The obvious difference between type A and type B sprocket is that, you can find a hub on type B, but no hub on type A. ANSI sprocket works with A series roller chain, no matter it's A or B type. Please find dimensions of plate wheel sprocket 40-80(08A-16A) here.

1. Pignon de roue à plaque ANSI 40 (08A-1-2)

z	de	dp	SIMPLEX		DUPLEX		ANSI 40
z	de	dp	D1	Kg	D2	Kg	08A-1-2
8	39.3	33.18	8	0.04	10	0.07	Sprocket	millimètre
9	43.2	37.13	8	0.04	10	0.1	Rayon de dent r3	13.5
10	47.2	41.10	8	0.06	10	0.13	Largeur de rayon C	1.6
11	51.2	45.07	8	0.07	12	0.17	Largeur de dent B1	7.2
12	55.2	49.07	8	0.08	12	0.21	Largeur de dent b1	7
13	59.2	53.06	10	0.1	12	0.25	Largeur de dent B2	21.1
14	63.2	57.07	10	0.12	12	0.3	Chaîne	millimètre
15	67.2	61.09	10	0.14	12	0.36	Terrain	12.7
16	71.2	65.10	10	0.16	16	0.41	Largeur interne	7.95
17	75.2	69.11	10	0.18	16	0.47	Roller Φ	7.95
18	79.2	73.14	10	0.20	16	0.54
19	83.3	77.16	10	0.23	16	0.61
20	87.3	81.19	10	0.27	16	0.68
21	91.3	85.22	12	0.28	16	0.75
22	95.4	89.24	12	0.31	16	0.83
23	99.4	93.27	12	0.35	16	0.92
24	103.4	97.29	12	0.38	16	1.01
25	107.4	101.36	12	0.41	16	1.1
26	111.5	105.36	16	0.43	16	1.2
27	115.5	109.4	16	0.46	16	1.31
28	119.5	113.42	16	0.48	16	1.42
29	123.6	117.46	16	0.53	16	1.53
30	127.6	121.50	16	0.58	16	1.65
31	131.6	125.54	16	0.63	20	1.77
32	135.7	129.56	16	0.68	20	1.9
33	139.7	133.6	16	0.73	20	2.02
34	143.8	137.64	16	0.78	20	2.16
35	147.8	141.68	16	0.83	20	2.3
36	151.8	145.72	16	0.88	20	2.42
37	155.9	149.76	16	0.93	20	2.56
38	159.9	153.80	16	0.98	20	2.71
39	163.9	157.83	16	1.03	20	2.87
40	168.0	161.87	16	1.09	20	3.03
41	172.5	165.91	20	1.14	20	3.2
42	176.6	169.95	20	1.19	20	3.36
43	180.6	173.99	20	1.25	20	3.53
44	184.6	178.03	20	1.32	20	3.71
45	188.7	182.07	20	1.38	20	3.89
46	192.7	186.10	20	1.44	20	4.07
47	196.8	190.14	20	1.51	20	4.52
48	200.8	194.18	20	1.58	20	4.66
49	204.8	198.22	20	1.65	20	4.78
50	208.9	202.26	20	1.73	20	4.88
51	212.9	206.3	20	1.8	20	5.03
52	217.0	210.34	20	1.87	20	5.24
53	221	214.37	20	1.94	20	5.46
54	225.0	218.43	20	2.02	20	5.68
55	229.1	222.46	20	2.1	20	5.9
56	233.1	226.50	20	2.17	20	6.13
57	237.2	230.54	20	2.25	20	6.36
58	241.2	234.62	20	2.36	20	6.59
59	245.2	238.62	20	2.42	20	6.83
60	249.3	242.66	20	2.50	20	7.08
62	257.4	250.74	25	2.67	25	7.6
64	265.4	258.82	25	2.85	25	8.1
65	269.5	262.86	25	2.94	25	8.36
66	273.5	266.90	25	3.03	25	8.63
68	281.6	274.99	25	3.22	25	9.2
70	289.7	283.07	25	3.42	25	9.75
72	297.8	291.16	25	3.62	25	10.33
75	309.9	303.27	25	3.94	25	11.24
76	313.9	307.33	25	4.05	25	11.55
78	322.0	315.40	25	4.27	25	12.25
80	330.1	323.48	25	4.50	25	12.9
85	350.3	343.69	25	5.62	25	14.55
90	370.5	363.90	25	6.31	25	16.36
95	390.7	384.11	25	7.05	25	18.28
100	410.9	404.31	25	7.82	25	20.3
110	451.4	444.74	25	9.50	25	24.67
114	467.5	460.90	25	10.21	25	26.57
120	491.8	485.16	25	11.32	25	29.46
125	512.0	505.37	25	12.31	25	32

2. Pignon de roue à plaque ANSI 50 (10A-1-2)

z	de	dp	SIMPLEX		DUPLEX		ANSI 50
z	de	dp	D1	Kg	D2	Kg	10A-1-2
8	48.4	41.48	10	0.06	10	0.15	Sprocket	millimètre
9	53.3	46.42	10	0.09	10	0.21	Rayon de dent r3	17
10	58.3	51.37	10	0.11	12	0.27	Largeur de rayon C	2
11	63.2	56.34	12	0.14	12	0.34	Largeur de dent B1	8.7
12	68.2	61.34	12	0.17	16	0.42	Largeur de dent b1	8.4
13	73.2	66.32	12	0.20	16	0.51	Largeur de dent B2	26.5
14	78.2	71.34	12	0.23	16	0.60	Chaîne	millimètre
15	83.2	76.36	12	0.27	16	0.70	Terrain	15.875
16	88.3	81.37	12	0.31	16	0.82	Largeur interne	9.53
17	93.3	86.39	12	0.36	16	0.94	Roller Φ	10.16
18	98.3	91.42	14	0.41	16	1.06
19	103.3	96.45	14	0.46	16	1.20
20	108.4	101.49	14	0.51	16	1.34
21	113.4	106.52	16	0.57	16	1.48
22	118.4	111.55	16	0.62	20	1.64
23	123.5	116.58	16	0.68	20	1.80
24	128.5	121.62	16	0.75	20	1.98
25	133.6	126.66	16	0.82	20	2.17
26	138.6	131.70	20	0.88	20	2.33
27	143.6	136.75	20	0.95	20	2.53
28	148.7	141.78	20	1.03	20	2.74
29	153.7	146.83	20	1.11	20	2.96
30	158.8	151.87	20	1.19	20	3.18
31	163.8	156.92	20	1.28	20	3.41
32	168.9	161.95	20	1.36	20	3.66
33	173.9	167.00	20	1.45	20	3.90
34	178.9	172.05	20	1.55	20	4.16
35	184.0	177.10	20	1.64	20	4.42
36	189.0	182.15	20	1.73	20	4.70
37	194.1	187.20	20	1.83	20	4.98
38	199.1	192.24	20	1.94	20	5.26
39	204.2	197.29	20	2.05	20	5.56
40	209.2	202.34	20	2.16	20	5.87
41	215.8	207.39	20	2.28	20	6.17
42	220.8	212.44	20	2.39	20	6.46
43	225.9	217.49	20	2.50	20	6.80
44	230.9	222.53	20	2.63	20	7.13
45	236.0	227.58	20	2.75	20	7.47
46	241.0	232.63	20	2.88	20	7.83
47	246.1	237.68	20	3.00	20	8.19
48	251.1	242.73	20	3.14	20	8.55
49	256.2	247.78	20	3.28	20	8.91
50	261.2	252.82	20	3.42	20	6.32
51	266.3	257.87	20	3.56	20	9.72
52	271.3	262.92	20	3.70	20	10.11
53	276.4	267.97	20	3.85	20	10.52
54	281.4	273.03	20	4.00	20	10.94
55	286.5	278.08	20	4.15	20	11.36
56	291.5	283.13	25	4.30	20	11.80
57	296.6	288.18	25	4.46	25	12.24
58	301.6	293.23	25	4.62	25	12.68
59	306.7	298.27	25	4.78	25	13.15
60	311.7	303.32	25	4.95	25	13.61
62	321.8	313.43	25	5.30	25	14.56
64	331.9	323.53	25	5.65	25	15.51
65	337.0	328.58	25	5.83	25	16.05
68	352.1	343.74	25	6.40	25	17.59
70	362.2	353.84	25	6.79	25	18.70
72	372.3	363.95	25	7.19	25	19.81
75	387.5	379.09	25	7.81	25	21.54
76	392.5	374.16	25	8.02	25	22.14
78	402.6	394.25	25	8.46	25	23.37
80	412.7	404.35	25	8.91	25	24.60
85	438.0	429.62	30	10.06	25	28.00
90	463.3	254.88	30	11.30	25	31.25
95	488.5	480.14	30	12.61	25	34.90
100	513.8	505.40	30	13.99	25	38.75
110	564.3	555.92	30	16.97	25	46.73
114	584.5	576.13	30	19.98	25	50.60
120	614.8	606.44	30	22.17	25	56.16
125	640.1	631.71	30	24.08	25	61.00

3. Pignon de roue à plaque ANSI 60 (12A-1-2)

z	de	dp	SIMPLEX		DUPLEX		ANSI 60
z	de	dp	D1	Kg	D2	Kg	12A-1-2
8	58.1	49.78	10				Sprocket	millimètre
9	64.0	55.70	10				Rayon de dent r3	20
10	70.0	61.64	10		12		Largeur de rayon C	2.4
11	76.0	67.61	12		16		Largeur de dent B1	11.7
12	81.9	76.60	12		16		Largeur de dent b1	11.3
13	87.9	79.59	14	0.35	16		Largeur de dent B2	34.1
14	94.0	85.61	14	0.41	16		Chaîne	millimètre
15	100.0	91.63	14	0.48	16		Terrain	19.05
16	106.0	97.65	14	0.55	20		Largeur interne	12.7
17	112.0	103.67	14	0.63	20		Roller Φ	11.91
18	118.0	109.71	14	0.71	20
19	124.1	115.75	14	0.83	20
20	130.1	121.78	14	0.92	20
21	136.2	127.82	16	0.99	20
22	142.2	133.86	16	1.09	20
23	148.2	139.90	16	1.20	20
24	154.3	145.94	16	1.31	20
25	160.3	152.00	16	1.43	20
26	166.4	158.04	16	1.56	20
27	172.4	164.09	16	1.68	20
28	178.5	170.13	16	1.82	20
29	184.5	176.19	16	1.96	20
30	190.6	182.25	16	2.10	20
31	196.6	188.31	20	2.24	20
32	202.7	194.35	20	2.39	20
33	208.8	200.40	20	2.55	20
34	214.8	206.46	20	2.71	20
35	220.9	212.52	20	2.88	20
36	226.9	218.58	20	3.06	25
37	233.0	224.64	20	3.25	25
38	239.0	230.69	20	3.42	25
39	245.1	236.75	20	3.63	25
40	251.1	242.81	20	3.85	25
41	259.1	248.87	25	4.01	25
42	265.2	254.93	25	4.19	25
43	271.3	260.98	25		25
44	277.3	267.03	25		25
45	283.3	273.10	25		25
46	289.4	279.16	25		25
47	295.5	285.21	25		25
48	301.5	291.27	25		25
49	307.6	297.33	25		25
50	313.6	303.39	25		25
51	319.7	309.45	25		25
52	325.8	315.50	25		25
53	331.8	321.56	25		25
54	337.9	327.64	25		25
55	343.9	333.70	25		25
56	350.0	339.75	25		25
57	356.1	345.81	25		25
58	362.1	351.87	25		25
59	368.2	357.93	25		25
60	374.2	363.99	25		25
62	386.4	376.12	25		30
64	398.5	388.24	25		30
65	404.5	394.29	25		30
66	410.6	400.35	25		30
68	422.7	412.49	25		30
70	434.9	424.60	25		30
72	447.0	436.74	25		30
75	465.2	454.91	25		30
76	471.2	460.99	25		30
78	483.3	473.10	25		30
80	495.5	485.22	25		30
85	525.8	515.55	25		30
90	556.1	545.86	25		30
95	586.4	576.17	25		30
100	616.7	606.47	25		30
110	677.4	667.11	25		30
114	701.6	691.36	25		30
120	738.0	727.74	25		30
125	768.3	758.05	25		30

4. Pignon de roue à plaque ANSI 80 (16A-1-2)

z	de	dp	SIMPLEX		DUPLEX		ANSI 80
z	de	dp	D1	Kg	D2	Kg	16A-1-2
8	77.9	66.37	16		20		Sprocket	millimètre
9	85.8	74.27	16		20		Rayon de dent r3	27
10	93.8	82.19	16		20		Largeur de rayon C	3.2
11	101.7	90.14	16		20		Largeur de dent B1	14.7
12	109.7	98.14	16	0.77	20		Largeur de dent b1	14.1
13	117.7	106.12	16	0.91	20		Largeur de dent B2	43.4
14	125.7	114.15	16	1.01	20		Chaîne	millimètre
15	133.7	122.17	16	1.22	20		Terrain	25.4
16	141.8	130.20	20	1.43	25		Largeur interne	15.88
17	149.8	138.22	20	1.64	25		Roller Φ	15.88
18	157.8	146.28	20	1.85	25
19	165.9	154.33	20	2.08	25
20	173.9	162.38	20	2.12	25
21	182.0	170.43	20	2.45	25
22	190.1	178.48	20	2.84	25
23	198.1	186.53	20	3.13	25
24	206.2	194.59	20	3.42	25
25	214.2	202.66	20	3.73	25
26	222.3	210.72	20	4.05	25
27	230.4	218.79	20	4.38	25
28	238.4	226.85	20	4.73	25
29	246.5	234.92	20	5.09	25
30	254.6	243.00	20	5.46	25
31	262.6	251.08	25	5.83	25
32	270.7	259.13	25	6.21	25
33	278.8	267.21	25	6.63	25
34	286.9	275.28	25	7.06	25
35	294.9	283.36	25	7.49	25
36	303.0	291.44	25	8.01	25
37	311.1	299.51	25	8.45	25
38	319.2	307.59	25	8.88	25
39	327.2	315.67	25		25
40	335.3	323.73	25		25
41	345.6	331.82	25		25
42	353.7	339.90	25		25
43	361.7	347.98	25		25
44	369.8	356.06	25		25
45	377.9	364.12	25		25
46	386.0	372.21	25		25
47	394.1	380.29	25		25
48	402.1	388.36	25		25
49	410.2	396.44	25		25
50	418.3	404.52	25		25
51	426.5	412.60	25		30
52	434.5	420.67	25		30
53	442.5	428.75	25		30
54	450.6	436.85	25		30
55	458.7	444.93	25		30
56	466.8	453.01	25		30
57	474.9	461.07	25		30
58	482.9	469.16	25		30
59	491.0	477.24	25		30
60	499.1	485.32	25		30
62	515.3	501.50	30		30
64	531.4	517.65	30		30
65	539.5	525.73	30		30
66	547.6	533.80	30		30
68	563.8	549.98	30		30
70	579.9	566.14	30		30
72	596.1	582.32	30		30
75	620.3	606.35	30		30
76	628.4	614.65	30		30
78	644.6	630.80	30		30
80	660.7	646.96	30		30
85	701.2	687.04	30		30
90	741.6	727.81	30		30
95	782.0	768.22	30		30
100	822.4	808.63	30		30
110	903.3	889.48	30		30
114	935.6	921.81	30		40
120	984.1	970.33	30		40
125	1024.5	1010.73	30		40