In this video I machine a pair of cast iron machinist straight edges from VintageMachinery.org
on my Kearney & Trecker 2HL horizontal mill in preparation for an upcoming hand scraping class with . These are the 9″ and 12″ Rucker Tool Co. straight edges that will eventually be hand scraped for precision work, but first they needed to be machined true and cleaned up from the raw castings.
Things did not go entirely according to plan.
Partway through the machining process I started fighting chatter problems that had me scratching my head, and I later discovered I had made a pretty significant setup mistake — the milling head wasn’t properly tightened. To make matters worse, after finishing the machining work, I managed to drop one of the straight edges and ding the freshly machined surface. Fortunately, everything is recoverable, but it definitely means more work when scraping begins.
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