08-17-2014, 06:33 AM
(08-16-2014, 10:36 PM)PixMan Wrote: Nice work on the photographic parts, a subject near and dear to my heart. What material did you use and do you have a way of getting it to a flat black color? Shiny bits inside a camera can easily cause flare in the image (loss of contrast) at the least, and at worst a ghost image of the ring.
If I was threading that I wouldn't hesitate to make it from a single piece and finally get some use out of my drop-head threading insert holders. These are holders that can be used upside down and thread from left to right to avoid crashing into the shoulder. For a 0.5mm thread you would need a thread relief groove of no more than 0.3mm width at the shoulder to start the tool.
Thanks, Pixman. The flanges are made from C360 brass per request. i think to compliment the original material used to make the lenses. Painting the insides surfaces flat black may be part of the project I just haven't received those instructions yet.
Thanks for the info about the drop-head threading insert holders and turning from left to right. I had thought about turning them from left to right but ultimately decided on the method I used. Without being able to disengage the half nut I just thought it will be easier as 2 pieces. I was able to use the core from the first flange as the material so it really didn't add to material cost. If I am asked to do another one I will try it your way.
Thanks, James
12" Atlas Lathe - Rockwell 21-100 Vertical Mill - Burke #4 Horizontal Mill