Sorry, none that I know of.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

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[RJW]

> I heard that a few missed the handout for the Bolts and Gaskets presentation.
> Below is a link that will get you a *.pdf of the slides.
>
> https://www.dropbox.com/s/3s5k6e0tm223ycb/fasteners.pdf?dl=0
>
> I am expecting this to be published on the GMCMI site when time permits.
> If you have questions, there is an @ddress on the cover page.
> Matt

Matt, I'm happy that you were able to put on a tech session on topics that you know very well and I know next to nothing. I enjoyed it and learned
quite a bit.

--
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com


Coop Roller Cam 455, Howell TBI + EBL, 3.42 FD, Quadra Bag, Macerator, Manny Tranny etc.

 

[Rdenney]

Bolts stretch the same at a given load no matter what their strength. All
steels have a similar stiffness even if the strength is different.

Tighten to the specs established for the application (that is, the bolt the
assembly was designed to use).

Rick “In short: tighten to Gr. 5 specs in your hypothetical case” Denney

> So, if I use a Gr8 instead of a Gr5, should I torque it to the Gr5 spec?
> Or is that not going to stretch the Gr8 enough?
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com

 

[Ken H.]

Right. Look at the stress-strain diagrams in Matt's presentation and
you'll see that all grades have the same slope up to their yield values.

Ken H.

> Bolts stretch the same at a given load no matter what their strength. All
> steels have a similar stiffness even if the strength is different.
>
> Tighten to the specs established for the application (that is, the bolt the
> assembly was designed to use).
>
> Rick “In short: tighten to Gr. 5 specs in your hypothetical case” Denney
>

>
> > So, if I use a Gr8 instead of a Gr5, should I torque it to the Gr5 spec?
> > Or is that not going to stretch the Gr8 enough?
>
>