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chamfered bearings???? #1720461
01/02/15 11:05 PM 01/02/15 11:05 PM
Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx Offline OP
super stock
sixty7gtx  Offline OP
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Connecticut, USA
What are chamfered bearing good for???? Thanks

1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,

MOPAR = Machines Of Performance And Racing!!
Re: chamfered bearings???? [Re: sixty7gtx] #1720462
01/02/15 11:17 PM 01/02/15 11:17 PM
Joined: Jan 2006
Posts: 587
IL . usa
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cjs69mope Offline
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They are not good for anything if your crank is not radiused.
They are a necessity on custom ground cranks with large radius.
If stock bearing is used the rods will lock together with stock bearing.

1969 Dodge Charger 1969 Dodge Superbee
Re: chamfered bearings???? [Re: sixty7gtx] #1720463
01/02/15 11:19 PM 01/02/15 11:19 PM
Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing Offline
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Aftermarket crankshaft have a,radius cut on the journal instead of an undercut.
The chamfer is to clear the radius.
Keith

www.dunnuckracing.com
Re: chamfered bearings???? [Re: cjs69mope] #1720464
01/02/15 11:25 PM 01/02/15 11:25 PM
Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx Offline OP
super stock
sixty7gtx  Offline OP
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Quote:

They are not good for anything if your crank is not radiused.
They are a necessity on custom ground cranks with large radius.
If stock bearing is used the rods will lock together with stock bearing.


I Have the Eagle 4340 crank with a 4.375 Stroke.

1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,

MOPAR = Machines Of Performance And Racing!!
Re: chamfered bearings???? [Re: sixty7gtx] #1720465
01/02/15 11:36 PM 01/02/15 11:36 PM
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IL . usa
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cjs69mope Offline
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Most likey stock bearing will not clear ,
Some old timers used to use a bearing knife and make ther own.

1969 Dodge Charger 1969 Dodge Superbee
Re: chamfered bearings???? [Re: cjs69mope] #1720466
01/02/15 11:38 PM 01/02/15 11:38 PM
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
JohnRR Offline
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Quote:


Some old timers used to use a bearing knife and make ther own.



M U S T R E S I S T

Re: chamfered bearings???? [Re: sixty7gtx] #1720467
01/02/15 11:39 PM 01/02/15 11:39 PM
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JohnRR Offline
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Quote:

Quote:

They are not good for anything if your crank is not radiused.
They are a necessity on custom ground cranks with large radius.
If stock bearing is used the rods will lock together with stock bearing.


I Have the Eagle 4340 crank with a 4.375 Stroke.



Yes you need chamfered bearings , and they should clear the chamfer and not need FURTHER chamfering by hand , if they do call eagle and they will fix it .
Re: chamfered bearings???? [Re: JohnRR] #1720468
01/03/15 11:37 AM 01/03/15 11:37 AM
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ahy Offline
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The other option with a radiused crank is narrowed bearings. A small amount of the bearing on each side is removed to clear the radius. That's what I run. Muscle Motors supplied the bearings with the stroker kit.
Re: chamfered bearings???? [Re: ahy] #1720469
01/05/15 05:51 PM 01/05/15 05:51 PM
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dogdays Offline
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I can see no reason that a chamfered bearing would not work on a regular crank. It may not be optimum, but it'd work.

R.
Re: chamfered bearings???? [Re: Dunnuck Racing] #1720470
01/06/15 03:23 PM 01/06/15 03:23 PM
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Columbia, CT
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moper Offline
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Quote:

Aftermarket crankshaft have a,radius cut on the journal instead of an undercut.
The chamfer is to clear the radius.
Keith



x2. B wedges and some small block cranks will have the issue with the radii interfering with the bearings.
...and sometimes the ones sent with the kits need more chamfer than was put on them so you shouldn't assume all's well no matter who supplied it.

Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
Re: chamfered bearings???? [Re: moper] #1720471
01/06/15 03:36 PM 01/06/15 03:36 PM
Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx Offline OP
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Here is one more. Do chamfered bearings have a shorter life?

1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,

MOPAR = Machines Of Performance And Racing!!
Re: chamfered bearings???? [Re: sixty7gtx] #1720472
01/06/15 04:09 PM 01/06/15 04:09 PM
Joined: Jan 2003
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JohnRR Offline
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Quote:

Here is one more. Do chamfered bearings have a shorter life?



A properly working lube system keeps a film of oil between the rotating parts and the bearings, as long as the 2 do not touch while spinning the bearings will live long , chamfered or not.

But I'll ask you a question , if chamfered do NOT last as long would you have a shop grind the chamfers off a crank ?

Last edited by JohnRR; 01/06/15 07:57 PM.
Re: chamfered bearings???? [Re: JohnRR] #1720473
01/06/15 05:54 PM 01/06/15 05:54 PM
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dogdays Offline
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I think JRR meant if chamfered bearings do not last as long would you have the radiused fillets ground off the crank?

It floors me that some people would actually have to think about that.

R.
Re: chamfered bearings???? [Re: dogdays] #1720474
01/06/15 07:58 PM 01/06/15 07:58 PM
Joined: Jan 2003
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JohnRR Offline
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Quote:

I think JRR meant if chamfered bearings do not last as long would you have the radiused fillets ground off the crank?

It floors me that some people would actually have to think about that.

R.




Re: chamfered bearings???? [Re: sixty7gtx] #1720475
01/06/15 09:47 PM 01/06/15 09:47 PM
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ahy Offline
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Quote:

Here is one more. Do chamfered bearings have a shorter life?



The radius in the crank makes it stronger (fatigue strength)... the chamfered bearing has a small reduction in effective bearing area which (in theory) could result in a small reduction in bearing life. In practice, I wouldn't think it is noticeable or meaningful. A very small tradeoff to get a stronger longer lasting crank.
Re: chamfered bearings???? [Re: ahy] #1720476
01/07/15 04:46 AM 01/07/15 04:46 AM
Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar Offline
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I bought some coated rod bearings partly for the coating, and because they are a narrower design to clear the stroker cranks radius fillets.
Re: chamfered bearings???? [Re: 451Mopar] #1720477
01/08/15 01:06 AM 01/08/15 01:06 AM
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fredericksburg,va
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cudaman1969 Offline
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Last i checked the s/s Hemis are running Mercedes, maybe Honda, bearings, very small and narrow. It would depend on the rod-piston weight-rpm plus good oil film. I would never worry about chamfered bearings
Re: chamfered bearings???? [Re: cudaman1969] #1720478
01/08/15 11:56 AM 01/08/15 11:56 AM
Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx Offline OP
super stock
sixty7gtx  Offline OP
super stock

Joined: Jan 2008
Posts: 894
Connecticut, USA
Quote:

Last i checked the s/s Hemis are running Mercedes, maybe Honda, bearings, very small and narrow. It would depend on the rod-piston weight-rpm plus good oil film. I would never worry about chamfered bearings



Thank you for your message!!!!!!!!

1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,

MOPAR = Machines Of Performance And Racing!!
Re: chamfered bearings???? [Re: sixty7gtx] #1720479
01/08/15 11:58 AM 01/08/15 11:58 AM
Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx Offline OP
super stock
sixty7gtx  Offline OP
super stock

Joined: Jan 2008
Posts: 894
Connecticut, USA
Quote:

Quote:

Last i checked the s/s Hemis are running Mercedes, maybe Honda, bearings, very small and narrow. It would depend on the rod-piston weight-rpm plus good oil film. I would never worry about chamfered bearings



Thank you for your message!!!!!!!!



I take care of my Engine. Never beat on it. I have approx. 1000 miles on my motor. I put brad penn oil in it. What do you think of synthetic oil???

1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,

MOPAR = Machines Of Performance And Racing!!
Re: chamfered bearings???? [Re: sixty7gtx] #1720480
01/08/15 01:04 PM 01/08/15 01:04 PM
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
JohnRR Offline
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JohnRR  Offline
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Quote:

Quote:

Quote:

Last i checked the s/s Hemis are running Mercedes, maybe Honda, bearings, very small and narrow. It would depend on the rod-piston weight-rpm plus good oil film. I would never worry about chamfered bearings



Thank you for your message!!!!!!!!



I take care of my Engine. Never beat on it. I have approx. 1000 miles on my motor. I put brad penn oil in it. What do you think of synthetic oil???



what a sad life the car is leading , drive it like it was built to be .

From what I have been told you need to have over 5k miles before you think about switching to synthetic , and you need to make sure it's flat tappet friendly oil .
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