Should there be fillet radius' ground on the mains as well as the big ends?
Crankshaft Fillet Radius
Started by
Cooper-202S
, Jan 10 2009 12:47 PM
5 replies to this topic
#2
Paul Wiginton
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Posted 10 January 2009 - 01:05 PM
Yes, there should always be a radius. If its a sharp inside corner it will create a weak point that can cause a crack
Paul
Paul
#3
Ethel
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Posted 10 January 2009 - 01:13 PM
Not all cranks had fillet radii. I think they were vaguely introduced with the A+ to compensate for lower grade steel. Always better to have one though.
#4
Cooper-202S
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Mini Mad
Posted 10 January 2009 - 01:19 PM
Sorry a bit more detail if possible.
If i've got this right?
The fillet raduis on the big ends is ground/rolled below the bearing surface so it forms a rounded groove between the bearing face and the journal.
the mains just have a radius between the bearing surface and the jounal but isn't recessed.
If i've got this right?
The fillet raduis on the big ends is ground/rolled below the bearing surface so it forms a rounded groove between the bearing face and the journal.
the mains just have a radius between the bearing surface and the jounal but isn't recessed.
#5
Paul Wiginton
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Posted 10 January 2009 - 01:29 PM
A rolled fillet is below the bearing surface and the ground fillet is same level, if that makes sense
paul
paul
#6
Ethel
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Posted 10 January 2009 - 01:38 PM
The radius is the important thing. A rolled radius will be recessed.
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