Kelpie
Well-known member
Hope the image links work.
I've just pulled the chainplate from one of my cap shrouds. Noticed some brown discolouration around the entry point in the deck, and upon further investigation the lower part looked quite bad with surface rust and black pitting. It was also slightly magnetic, unlike all of the other chainplates, which I thought might be a bad sign.
Anyway I've given it a quick clean up with a 120 flap disc. To my untrained eye the pitting is not too deep and there must be 99%+ of the original metal still there. Hard to see how this is a weak point compared to the 8mm diameter shroud itself. But I know that it doesn't always work like that and I'm a bit out of my depth on the finer points of metallurgy.
For context, I'm a long way from home and waiting in SE Ireland for a window to cross Biscay. So no pressure.
Local engineering firm can supply me a new length of bar but only in 304 grade.
Obviously it's very hard to tell from a photo just how bad the existing chainplate is, but an extra opinion never hurts, so I'd be grateful for any words of wisdom.
PXL-20210821-111309840
PXL-20210821-111304943
PXL-20210821-111259371
PXL-20210821-111253429
PXL-20210821-111248066
I've just pulled the chainplate from one of my cap shrouds. Noticed some brown discolouration around the entry point in the deck, and upon further investigation the lower part looked quite bad with surface rust and black pitting. It was also slightly magnetic, unlike all of the other chainplates, which I thought might be a bad sign.
Anyway I've given it a quick clean up with a 120 flap disc. To my untrained eye the pitting is not too deep and there must be 99%+ of the original metal still there. Hard to see how this is a weak point compared to the 8mm diameter shroud itself. But I know that it doesn't always work like that and I'm a bit out of my depth on the finer points of metallurgy.
For context, I'm a long way from home and waiting in SE Ireland for a window to cross Biscay. So no pressure.
Local engineering firm can supply me a new length of bar but only in 304 grade.
Obviously it's very hard to tell from a photo just how bad the existing chainplate is, but an extra opinion never hurts, so I'd be grateful for any words of wisdom.
PXL-20210821-111309840
PXL-20210821-111304943
PXL-20210821-111259371
PXL-20210821-111253429
PXL-20210821-111248066