[Arm] GT2 Pulley

teeth	2*pi*r	r	r'=r-0.254	r"=r-0.75	r"+rc(0.555)	r'-rd(0.15)	x=((r'-0.75+0.555)^2      +(r'-0.15)^2       -(0.555+0.15)^2)     /     (2*(r'-0.75+0.555)	acos(x/(r'-0.15))
10	20	3.183	2.929	2.179	2.734	2.779	2.6886	14.664
11	22	3.501	3.247	2.497	3.052	3.097	3.0163	13.139
12	24	3.820	3.566	2.816	3.371	3.416	3.3423	11.902
13	26	4.138	3.884	3.134	3.689	3.734	3.6669	10.878
14	28	4.456	4.202	3.452	4.007	4.052	3.9906	10.016
15	30	4.775	4.521	3.771	4.326	4.371	4.3134	9.281
16	32	5.093	4.839	4.089	4.644	4.689	4.6357	8.647
17	34	5.411	5.157	4.407	4.962	5.007	4.9574	8.094
18	36	5.730	5.476	4.726	5.281	5.326	5.2787	7.607
19	38	6.048	5.794	5.044	5.599	5.644	5.5997	7.176
20	40	6.366	6.112	5.362	5.917	5.962	5.9204	6.791
21	42	6.685	6.431	5.681	6.236	6.281	6.2408	6.445
22	44	7.003	6.749	5.999	6.554	6.599	6.5611	6.133
23	46	7.321	7.067	6.317	6.872	6.917	6.8811	5.849