06-12-2020, 04:21 PM (This post was last modified: 06-12-2020, 04:28 PM by Colin Wilks.)
I had some newly reground cam followers (std 3/8") from a supplier. The one on the left is pitted as shown. The one on the right I consider good, although when I blow the photo up it too has one small pit.
I have had the camshaft refreshed by Paul Bonewell, so don't want to spoil the ship for a ha'porth of tar, but am I being too fussy?
Is it possible the grind has gone through the surface hardening? It is definitely a few thou shorter than its neighbour.
06-12-2020, 05:00 PM (This post was last modified: 06-12-2020, 05:01 PM by Colin Wilks.)
Cheers Ruairidh. Do you consider the one on the left scrap, or is it worth a regrind? I am not sure if the followers are fully hardened or just surface hardened, if the latter is it practical to harden it again by heating and quenching? I am not aware of anyone making new ones.
Great news, Tony. Something that's been needed for some time. Picking 8 good ones from the pile of used ones has become more and more difficult as time's gone on.
06-12-2020, 05:57 PM (This post was last modified: 06-12-2020, 05:58 PM by Chris KC.)
I think the pocketing on the follower will cause lubrication problems and accelerated wear so yes please bin it or at least grind until the pitting disappears.
As for hardening, I have no clue what the original spec was but I'm not aware that anyone hardens (or re-hardens) after re-profiling?