Precision Vise

After about 30 plus hours of grinding, my new precision vise is finished.
 

A view of the V's in the movable jaw.
 

Both vises can hold parts that are over five inches long.
 

You never know what you might work on so this is why you make your vise square, just in case you have to hold your work piece in this manner.
 

5" Sine Vise

My first attempt at making a sine vise and it took longer than I thought it would.
 

The entire vise is square and parallel within .0002". Just so you know, that's not easy to do. The key to this is to take your time and go slow.
 

A close-up of the hinge or moveable cylinder.
 

The curved clamp is to make sure nothing moves once you have the angle that you want. Speaking of angles, I checked the accuracy of my 5" sine vise at my work on a coordinate measuring machine (CMM) and found out it's almost dead on. And to do this I could use any angle that I wanted as long as the CMM checking it new the angle I was attempting to use. In this case I went with 25 degrees and placed the proper amount of gage blocks under the cylinder and tightened the curved clamp.

In case you don't know, one 'degree' is broken down into pieces called 'minutes' and each minute is broken down into pieces called 'seconds', like a wall clock is. Well my vise was only "three seconds off" from my target of 25 degrees. Now that's a very small amount and I can live with that because the smallest piece of dust between the vise and gage blocks can cause this error.
 

I put a second set of clamp holes on the other side because you never know what setup you'll be dealing with. And the holes on either side of the solid jaw is for a work stop, just in case I need one.
 

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