3/4"×1/2"	链轮齿部参数mm
12A-1-2-3	节距	P	19.05
GB1244-85	滚子直径	d-∮	11.91
	元弧半径	r3	20
DIN 8188	倒涌宽度	C	2.4
	齿宽	B1	11.6
ISO/R 606	齿宽	b1	11.3
	齿宽	B1	34.1
ANSI B 29.1	齿宽	B2	56.9

齿数Z	外径de	节径dp	单排链轮simplex			双排链轮Duplex			叁排链轮Triplex
齿数Z	外径de	节径dp	dm	D1	A	dm	D2	A	dm	D3	A
8	58.1	49.78	31	12	30
9	64.0	55.70	37	12	30
10	70.0	61.64	42	12	30	42	16	45
11	76.0	67.61	46	16	35	47	16	50
12	81.9	73.60	52	16	35	53	16	50	53	20	70

13	87.9	79.59	58	16	35	59	16	50
14	94.0	85.61	64	16	35	65	20	50	65	20	70
15	100.0	91.63	70	16	35	71	20	50	71	20	70
16	106.0	97.65	75	16	35	77	20	50	77	20	70
17	112.0	103.67	80	16	35	83	20	50	83	20	70

18	118.0	109.71	80	16	35	89	20	50	89	20	70
19	124.1	115.75	80	16	35	95	20	50	95	20	70
20	130.1	121.78	80	16	35	100	20	50	100	20	70
21	136.2	127.82	90	20	40	100	20	50	100	20	70
22	142.2	122.86	90	20	40	100	20	50

23	148.2	139.90	90	20	40	110	20	50
24	154.3	145.94	90	20	40	110	20	50
25	160.3	152.00	90	20	40	120	20	50	120	25	70
26	166.4	158.04	95	20	40	120	20	50
27	172.4	194.09	95	20	40	120	20	50

28	178.5	170.13	95	20	40	120	20	50
29	184.5	176.19	95	20	40	120	20	50
30	190.6	182.25	95	20	40	120	20	50	120	25	70
31	196.6	188.31	95	20	40	120	20	50
32	202.7	194.35	95	20	40	120	20	50

33	208.8	200.40	95	20	40	120	20	50
34	214.8	206.46	95	20	40	120	20	50
35	220.9	212.52	95	20	40	120	20	50
36	266.9	218.58	100	20	40	120	20	50
37	233.0	224.64	100	20	40	120	20	50

38	239.0	230.69	100	25	40	120	25	50
39	245.1	236.75	100	25	40	120	25	50
40	251.1	242.81	100	25	40	120	25	50
42	265.2	254.93	100	25	40
45	283.3	273.10	100	25	40

48	301.5	291.27	100	25	40
50	313.6	303.39	110	25	40
54	337.9	327.64	110	25	40
57	356.1	345.81	110	25	40
60	374.2	363.99	110	25	40