- Joined
- Dec 29, 2013
- Messages
- 321
I needed to cut a couple of precision tapers for another project, so I wanted to use a sine bar to be able to accurately set the angles.
This was just a piece of 2" aluminum flat bar I had in my junk pile. I milled a 5/8 slot down the center and then beveled the end to make it look nicer and to prevent the corners from interfering with the inidicator.
To use it, I clamp the bar under my BXA qctp and put the gage block stack between the compound and the bar. After that, just sweep and bump until the indicator stops moving (or until you think you are close enough and call it a day ) Using a 5" sinebar, a .001" difference over the length of the bar equals 0.0115 degrees or 0.6875 minutes of arc.
This was just a piece of 2" aluminum flat bar I had in my junk pile. I milled a 5/8 slot down the center and then beveled the end to make it look nicer and to prevent the corners from interfering with the inidicator.
To use it, I clamp the bar under my BXA qctp and put the gage block stack between the compound and the bar. After that, just sweep and bump until the indicator stops moving (or until you think you are close enough and call it a day ) Using a 5" sinebar, a .001" difference over the length of the bar equals 0.0115 degrees or 0.6875 minutes of arc.