Sprockets

S-Series Sprockets

S-SERIES

S-Series Sprockets - for Standard Duty Belts

CAST IRON SPROCKETS

Nominal	Number	Sprocket		Pitch	Flange	Overall	Hub	Stock	Bore (In)		Approx.
Diameter	of Teeth	Number	Material	Dia.(In)¹	Width(In)	Width(In)	Dia.(In)	Bore²	Min	Max	Wt.(Lbs)
4	13	13S	Cast Iron	4.35	1 1/2	2 1/8	2½	NB	0.75	2	5
4	13	13M	Cast Iron	4.35	1 1/2	2 1/8	2½	MPB	0.75	2	4 1/2
6	18	18S	Cast Iron	6.16	1 1/2	2 1/4	3 1/2	NB	0.75	3	10 1/2
6	18	18S-LH	Cast Iron	6.16	1 3/4	1 3/4	5 3/4	MPB	1	4	12
6	18	18M	Cast Iron	6.16	1 1/2	2 1/4	3 1/2	MPB	0.75	3	10
8	23	23S	Cast Iron	7.87	1½	2 3/16	4	NB	0.75	3.5	13 1/2
8	23	23S-LH	Cast Iron	7.87	1½	2 3/16	5½	CB	3	4.5	16
10	31	31S	Cast Iron	10.65	1½	2 1/4	4 1/2	CB	1.25	3	18 1/2
10	31	31S-LH	Cast Iron	10.65	1½	2 1/4	5½	CB	3	4.5	21 1/2
12	37	37S	Cast Iron	12.68	1½	2 1/4	5	CB	1.4375	3.5	24 1/2
12	37	37S-LH	Cast Iron	12.68	1½	2 1/4	6	CB	3.437	4.5	23 1/2

PLASTIC SPROCKETS

Nominal	Number	Sprocket		Pitch	Flange	Overall	Hub	Stock	Bore (In)		Approx.
Diameter	of Teeth	Number	Material	Dia.(In)¹	Width(In)	Width(In)	Dia.(In)	Bore²	Min	Max	Wt.(Lbs)
4	13	13SP	UHMW	4.35	1¾	1¾	None	MPB	0.75	2.5	¾
6	18	18SP	UHMW	6.16	2	2	None	MPB	0.75	3.5	1 3/4
8	23	23SP	UHMW	7.87	1 3/8	2	5	MPB	0.75	3	2½
10	31	31SP	UHMW	10.65	1 3/8	2	6	MPB	0.75	4.5	4 1/4
12	37	37SP	UHMW	12.72	1 3/8	2	6	MPB	1	4.5	6 3/4

STEEL SPROCKETS

Nominal	Number	Sprocket		Pitch	Flange	Overall	Hub	Stock	Bore (In)		Approx.
Diameter	of Teeth	Number	Material	Dia.(In)¹	Width(In)	Width(In)	Dia.(In)	Bore²	Min	Max	Wt.(Lbs)
4	13	13S-MT	1045	4.35	1¾	1¾	None	MPB	0.75	2.5	6 1/2
6	18	18S-FL	1045	6.16	3/8	1 7/8	4 1/4	MPB	1	3	9 1/2
6	18	18S-MT	1045	6.16	1 3/4	1 3/4	None	MPB	1	4	12 1/2
8	23	23S-FL	1045	7.87	3/8	1 7/8	4 1/4	MPB	1	3	10 1/2
8	23	23S-FLLH	1045	7.87	3/8	1 7/8	6 1/4	MPB	3	4.5	18

STAINLESS STEEL SPROCKETS

Nominal	Number	Sprocket		Pitch	Flange	Overall	Hub	Stock	Bore (In)		Approx.
Diameter	of Teeth	Number	Material	Dia.(In)¹	Width(In)	Width(In)	Dia.(In)	Bore²	Min	Max	Wt.(Lbs)
4	13	13SS	T-303 SS	4.35	1¾	1¾	None	MPB	0.75	2.5	6 1/2
4	13	13SS-316	T-316 SS	4.35	1¾	1¾	None	NB	0.75	2.5	6 1/2
6	18	18SS	T-303 SS	6.16	1 3/4	1 3/4	None	MPB	1	4	12 1/2
6	18	18SS-316	T-316 SS	6.16	1 1/2	2 1/4	3 1/2	NB	0.75	4	10
8	24	23SS	18-8 SS	7.87	1 3/4	2	4	NB	0.75	3.5	14

¹ Add 0.375 inches to the Pitch Diameter to get the Overall sprocket Diameter. Subtract 0.375 inches from
the Pitch Diameter to get the Flange Diameter.
² Stock Bore Notations: NB = No Bore, CB = Core Bore, MPB = Minimum Plain Bore.
³ Larger bore sizes available.

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