09-14-2012, 06:49 AM
220px-Worm_Gear.gif (Size: 226.06 KB / Downloads: 131) Rick Thanks for the quick reply with the picture.
It clarifies the words I was not understanding.
My worm has a RH pitch and the RT is graduated for CW rotation so the final dial movements in dialing in an angle will always be in the CW direction. This negates the vernier scale on both sides of the Zero.
Your dial picture shows for a CCW rotation, otherwise its the same.
I was going to put the 10th line on the vernier scale but its redundant, no one will ever looks for it. There might be some benefits to it so I will include it when I am scribing.
Thanks again for the feedback Claude
claudef, proud to be a member of Metalworking Forum since Mar 2012.