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12B A-Plate Sprockets

12B Chain Sprockets

12B roller chain sprockets are manufactured for metric 12B roller chain and are manufactured in accordance with ISO, DIN, and BS228/3 standards. Our sprockets are precision manufactured from high-quality steel, directly interchange with other manufactures, and are engineered for superb performance and durability. Common styles of these sprockets include B-Hub, C-Hub, and taper bushed type but others are available upon request. The below charts show our standard sizes for 12B sprockets, if you don't see the exact sprocket you need we also custom manufacture sprockets. To get a quote on 12B sprockets or for more information please contact us and we will be happy to assist you.
12B A-Plate Sprockets:

Sprocket Size	Tooth Count	Pitch Diameter	Stock Bore	Sprocket Weight (kg)
Sprocket Size	Tooth Count	Pitch Diameter	Stock Bore	Sprocket Weight (kg)
*12A11*	11	67.62mm	14mm	0.36
*12A12*	12	73.60mm	14mm	0.42
*12A13*	13	79.60mm	14mm	0.48
*12A14*	14	85.61mm	14mm	0.54
*12A15*	15	91.63mm	14mm	0.60
*12A16*	16	97.65mm	14mm	0.68
*12A17*	17	103.67mm	14mm	0.77
*12A18*	18	109.71mm	14mm	0.85
*12A19*	19	115.74mm	14mm	0.95
*12A20*	20	121.78mm	14mm	1.08
*12A21*	21	127.82mm	16mm	1.15
*12A22*	22	133.86mm	16mm	1.24
*12A23*	23	139.90mm	19mm	1.33
*12A24*	24	145.95mm	19mm	1.47
*12A25*	25	151.99mm	19mm	1.63
*12A26*	26	158.04mm	19mm	1.72
*12A27*	27	164.09mm	19mm	1.91
*12A28*	28	170.14mm	19mm	1.99
*12A29*	29	176.19mm	19mm	2.44
*12A30*	30	182.25mm	19mm	2.48
*12A31*	31	188.30mm	19mm	2.28
*12A32*	32	194.35mm	19mm	2.62
*12A33*	33	200.41mm	19mm	2.77
*12A34*	34	206.46mm	19mm	2.91
*12A35*	35	212.52mm	19mm	3.19
*12A36*	36	218.57mm	19mm	3.21
*12A37*	37	224.63mm	19mm	3.52
*12A38*	38	230.69mm	24mm	3.67
*12A39*	39	236.74mm	24mm	3.87
*12A40*	40	242.80mm	24mm	4.00
*12A41*	41	248.86mm	24mm	4.24
*12A42*	42	254.92mm	24mm	4.53
*12A43*	43	260.98mm	24mm	4.58
*12A44*	44	267.03mm	25mm	4.99
*12A45*	45	273.09mm	25mm	5.14
*12A46*	46	279.15mm	25mm	5.33
12A47	47	285.21mm	25mm	5.70
*12A48*	48	291.27mm	25mm	5.75
*12A50*	50	303.39mm	25mm	6.45
*12A54*	54	327.63mm	32mm	7.33
*12A57*	57	345.81mm	32mm	8.11
*12A60*	60	363.99mm	32mm	9.19
*12A65*	65	394.30mm	32mm	10.65
12A70	70	424.61mm	32mm	12.45
12A72	72	436.73mm	32mm	13.22
*12A76*	76	460.98mm	32mm	14.78
*12A80*	80	485.23mm	32mm	20.75
12A84	84	509.48mm	32mm	21.78
*12A95*	95	576.17mm	32mm	23.46
12A96	96	582.23mm	32mm	23.71
12A114	114	691.36mm	32mm	28.16

12B B-Hub Sprockets:

Sprocket Size	Tooth Count	Pitch Diameter	Stock Bore	Maximum Bore	Hub Diameter	Length Thru Bore (LTB)	Sprocket Weight (kg)
Sprocket Size	Tooth Count	Pitch Diameter	Stock Bore	Maximum Bore	Hub Diameter	Length Thru Bore (LTB)	Sprocket Weight (kg)
*12B11*	11	67.62mm	12mm	32mm	47mm	35mm	0.53
*12B12*	12	73.60mm	12mm	35mm	53mm	35mm	0.67
*12B13*	13	79.60mm	12mm	38mm	59mm	35mm	0.75
*12B14*	14	85.61mm	12mm	42mm	64mm	35mm	0.91
*12B15*	15	91.63mm	12mm	45mm	70mm	35mm	1.14
*12B16*	16	97.65mm	16mm	50mm	75mm	35mm	1.27
*12B17*	17	103.67mm	16mm	52mm	80mm	35mm	1.46
*12B18*	18	109.71mm	16mm	52mm	80mm	35mm	1.69
*12B19*	19	115.74mm	16mm	60mm	90mm	35mm	1.78
*12B20*	20	121.78mm	16mm	64mm	90mm	35mm	2.10
*12B21*	21	127.82mm	20mm	64mm	100mm	40mm	2.27
*12B22*	22	133.86mm	20mm	64mm	100mm	40mm	2.38
*12B23*	23	139.90mm	20mm	67mm	100mm	40mm	2.49
*12B24*	24	145.95mm	20mm	67mm	100mm	40mm	2.62
*12B25*	25	151.99mm	20mm	67mm	100mm	40mm	2.78
*12B26*	26	158.04mm	20mm	67mm	100mm	40mm	2.89
*12B27*	27	164.09mm	20mm	67mm	100mm	40mm	3.05
*12B28*	82	170.14mm	20mm	67mm	100mm	40mm	3.12
12B29	29	176.19mm	20mm	67mm	100mm	40mm	3.30
*12B30*	30	182.25mm	20mm	67mm	100mm	40mm	3.44
*12B31*	31	188.30mm	20mm	67mm	100mm	40mm	3.50
*12B32*	32	194.35mm	20mm	67mm	100mm	40mm	3.75
*12B33*	33	200.41mm	20mm	67mm	100mm	40mm	3.82
*12B34*	34	206.46mm	20mm	67mm	100mm	40mm	3.99
*12B35*	35	212.52mm	20mm	67mm	100mm	40mm	4.10
*12B36*	36	218.57mm	20mm	67mm	100mm	40mm	4.35
*12B37*	37	224.63mm	20mm	67mm	100mm	40mm	4.64
*12B38*	38	230.69mm	25mm	70mm	107mm	40mm	4.92
*12B39*	39	236.74mm	25mm	70mm	107mm	40mm	5.15
*12B40*	40	242.80mm	25mm	70mm	107mm	40mm	5.22
*12B41*	41	248.86mm	25mm	70mm	107mm	40mm	5.51
*12B42*	42	254.92mm	25mm	70mm	107mm	40mm	5.78
*12B43*	43	260.98mm	25mm	70mm	107mm	40mm	5.90
*12B44*	44	267.03mm	25mm	70mm	107mm	40mm	6.30
*12B45*	45	273.09mm	25mm	70mm	107mm	40mm	6.34
*12B46*	46	279.15mm	25mm	70mm	107mm	40mm	6.62
*12B47*	47	285.21mm	25mm	70mm	107mm	40mm	6.80
*12B48*	48	291.27mm	25mm	70mm	107mm	40mm	7.18
*12B50*	50	303.39mm	25mm	70mm	107mm	40mm	8.01
*12B54*	54	327.63mm	32mm	70mm	110mm	45mm	9.80
*12B57*	57	345.81mm	32mm	70mm	110mm	45mm	10.10
*12B60*	60	363.99mm	32mm	70mm	110mm	45mm	11.44
*12B65*	65	394.30mm	32mm	70mm	110mm	45mm	13.12
*12B70*	70	424.61mm	32mm	70mm	110mm	45mm	14.51
*12B72*	72	436.73mm	32mm	80mm	120mm	50mm	15.50
*12B76*	76	460.98mm	32mm	80mm	120mm	50mm	17.26
*12B80*	80	485.23mm	32mm	80mm	120mm	50mm	19.00
*12B84*	84	509.48mm	32mm	80mm	120mm	50mm	21.07
*12B95*	95	576.17mm	32mm	92mm	140mm	55mm	23.83
*12B96*	96	582.23mm	32mm	92mm	140mm	55mm	26.61
*12B114*	114	691.36mm	32mm	92mm	140mm	55mm	33.98

12B Taper Bushed Sprockets:

Sprocket Size	Tooth Count	Pitch Diameter	Bushing Number	Bushing Max. Bore	Dimension (L)	Dimension (C)	Sprocket Weight (kg)	Bushing Weight (kg)
Sprocket Size	Tooth Count	Pitch Diameter	Bushing Number	Bushing Max. Bore	Dimension (L)	Dimension (C)	Sprocket Weight (kg)	Bushing Weight (kg)
*12BTB11H*	11	67.62mm	1008	25.40mm	22.23mm	46.04mm	0.27	0.14
*12BTB12H*	12	73.61mm	1008	25.40mm	22.23mm	49.21mm	0.36	0.14
*12BTB13H*	13	79.60mm	1210	31.75mm	25.40mm	62.69mm	0.41	0.27
*12BTB14H*	14	85.61mm	1210	31.75mm	25.40mm	62.69mm	0.45	0.27
*12BTB15H*	15	91.63mm	1610	41.28mm	25.40mm	70.64mm	0.54	0.41
*12BTB16H*	16	97.65mm	1610	41.28mm	25.40mm	76.20mm	0.73	0.41
*12BTB17H*	17	103.67mm	1610	41.28mm	25.40mm	82.55mm	0.82	0.41
*12BTB18H*	18	109.70mm	1610	41.28mm	25.40mm	82.55mm	0.91	0.41
*12BTB19H*	19	115.74mm	1610	41.28mm	25.40mm	82.55mm	1.00	0.41
*12BTB20H*	20	121.78mm	2012	50.80mm	31.75mm	90.47mm	1.00	0.77
*12BTB21H*	21	127.82mm	2012	50.80mm	31.75mm	90.47mm	1.18	0.77
*12BTB22H*	22	133.86mm	2012	50.80mm	31.75mm	90.47mm	1.27	0.77
*12BTB23H*	23	139.90mm	2012	50.80mm	31.75mm	90.47mm	1.27	0.77
*12BTB24H*	24	145.95mm	2012	50.80mm	31.75mm	90.47mm	1.50	0.77
*12BTB25H*	25	151.99mm	2012	50.80mm	31.75mm	90.47mm	1.74	0.77
*12BTB26H*	26	158.04mm	2012	50.80mm	31.75mm	90.47mm	1.74	0.77
*12BTB27H*	27	164.09mm	2012	50.80mm	31.75mm	90.47mm	1.80	0.77
*12BTB28H*	28	170.14mm	2012	50.80mm	31.75mm	90.47mm	2.04	0.77
*12BTB30H*	30	182.25mm	2012	50.80mm	31.75mm	90.47mm	2.32	0.77
*12BTB32*	32	194.35mm	2012	50.80mm	31.75mm	90.47mm	2.48	0.77
*12BTB35*	35	212.52mm	2012	50.80mm	31.75mm	90.47mm	2.71	0.77
*12BTB36*	36	218.57mm	2012	50.80mm	31.75mm	90.47mm	2.78	0.77
*12BTB38*	38	230.69mm	2012	50.80mm	31.75mm	90.47mm	3.36	0.77
*12BTB40*	40	242.80mm	2012	50.80mm	31.75mm	90.47mm	3.53	0.77
*12BTB42*	42	254.92mm	2012	50.80mm	31.75mm	90.47mm	3.71	0.77
*12BTB45*	45	273.09mm	2012	50.80mm	31.75mm	90.47mm	3.98	0.77
*12BTB48*	48	291.27mm	2012	50.80mm	31.75mm	90.47mm	4.24	0.77
*12BTB54*	54	327.63mm	2517	63.50mm	44.45mm	107.95mm	8.30	1.59
*12BTB57*	57	345.81mm	2517	63.50mm	44.45mm	107.95mm	8.76	1.59
*12BTB60*	60	363.99mm	2517	63.50mm	44.45mm	107.95mm	9.22	1.59
*12BTB68*	68	412.49mm	2517	63.50mm	44.45mm	107.95mm	10.45	1.59
*12BTB70*	70	424.61mm	2517	63.50mm	44.45mm	107.95mm	10.76	1.59
*12BTB72*	72	436.73mm	2517	63.50mm	44.45mm	107.95mm	11.06	1.59
*12BTB76*	76	460.98mm	2517	63.50mm	44.45mm	107.95mm	11.68	1.59
*12BTB84*	84	509.48mm	2517	63.50mm	44.45mm	107.95mm	12.91	1.59
*12BTB95*	95	576.17mm	2517	63.50mm	44.45mm	107.95mm	14.60	1.59
*12BTB96*	96	582.23mm	2517	63.50mm	44.45mm	107.95mm	14.75	1.59
*12BTB114*	114	691.36mm	2517	63.50mm	44.45mm	107.95mm	17.52	1.59

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