moonlight machine
Diamond
- Joined
- Nov 19, 2007
- Location
- marysville ohio
Boring a 4" diameter 4" deep, First drilled to 2 1/4 then bore with a 1" diameter solid carbide boring bar wit a new insert. Not pushing it, .125 DOC. .004 taper in 4". Back the tool out, leaves a nice coil spring type groove that fades away before the tool is all the way out. If I do another cut without changing the diameter on the cross feed the bore has no taper, as in dead straight, 0 deviation on the dial bore gage. been a while since I checked level but if it was out why would it bore true the second time around?