Hey, folks:
I'm making myself a three-knurl hand knurler as follows:
20160322_165740-1.jpg
I plan to machine the middle and lower steel cross pieces to accept the knurl wheels and pass pins through both cross pieces to act as axles for the three knurl wheels.
But it occurs to me that the two upper wheels might need to be separated by a specific distance in order to generate proper diamond patterns. Am I right about this? If so, how far apart must they be?
The two upper wheels are 3/4 inch in diameter. The lower wheel is smaller, at 5/8 inch. All three are 14 tpi wheels.
I don't think the smaller size of the lower wheel is a problem, but it I'm wrong, please let me know. On the other hand, I do wonder whether the third wheel is a problem for a different reason -- namely that the pattern of the metal it deforms will not be congruent with the pattern generated by the two upper wheels. Am I right about this? If so, is there a solution?
If not, I may have wasted some time with this knurler. Still...
Thanks in advance for any help you can give me.