Author Topic: engine bearings  (Read 4182 times)

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Stangman

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engine bearings
« on: April 08, 2021, 03:39:29 PM »
So it seams I have part numbers,,,

7200CHU  .001 which seams straight forward.

7176CHB 1XL  .001  When I look it up it seams its SBC rod bearings. Am I burnt or what alittle help please

turbohunter

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Re: engine bearings
« Reply #1 on: April 08, 2021, 03:47:52 PM »
Not quite sure what you’re asking.

If you need a main bearing number
SLP-125M or SLP-125M10
Lots at Summit

What crank?
« Last Edit: April 08, 2021, 03:58:36 PM by turbohunter »
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


Stangman

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Re: engine bearings
« Reply #2 on: April 08, 2021, 04:04:50 PM »
Scat crank It seems the listing is weird

turbohunter

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Re: engine bearings
« Reply #3 on: April 08, 2021, 04:41:16 PM »
Rods
CLE-CB743HN
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


Stangman

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Re: engine bearings
« Reply #4 on: April 08, 2021, 04:57:59 PM »
Bearing pics

turbohunter

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Re: engine bearings
« Reply #5 on: April 08, 2021, 05:04:22 PM »
Is it the Chevy thing that’s throwing you?
Because the Scat crank rod journals are Chevy sized so the listings read that way.
If your deep into a thrash that may not occur to you.
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


Gaugster

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Re: engine bearings
« Reply #6 on: April 08, 2021, 05:14:36 PM »
Just parroting what I've heard but scat cranks have a larger radius on the journals.  This adds strength but requires a slightly more narrow bearing. Hence a part number variant. I think this applies to both rod and mains but I could be mistaken.
« Last Edit: April 08, 2021, 05:16:43 PM by Gaugster »
John - '68 Cougar XR7 390 FE (X-Code) 6R80 AUTO

turbohunter

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Re: engine bearings
« Reply #7 on: April 08, 2021, 05:17:46 PM »
They are 2.200
Chevy size.
My 1UB is 2.420ish.
« Last Edit: April 08, 2021, 05:28:42 PM by turbohunter »
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


Gaugster

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Re: engine bearings
« Reply #8 on: April 08, 2021, 05:25:33 PM »
Yeah John they are 2.200. It’s a larger diameter.
Chevy size.
I am referring  to the radius of where the crank journal blends into the counterweight. But i guess if the bearings are intended Chevy and Scat it should be good.
John - '68 Cougar XR7 390 FE (X-Code) 6R80 AUTO

turbohunter

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Re: engine bearings
« Reply #9 on: April 08, 2021, 05:29:33 PM »
Yup I was mistaken there saying it’s larger.
Middle of a thrash. ::)
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


Stangman

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Re: engine bearings
« Reply #10 on: April 08, 2021, 05:35:03 PM »
Yes I know the rods are BBchevy but when i looked them up it said SBC so thats why I loaded up these pictures maybe Im missing something.

turbohunter

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Re: engine bearings
« Reply #11 on: April 08, 2021, 05:37:06 PM »
When I bought mine they were list for big AND small block. Seems odd though. I’m not a Chevy dude.
As I go back and check the PN I gave you it’s for bbc and 348/409 stuff.
But that’s the correct pn right from Jay.
I think I’m done grinding on rings for the day.
« Last Edit: April 08, 2021, 05:47:41 PM by turbohunter »
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


blykins

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Re: engine bearings
« Reply #12 on: April 08, 2021, 05:45:04 PM »
I usually one of the following main bearings:  FM 125M, Clevite MS1010H (for aftermarket block or with tangs sanded off for factory block), Calico coated King MB559AM.  Obviously, if you need a "ground" version of those, then you would add that to the end of the bearing:  FM125M10, MS1010H10, etc.

For rod bearings, I use:  FM 8-7200CH, Clevite CB743HN, or Calico coated Clevite CB743HN.  Same thing applies to rod bearings with sizing. 

As mentioned above, always check rod bearing to crank fillet clearance.  Check it every time, don't take anything for granted, even if it's the same combo you've used 100 times.

The part number for a SBC rod bearing is completely different and they do not interchange as the journal sizes are different.  A 2.100" journal SBC uses something like a CB663HN and a 2.000" rod journal uses something like a CB745HN.
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turbohunter

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Re: engine bearings
« Reply #13 on: April 08, 2021, 05:48:46 PM »
Thanks Brent.
BTW those FM bearings Brent is quoting will show up as Speed Pro 125M. Or maybe Sealed Power.
That through me for a loop for a bit.
« Last Edit: April 08, 2021, 06:29:16 PM by turbohunter »
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


Stangman

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Re: engine bearings
« Reply #14 on: April 08, 2021, 06:53:30 PM »
The coated bearings whats the difference in the regular bearing coating and the black or grey coating. Is it worth getting them. Are they good for the street
« Last Edit: April 08, 2021, 07:11:21 PM by Stangman »