I have a 2 stage planetary gearbox for which I need to know the geometric specs of each of the gears, the problem is that the formulas don't seem to give me standard results.
For one sun gear of the first stage I measured the outer diameter with a caliper and got:
OD 16mm
Number Teeth 24
Then, applying the formulas I got:
PCD 14.76923077
MOD 0.615384615
For which the closest standard module to this result would be 0.6, but I'm getting 0.615, I don't know if there are non-standard gears for which the module can be this result.
Then, for calculating the base and root circle diameters I tried the 2 most common pressure angles, but when I drew them on a scaled picture I took of the gear, they don't seem to be correct.
Alpha 20, BCD20 13.87853717
Alpha 14.5, BCD14.5 14.29879592
RCD 13.23076923
My main question is that of the module of the gear, which I'm not getting a standard result, how could I find out? Thanks.
For one sun gear of the first stage I measured the outer diameter with a caliper and got:
OD 16mm
Number Teeth 24
Then, applying the formulas I got:
PCD 14.76923077
MOD 0.615384615
For which the closest standard module to this result would be 0.6, but I'm getting 0.615, I don't know if there are non-standard gears for which the module can be this result.
Then, for calculating the base and root circle diameters I tried the 2 most common pressure angles, but when I drew them on a scaled picture I took of the gear, they don't seem to be correct.
Alpha 20, BCD20 13.87853717
Alpha 14.5, BCD14.5 14.29879592
RCD 13.23076923
My main question is that of the module of the gear, which I'm not getting a standard result, how could I find out? Thanks.