| Amana handout [message #337465] |
Mon, 01 October 2018 08:46  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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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 - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Amana handout [message #337466 is a reply to message #337465] |
Mon, 01 October 2018 09:36  |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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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
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| Re: Amana handout [message #337474 is a reply to message #337466] |
Mon, 01 October 2018 10:30 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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midlf wrote on Mon, 01 October 2018 10:36Great 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 - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Amana handout [message #337484 is a reply to message #337474] |
Mon, 01 October 2018 12:02 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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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@list.gmcnet.org
Subject: Re: [GMCnet] Amana handout
midlf wrote on Mon, 01 October 2018 10:36
> 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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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Amana handout [message #337487 is a reply to message #337465] |
Mon, 01 October 2018 12:48 |
rjw
Messages: 697
Registered: September 2005
Karma: 4
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Senior Member |
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Matt Colie wrote on Mon, 01 October 2018 09:46I 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
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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| Re: [GMCnet] Amana handout [message #337519 is a reply to message #337510] |
Mon, 01 October 2018 18:38 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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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.
On Mon, Oct 1, 2018 at 6:09 PM Richard Denney wrote:
> 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
>
> On Mon, Oct 1, 2018 at 4:48 PM Keith V wrote:
>
>> 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?
>
>
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Ken Henderson
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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