Those narrow 3" sine bars are great to use with the vise.I think the dimples are for trammel points to measure distance, then you can use SIN to set the angle using... your table slots and gauge blocks, I assume. Seems wonky to me, but it's Kurt, so it must be amazing, right? You can actually use a sine bar in a vise to accomplish the same thing, where the envelope allows, which makes these an unnecessary tool, and I bet that's what's really at the heart of it. No, I didn't look up the price, I know better after looking up hard jaws than to ever ask for the Kurt retail price sheet again.
Have you got any white tail deer in Red Deer?Yes, Jeff is probably right - that they would work great on a fixture plate. I can tell you that they work great as the 0 degree and 90 degree alignment keys, they are easy to pop out (to set the vise to whatever angle you want - a couple pretty standard methods available). I tried a bunch of combinations of the different hole positions and did not land on any reasonable angle (ie. 30 / 45 / 60 degree). I use these vises on the VMC so it feels like a pretty unusual situation where the vise would need to be swung to some angle (if I want an angle I’ll just punch in the start and end points).
I generally run a dial along the jaw anyway (sometimes it will be right on, sometimes off at most 0.002”). Personally I like having keys as part of securing the vise - the keys pushed against the back side slot and I try to direct the main cutting force towards the fixed jaw (with a couple purpose built 5/8” Tbolts, I’ve never had a vise shift).
I have no idea why they are called sine keys, but as keys to facilitate vise position they work great. A feature that I like is the keys are very easy to remove so the vises go nicely into their little storage location. My old Anglok, with the fixed keys, has to live on some scraps of wood when not in use (obviously not a big deal - just my OCD nature).
Just coming back and saw quite a lot of wildlife up there !Have you got any white tail deer in Red Deer?
The "dimples" look like drilled centers to me. Since they basically are pushed into the holes in the bottom of the vise, and aren't held in place with any sort of fastener, I don't think using them for trammel points would do you much good. As for price, they're $58 per pair direct from Kurt( which is probably the most expensive way to buy them ). No way in hell I would machine, heat treat, and grind to dimension( or hard mill/turn ) for that price! Same with their jaws. Plain Jane jaws are like $50 a piece. I've machined and ground my own jaws, and I wouldn't do it for that price either!I think the dimples are for trammel points to measure distance, then you can use SIN to set the angle using... your table slots and gauge blocks, I assume. Seems wonky to me, but it's Kurt, so it must be amazing, right? You can actually use a sine bar in a vise to accomplish the same thing, where the envelope allows, which makes these an unnecessary tool, and I bet that's what's really at the heart of it. No, I didn't look up the price, I know better after looking up hard jaws than to ever ask for the Kurt retail price sheet again.
If you cancel the hypotenuse on 1.) and 2.) you'll end up with a tangent key