Now I need to make some pinions.
I could spend hours reading or use the internet and the vast knowledge on this site.
For the OD of my blank
OD=N+2/P for a 20 diametral pitch gear with 16 teeth the OD should be .900 inch
the root diameter
RD=N-2/P so .700 for the same gear
The whole depth of the tooth
WD=2.157/P so 0.10785 again for the same gear.
These don't line up, the WD would give a root dia of 0.6843
Whats what, is the root dia an imaginary circle and the whole depth gives clearance at the bottom of the tooth?
I could spend hours reading or use the internet and the vast knowledge on this site.
For the OD of my blank
OD=N+2/P for a 20 diametral pitch gear with 16 teeth the OD should be .900 inch
the root diameter
RD=N-2/P so .700 for the same gear
The whole depth of the tooth
WD=2.157/P so 0.10785 again for the same gear.
These don't line up, the WD would give a root dia of 0.6843
Whats what, is the root dia an imaginary circle and the whole depth gives clearance at the bottom of the tooth?
Free advice is worth exactly what you payed for it.
Greg
Greg