I dislike the Sandvik scraper as they are a bit on the stiff side but their scraping inserts are very good. You can buy the 25mm x 3mm steel shanks from Tilgear you'll get enough for £20 to make 10 scrapers:
Here's how you make them:
Mill a 1mm deep relief about 8-10 mm wide in the end then cut it off
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Now mill a relief in the end again. Clamp an insert between the pieces with mole grips.
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Now weld along the back of the clamp then remove the insert before it gets too hot. Drill and tap for M5/M6 countersunk screws.
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Easy peasy. You can cut a file tang the other end for a (large) file handle of I bought a big fat curtain rod from the boot fair for £2 and made handles from that.
I made all these in an afternoon.
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Its one of those skills that i would love to learn, a very knackered elbow & the other that is showing wear mean i best not go there!
Thats interesting, looks like the true edges are the most expensive and hard to locate part in all this@Pete. scraper looks nice and simple but if you don't have a mill or not inclined to make your own, there's an eBay seller selling them with insert for £60
In addtion to the scraper you need:
A slow speed grinder to re dress the edge - a search on here will reveal homebuilds, including mine made from a polishing mop which performs adequately.
A surface plate big enough for your largest component - and big enough to scrape your straight edge if needed!
A straight edge big enough for printing components which won't fit on the surface plate.
An slip stone or similar:
A lino roller or similar for spreading blueRound Edge Slip Stone - Aluminium Oxide | Zoro UK
Round Edge Slip Stone - Aluminium Oxide, 5 products available to order online. Next day delivery available on most items, free delivery on orders over £25!www.zoro.co.uk
Some bluing compound.
Measuring instruments - DTI's, micrometers etc
Some spare time
Patience
More spare time
I think Lookcreations on YT scraped in his Holbrook lathe bed with a straight edge shorter than the bed but it didn't look fun!
Thats interesting, looks like the true edges are the most expensive and hard to locate part in all this
How is it possible to avoid runout from one end to another with a straight edge shorter than the lathe bed?
You use a precision level to scrape longer than the straight edge. You can loose control with a long straight edgeThats interesting, looks like the true edges are the most expensive and hard to locate part in all this
How is it possible to avoid runout from one end to another with a straight edge shorter than the lathe bed?
Do you have a link? Searching ebay for scrapers ...
Ok or better to get sandvic?I believe they are a Russian carbide
Ok or better to get sandvic?
I buy biax carbides as they’re not to dear£55 for one of Matts scrapers. I don’t know how much blades are