On Thu, Jan 3, 2013 at 9:10 AM, andy pugh <[email protected]> wrote: > On 3 January 2013 13:38, John Prentice (FS) > <[email protected]> wrote: > >> If you turn the OD and bore the ID of your adaptor then the straightness of >> the arbor is probably a bigger error than your adaptor's concentricity. I >> don't think the keys matter that much - unless I misunderstand the question. > > I rather imagine that the keys provide the cutting torque? > > Any slippage with a gear hob would be a problem. > > I don't really think that 1/8" wall thickness is enough for both an > internal and external keyway (even if staggered), so I was thinking > that the external key would need to be integral to the adaptor. But > that would have to be milled, which means a change in setup. (and my > rotary axis is not particularly good) > > This picture gives me an idea, though: > http://www.ebay.com/itm/MILLING-MACHINE-ARBOR-ADAPTER-COLLAR-SPACER-1-x-1-5-8-x-2-long-9482-/181053049758 > I actually have a spare arbor (MT2, and so no good to me) with a set > of spacers. I can machine a step on two of the wider ones, and use a > super-thick key. > > > -- > atp
Why not turn and bore the adapter, then cut a full length slot in it the width of the key. Then just use a key that's "high" enough to fit in both the keyway slots? Mark ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_122712 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
