Bearing scraping film

[A G Wood]

Stuart, I think George is being a bit harsh, they look like a nice bit of work and a time-honoured use for knackered files. I think the reason they feel nicer to use is because they're basically bespoke, and you have most likely unconsciously subtly  adapted them to your own hand. I have read of the outer races of large ball bearings being repurposed as scrapers too, the advantage was given was they are already on their way to being hollow ground due to the ball groove