I have a Rivett 608 which I am gradually restoring. When I removed the headstock (the bed needs to be scraped-in), I noticed that the scraping marks there were VERY wide, on the order of an inch or so. But the marks were rather "elegant" if I can use that term, about scraping marks. The machine was made just after WW2, if that helps identify the time and likely scraping technique.
I will try to get pictures, but it is very difficult to take a good picture of scraping marks.
What sort of grind on the scraper gives that wide a mark? Straight across?
What is the purpose of that width? It is a bearing only area, and not a way, so the ppi is not so important, but that is very wide.
I can see such a tool might be very useful for roughing, to cut down the small islands that often exist after a heavy pass or two, do you suppose it was actually ground straight across (presumably with corners rounded)?
I will try to get pictures, but it is very difficult to take a good picture of scraping marks.
What sort of grind on the scraper gives that wide a mark? Straight across?
What is the purpose of that width? It is a bearing only area, and not a way, so the ppi is not so important, but that is very wide.
I can see such a tool might be very useful for roughing, to cut down the small islands that often exist after a heavy pass or two, do you suppose it was actually ground straight across (presumably with corners rounded)?