H 型 （节距=12.70mm ）
规格	齿数	节径 d	外径 do	档边直径 df	档边内径 db	档边厚度 h
14H	14	56.6	55.22	64	48	1.2
15H	15	60.64	59.27	68	52	1.2
16H	16	64.68	63.31	73	55	1.2
17H	17	68.72	67.35	73	55	1.2
18H	18	72.77	71.39	80	60	1.2
19H	19	76.81	75.44	84	64	1.2
20H	20	80.85	79.48	84	64	1.2
21H	21	84.89	83.52	90	70	1.2
22H	22	88.94	87.56	98	78	1.2
23H	23	92.98	91.61	98	78	1.2
24H	24	97.02	95.65	102	83	1.2
25H	25	101.06	99.69	109	90	1.2
26H	26	105.11	103.73	109	90	1.2
27H	27	109.15	107.78	115	95	1.2
28H	28	113.19	111.82	123	103	1.2
30H	30	121.28	119.9	131	111	1.5
32H	32	129.36	127.99	139	110	1.5
34H	34	137.45	136.07	152	125	1.5
36H	36	145.53	144.16	153	133	1.5
38H	38	153.62	152.24	164	134	1.5
40H	40	161.7	160.33	169	135	1.5
42H	42	169.79	168.41
44H	44	177.87	176.5
46H	46	185.96	184.58
48H	48	194.04	192.67
50H	50	202.13	200.75
60H	60	242.55	241.18
72H	72	291.06	289.69
84H	84	339.57	338.2
96H	96	388.08	386.71