The cover story for the April 2016 issue (#224) is Caleb James’s article on making matched sets of Roubo-style moulding planes (the three sizes for which he reaches the most: Nos. 4, 6 and 8). To whet your appetite (and so I can show off the gorgeous opening image shot by Daniel Dubois, whom you really ought to follow on Instagram), below is a preview: a “sidebar” Caleb wrote about how to heat treat O1 steel using a simple setup and one clever jig (that is not a click-bait line – promise).
The issue mails to subscribers in mid-February, and will be on newsstands at the beginning of March.
Heat Treating O1 Steel
Heat treating O1 tool steel is simple. In short, bring it to critical temperature, quench it in vegetable oil, then temper it in an toaster oven or regular kitchen oven for one hour at 400˚.