Scissor type sinebar

[stefang]

Hi folks

A sinebar to set angles accurately was on my list for a long time...so I built one 


Thats the plan:


First step was the body, it was machined from cold rolled steel, which was a bad decission, because its prone to warp when machined.

Here the material for the body is shaped to size:


Thats how it looks after a bit of milling. And there is the problem, due to the milling, the bottom surface warped 0,07mm concave. Not a big deal, it can be easiely corrected on the shaper, but still annoying.


Shaping the material for the sinebar itself, this time its hot rolled steel, as it is pretty stressfree. Note the fine finish, the shaper produces 


Drilling and reaming two holes, exactly 65mm apart:


Thats the fixture to machine the sinebar, a piece of aluminum with two M6 Threads, 65mm apart:


Machining the contour. The screw on the left was a bit in the way of the milling cutter...
But no problem, it held the part still secure in place.


Turned a bolt that acts as a pivot, and the roll which will sit on the gauge blocks. Its turned from tool steel, hardened, ground and finaly broken of the remaining material.


Finishing the surface, where the gauge blocks will go:


Short video of the machining:

not very much clearance ;)

Test fit with a 1mm gauge block (equals a settign of 0°):


Testing on the surface plate with the 1/1000 dial indicator:


I machined a Tumbscrew for the lock of the sinebar and heat-blackened it.


Also made a fence to align it on straight edges:


Then i made a small block with a dovetail...


And a bar with a slot..strange stuff


Then I cut a dovetail on the bar:


And thats how the bar, clamping block and sinebar go together. Makes adjusting the compound slide pretty easy 


And finaly a video of the achived precission, the indicator is a 1/1000mm type:

Thats all for today 

Regards,
Stefan

[dsquire]

Hi

Very nice Stephan and very well presented. That is a tool that you can be proud of. 

Cheers 

Don

[Brass_Machine]

Nice job. Like Don said... very nice presentation!

Eric

 

[Rob.Wilson]

  Thanks for sharing your sinebar Stefan   

I see your making good use of your shaper 

Rob

[DaveH]

Stefan

Very nicely made 

Well shown and photographed 

 
DaveH

[doubleboost]

Stefan

Very nice
Good clear post
I need a shaper
John

[stefang]

Thank you guys

All I need to do, is make a nice wooden case for it...

I need a shaper

Every household needs a shaper 

Regards,
Stefan

[AndreasL]

Fab as all the other posts and project you presented.

And do I hear a bit of good old heavy metal in the background? 

Hope to see a lot more posts in the near future from you.

[arnoldb]

Very nicely done Stefan 

There's one in my future too, but unfortunately not a shaper; I can only dream of that...

 , Arnold

[stefang]

And do I hear a bit of good old heavy metal in the background?

Nothing else in my shop 



No problem to do it without a shaper, only with a mill..or only with a lathe. But you loose the meditative movement of the shaper-

Regards
Stefan