setting the compound angle

the 3rd dwarve

Registered User
Nov 3, 2000
685
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I need to make some centers for one of my antique ornamental lathes. It has a #6 Jarno taper so nothing is available commercially.

The calculations were easy as the taper is .050 (on the diameter) per inch. That’s a 2.864 included angle.

That’s impossible to set using the markings on the compound so I fabbed up this little fixture for my spindle gauge and though I would share it. That’s a .125” block under the five inch sine bar.

I have turned three tapers so far and they all fit well and snugged up tight right out of the lathe.

If you want to make one and need more photos or details just pm me.

D~

compound angle.jpg six inch faceplate.jpg
 

the 3rd dwarve

Registered User
Nov 3, 2000
685
25
28
Hi Trim,

I use the spindle square and sine bar to not only square the head but to set angles on the vertical mill all the time. With this little two piece jig I can now use it to easily set angles on the lathe compound. I can’t think of a more accurate way to set angles than the sine bar and gauge blocks.

D~
 

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