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| How do I set and turn very small internal taper (ER11) |
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| PekkaNF:
Hello, My answer is "difficult". Need a little push (or maybe a kick?). I may need to make an ER11 collet cavity and I'm having a little trouble setting taper angle correctly. I did read this: http://madmodder.net/index.php?topic=1993.0 Just out of shear gratitude I'll bow down until my forehead makes a loud bump with floor boards. :clap: And it seems to work well on MT3 and greater objects. How about miniscule ER collet with 8 decree taper? How on dumpling do I set over compound? First instinct was to mount ER collet on good arbor and dial it in to compound. I don't believe it even to try. Second tought: Good arbor and sinebar. Should buy both or least sine bar. This is on "To buy" and "to learn to use" list. Would need to make fitting gauges as well. Third idea: Harrold Hall disc method. Is this my best bet? A bit labor intensive, but probably the way to do it. Or is there a way better idea on the MadModder Skonkworks? Some :proj: might know. Then there is ofcourse matter of doing a very small boring bar to reach dark corners down to 7 mm ID. Or is there a über reamer to do this eeeeaazzyy and everybody is LOLROF for my musings? Thanks, PekkaNF Pose: |
| John Stevenson:
Rough bore to size then use a previously made D bit to finish. you will have far more control over making a male D bit than a female hole. John S. |
| DaveH:
Hello PekkaNF --- Quote from: PekkaNF on May 11, 2011, 02:41:35 PM --- First instinct was to mount ER collet on good arbor and dial it in to compound. I don't believe it even to try. Thanks, PekkaNF --- End quote --- It works well I use this method all the time. It gives you a very good starting point. Then check the taper with a collet - and make an ajustment if required. The same as John in his post. DaveH |
| PekkaNF:
Thanks. I probably have to learn to make D-bit then. It would be my first one. I probably have to find another material to my spindles then as-well. Darn. Pretty soon I'll be making tools to make tools and to get started I probably have to buy four jaw lathe chuck, which I have been trying to avoid buying...or something like sine bar that I just know I'm going to need but have no idea how to use it. PekkaNF |
| dickda1:
John, dumb question. Do you mean that you create a tapered D bit? -Dick |
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