Greetings -----Original Message----- From: andy pugh [mailto:bodge...@gmail.com] Sent: 03 January 2013 11:45
I have a 1.25" bore gear hob, and a 1" bore horizontal milling arbor for my milling machine. I am trying to figure out how to make an adaptor. The ideal thing would have an internal keyway and an external key, but I can't off-hand think of a way to make that with sufficient guarantee of concentricity. The "Plan B" is a machined sleeve with holes for pegs which can engage both keyways. Not having ever used a horizontal milling arbor, should there be a full-length key? Mine appears to only have one very short key. The arbors I have used typically have a long key going through all the spacers. A short key might wander axially under extended heavy cutting. 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. John Prentice ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
