Sine table

[RobertHaas]

Fairly straight forward.

2 1/2 solid round bar stock, turned it to true. Bored 1 1/2" into both ends for the lugs.

Built the Lugs
here is one of them



mounted it in the mill and cut a 1" deep slot in it.

Milled a flat piece of 3/4" steel plate and inserted it in the slot. Clamped it and welded to the bar. Once cooled I used my surface cutter and ran it down to height. so at zero degrees the table resting in a T slot on the mill table is exactly 2 high.


Drilled the field 1/2" on center grid using the grid feature on the DRO. 1/4x20


Flipped it upside down and bored it for my machinists jacks foot.






I use a Browne and Sharpe machinists jack I picked up on E-bay for 20 bucks

 

[Winegrower]

Nice, but how does this work? With a sine bar there are two cylindrical surfaces that no matter the angle are always a known distance apart from contact to contact. How do you get that effect?

 

[Bob Korves]

I second that question. How do you accurately set the angle?

 

[benmychree]

It is not so much a sine table, but is a tilting table, angular setting would have to be with a sine bar and indicator on the table top.

 

[RobertHaas]

I second that question. How do you accurately set the angle?

 

[Norseman C.B.]

That looks to be rite handy, it's now on my to do list..........................

 

[Bob Korves]

View attachment 276716

OK, not a sine table then, rather an angle table. Still, nice useful fixture.