Tabella di determinazione dei diametri degli ingranaggi per trasmissione con catena a rulli

Dp = diametro primitivo Dp = C x P

De = diametro esterno Dp = P / sen (180°/Z)

Di = diametro interno (fondo dente) Di = Dp – diametro del rullo

P = passo della catena De = Dp + 8/10 del diametro del rullo

Z = numero dei denti dell'ingranaggio

C = coefficiente in tabella

esempio

Si voglia determinare il diametro di un ingranaggio di 17 denti, per catena passo 1" (25,4 mm) avente il rullo del diametro di 15,88 mm. Si avrà:

Dp = 25,4 x 5,4422 = 138,23 mm

De = 138,23 mm + 12,70 mm = 150,93 mm

Di = 138,23 mm – 15,88 mm = 122,35 mm

Z	Coeffic. (C)	Z	Coeffic. (C)	Z	Coeffic. (C)	Z	Coeffic. (C)	Z	Coeffic. (C)	Z	Coeffic. (C)
5	1,7010	41	13,0635	77	24,5167	113	35,9736	149	47,4317	185	58,8902
6	2,0000	42	13,3815	78	24,8349	114	36,2919	150	47,7500	186	59,2085
7	2,3050	43	13,6995	79	25,1531	115	36,6102	151	48,0682	187	59,5267
8	2,6131	44	14,0176	80	24,4713	116	36,9285	152	48,3865	188	59,8450
9	2,9238	45	14,3356	81	25,7896	117	37,2467	153	48,7048	189	60,1634
10	3,3261	46	14,6536	82	26,1078	118	37,5650	154	49,0231	190	60,4817
11	3,5494	47	14,9717	83	26,4260	119	37,8833	155	49,3414	191	60,7999
12	3,8637	48	15,2898	84	26,7443	120	38,2015	156	49,6597	192	61,1182
13	4,1786	49	15,6079	85	27,0625	121	38,5198	157	49,9780	193	61,4366
14	4,4939	50	15,9260	86	27,3807	122	38,8381	158	50,2963	194	61,7549
15	4,8097	51	16,2441	87	27,6990	123	39,1564	159	50,6146	195	62,0732
16	5,1258	52	16,5622	88	28,0172	124	39,4746	160	50,9329	196	62,3915
17	5,4422	53	16,8803	89	28,3355	125	39,7929	161	51,2511	197	62,7097
18	5,7588	54	17,1984	90	28,6537	126	40,1112	162	51,5694	198	63,0279
19	6,0755	55	17,5166	91	28,9719	127	40,4295	163	51,8877	199	63,3464
20	6,3925	56	17,8347	92	29,2902	128	40,7478	164	52,2060	200	63,6646
21	6,7095	57	18,1529	93	29,6084	129	41,0660	165	52,5243	201	63,9829
22	7,0266	58	18,4719	94	29,9267	130	41,3843	166	52,8426	202	64,3012
23	7,3439	59	18,7892	95	30,2449	131	41,7026	167	53,1609	203	64,6195
24	7,6613	60	19,1073	96	30,5632	132	42,0209	168	53,4792	204	64,9378
25	7,9787	61	19,4255	97	30,8814	133	42,3391	169	53,7975	205	65,2562
26	8,2962	62	19,7437	98	31,1997	134	42,6574	170	54,1158	206	65,5744
27	8,6138	63	20,0619	99	31,5180	135	42,9757	171	54,4341	207	65,8927
28	8,9314	64	20,3800	100	31,8362	136	43,2940	172	54,7530	208	66,2110
29	9,2491	65	20,6982	101	32,1545	137	43,6123	173	55,0707	209	66,5294
30	9,5668	66	21,0164	102	32,4727	138	43,9306	174	55,3889	210	66,8477
31	9,8845	67	21,3346	103	32,7910	139	44,2488	175	55,7072	211	67,1659
32	10,2023	68	21,6528	104	33,1093	140	44,5671	176	56,0255	212	67,4842
33	10,5201	69	21,9710	105	33,4275	141	44,8854	177	56,3438	213	67,8025
34	10,8380	70	22,2892	106	33,7458	142	45,2037	178	56,6621	214	68,1208
35	11,1558	71	22,6074	107	34,0640	143	45,5220	179	56,9804	215	68,4394
36	11,4737	72	22,9256	108	34,3823	144	45,8403	180	57,2987
37	11,7916	73	23,2438	109	34,7006	145	46,1585	181	57,6170
38	12,1096	74	23,5620	110	35,0188	146	46,4768	182	57,9353
39	12,4275	75	23,8802	111	35,3371	147	46,7951	183	58,2536
40	12,7455	76	24,1985	112	35,6554	148	47,1134	184	58,5719

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