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<blockquote data-quote="PeterT" data-source="post: 13174" data-attributes="member: 22"><p>Sorry, above my pay grade, but I think what is being discussed is a magnetic chuck like what is typically used on a surface grinder. I'm really not sure how they test for magnetic clamping force of semi or reduced magnetic strength alloys other than to throw the lever & see how well it sticks, maybe with side strip steel backing bars. </p><p></p><p>Link <a href="https://www.moldmakingtechnology.com/articles/use-magnetic-chucks-to-reduce-your-cost-of-operation" target="_blank">https://www.moldmakingtechnology.com/articles/use-magnetic-chucks-to-reduce-your-cost-of-operation</a></p><p>suggests that 416 stainless (which is one of the more magnetic stainless steels) is about half the attractive strength of typical steel, but they go on to say that's about same as cast iron which I've seen held. It might be a function of mass & surface contact area. Maybe your alloy is similar to 416 if a magnet sticks. Another complication might be the blade overextending the mag vise footprint unsupported, so maybe requiring a cradling jig. Grinder shops are even a bit more specialized. </p><p></p><p>My gut feel is this project is in the domain of bladesmith type folks. I've seen pics & vids where they are using belt/wheel sanders, the same equipment as knifemaking & working to similar tolerances. Your project would be similar with requirements of a blunter edge plus the surface detailing you mention, but no heat treating.</p><p><a href="https://www.jayfisher.com/knifemaking_history.htm" target="_blank">https://www.jayfisher.com/knifemaking_history.htm</a></p><p></p><p>[MEDIA=youtube]oJdku3S-a2c[/MEDIA]</p></blockquote><p></p>
[QUOTE="PeterT, post: 13174, member: 22"] Sorry, above my pay grade, but I think what is being discussed is a magnetic chuck like what is typically used on a surface grinder. I'm really not sure how they test for magnetic clamping force of semi or reduced magnetic strength alloys other than to throw the lever & see how well it sticks, maybe with side strip steel backing bars. Link [URL]https://www.moldmakingtechnology.com/articles/use-magnetic-chucks-to-reduce-your-cost-of-operation[/URL] suggests that 416 stainless (which is one of the more magnetic stainless steels) is about half the attractive strength of typical steel, but they go on to say that's about same as cast iron which I've seen held. It might be a function of mass & surface contact area. Maybe your alloy is similar to 416 if a magnet sticks. Another complication might be the blade overextending the mag vise footprint unsupported, so maybe requiring a cradling jig. Grinder shops are even a bit more specialized. My gut feel is this project is in the domain of bladesmith type folks. I've seen pics & vids where they are using belt/wheel sanders, the same equipment as knifemaking & working to similar tolerances. Your project would be similar with requirements of a blunter edge plus the surface detailing you mention, but no heat treating. [URL]https://www.jayfisher.com/knifemaking_history.htm[/URL] [MEDIA=youtube]oJdku3S-a2c[/MEDIA] [/QUOTE]
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