size for plans

rennie

rennie

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Hey I guess I have a case of dumb butt. I have some plans for a hand made milling vise for a 7" lathe and they said to increase the size by 1/4 for a 9-10" lathe? What formula do you use for this?? or has anyone done this? Any help would be appreciated.:thinking:
 
If you multiply all of the external dimensions by 1.25, the vise will be 1/4 larger. I wouldn't bother with screws and holes.

Tom
 
That was what I kina thought. I did not want to start a project and find out I was wrong. Thanks.:))
 
I must have been reading the same article because I remember the same instructions. I was thinking about going about it slightly differently.

Have you ever heard of the 3d drawing program Sketchup? There is a free version that is pretty much just as good as the pro version only you can't do a few things like import or export AutoCAD drawings. I use it all the time (I'm an architect and we use it at work daily) for my woodworking projects and now I'm starting to use it for machining projects. A few years ago Google bought the developer that made it, now I believe they sold it off to yet another developer.

You could actually model the entire milling vise according to the plans, then simply use the scale tool and scale the entire 3d model by 1.25. In that case it would even scale the screws and holes if you wanted it to.
 
Being that I DRAW in AUTOCAD and Pro-E every day, I Find it Helpful to Draw a Solid model of any Project before Putting tooling to metal. Especially in AutoCad, because when Making a Solid model it's a subtractive (SP) Process much like Machining. So Drawing it helps me Plan out every operation, and makes the Math so much easier
 
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