| The Breakroom > The Water Cooler |
| When is half of 60 not half of 60 ? |
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| DaveH:
Just to make another comment, I don't think it matters one iota if the compound is set to 30deg or 29deg. What is really important is the cutting tool is at 60deg and it is equal angles of 30deg, having one 28deg and the other 32deg although they add up to 60deg it can cause you a few problems if it is not set up correctly. :beer: Dave |
| vtsteam:
--- Quote from: DaveH on September 19, 2013, 05:53:09 PM ---Me thinks some of you think too much :lol: --- End quote --- Nah. I like thinking. Some do some don't. :lol: |
| 75Plus:
--- Quote from: DaveH on September 19, 2013, 05:53:09 PM --- Now I don't set my compound slide over to any angle I just go straight in. . These tips whether 60deg or 55deg come with both edges ground. I have paid for the two sharp edges I am damn sure I am going to use them. --- End quote --- The right edge is for cutting left hand threads. :lol: |
| malbenbut:
When setting at half angle minus one degree the back of the screw cutting tool cleans the back flank of the thread as it is cutting very little metal whilst the front of the screw cutting tool does most of the work. This means you can cut a cleaner thread as the chips don't interfere with each other, the screw deptnh is put on using the compound slide approx one and one eighth the original thread depth. MBB |
| DavidA:
... I don't think it matters one iota if the compound is set to 30deg or 29deg. What is really important is the cutting tool is at 60deg and it is equal angles of 30deg... On reflection, I am tempted to think it would matter. If you did your last cut 'straight in' (to clean up) then you would finish up with a thread that had one face at 31 degree and one face at 29 degree. Does any one else agree with that ? Dave. |
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