Author Topic: sine bar protractor  (Read 469 times)

Offline sbwhart

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sine bar protractor
« on: February 13, 2018, 06:26:30 AM »
I made this sine bar protractor a few weeks ago



To use all you have to do is zero your height gauge on it



Then as the distance between centres is 100mm simply multiply the sine of the desired angle by 100 to give you the height to set the bar to using the height gauge.



Then use it to set up your work piece



Stew
« Last Edit: February 13, 2018, 06:31:00 AM by sbwhart »
A little bit of clearance never got in the way

Offline 10KPete

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Re: sine bar protractor
« Reply #1 on: February 13, 2018, 06:38:05 AM »
That's just too handy to be legal.... gonna  have to make one!

Thanks for posting that neat tool.

Pete
Craftsman, Tinkerer, Curious Person.
Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Offline Andy

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Re: sine bar protractor
« Reply #2 on: February 13, 2018, 11:12:42 AM »
Interesting device.
 How does the pivot bolt thing work? Clamping or resistant type fit
 Looks like a hex counter sunk bolt with a slot cut in it   :shrug:

Online b.lindsey

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Re: sine bar protractor
« Reply #3 on: February 13, 2018, 11:36:53 AM »
Very elegant Stew. Filing this one away for future reference!!

Bill

Offline bent

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Re: sine bar protractor
« Reply #4 on: February 13, 2018, 08:37:33 PM »
Not seeing the pivot lock either, could you post a detail sketch?  Like the idea though, thanks.

Offline sbwhart

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Re: sine bar protractor
« Reply #5 on: February 14, 2018, 06:55:02 AM »
Interesting device.
 How does the pivot bolt thing work? Clamping or resistant type fit
 Looks like a hex counter sunk bolt with a slot cut in it   :shrug:
[/quote



Its just a pinch clamp the drawings attached so you can see how it works

Stew
A little bit of clearance never got in the way

Offline Andy

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Re: sine bar protractor
« Reply #6 on: February 14, 2018, 10:48:54 AM »
Thanks Stew,  I see what you did now  :slap:

Offline bent

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Re: sine bar protractor
« Reply #7 on: February 14, 2018, 04:37:24 PM »
Thanks Stew.