78-Series Sprockets

78 series engineer class sprockets are used for a wide verity of chain sizes. For cast sprockets, these sizes include 75, 78, 88, H78, H79, BRH, 188, C188 conveyor chain, SS188, 78, MXS882, MSR1288, 433-1/2, H74, H75, H78A rooftop chain, H78B rooftop chain, H78SR, BRH188 conveyor chain, MW188RT, 488 pintle chain, SS578, and 81X. For steel sprockets, these sizes include 78, H74, 75, H75, H78LR, H75RT, H78SR, H79, 88, 188, S188, S78, R588, RR588, R778, RR778, 988, IS880, 87R, IS881, 81X, IS882, 433-1/2, LXS881, LXS886, US881, LXS887, LXS882, 488 pintle chain, XS578, SS188, C188 conveyor chain, US278R, US882, 578R, and 588R. These sprockets are typically supplied as cast material but we can also supply them as steel for longer operation.

Cast 78-Series Sprockets

Note: Tooth Face at Pitch Line: 0.937"/ Roller Diameter: 0.875"

Sprocket Size	Tooth Count	Style	Pitch Diameter	Hub Diameter	Length Thru Bore	Maximum Bore	Weight (LBS)
78C5	5	C	4.44"	2.50"	2.50"	1.19"	5
78C6	6	C	5.22"	3.50"	2.75 "	1.44"	6
78C7	7	C	6.01"	4.00"	3.00"	2.44"	11
78C8	8	C	6.82"	4.75"	3.12"	2.81"	15
78C9	9	C	7.63"	5.25"	3.88"	3.25"	16
78C10	10	C	8.44"	5.25"	3.88"	3.25"	19
78C11	11	C	9.26"	5.25"	3.88"	3.25"	23
78C12	12	C	10.08"	6.00"	3.88"	3.25"	28
78C13	13	C	10.90"	6.00"	4.50"	3.31"	36
78C14	14	C	11.72"	6.00"	4.50"	3.31"	39
78C15	15	C	12.55"	6.00"	4.50"	3.31"	40
78C16	16	C	13.37"	6.00"	4.50"	3.31"	53
78C17	17	C	14.20"	6.00"	4.50"	3.31"	55
78C18	18	C	15.02"	6.00"	4.50"	4.06"	61
78C19	19	C	15.85"	6.50"	5.38"	4.06"	64
78C20	20	C	16.68"	6.50"	5.38"	4.06"	67
78C21	21	C	17.50"	6.50"	5.38"	4.06"	79
78C22	22	C	18.33"	6.50"	5.38"	4.06"	89
78C23	23	C	19.16"	6.50"	5.38"	4.06"	91
78C24	24	C	19.99"	7.00"	5.38"	4.06"	99
78C25	25	C	20.81"	7.00"	5.38"	4.06"	107
78C26	26	C	21.64"	7.00"	5.38"	4.06"	111
78C27	27	C	22.47"	7.00"	5.38"	4.06"	112
78C28	28	C	23.30"	7.00"	5.38"	4.06"	114
78C29	29	C	24.05"	7.00"	5.38"	4.06"	116
78C30	30	C	24.96"	7.00"	5.38"	4.06"	119
78C31	31	C	25.79"	7.00"	5.38"	4.06"	123
78C32	32	C	26.62"	7.00"	5.38"	4.06"	130
78C33	33	C	27.38"	7.00"	5.38"	4.06"	136
78C34	34	C	28.28"	7.00"	5.38"	4.06"	141
78C35	35	C	29.11"	7.00"	5.38"	4.06"	146
78C36	36	C	29.93"	7.00"	5.38"	4.06"	153
78C38	38	C	31.60"	7.00"	5.38"	4.06"	162
78C39	39	C	32.42"	7.00"	5.38"	4.06"	170
78C40	40	C	33.25"	7.25"	6.75"	4.62"	176
78C41	41	C	34.08"	7.25"	6.75"	4.62"	180
78C42	42	C	34.91"	7.25"	6.75"	4.62"	193
78C43	43	C	35.65"	7.25"	6.75"	4.62"	197
78C44	44	C	36.57"	7.25"	6.75"	4.62"	202
78C45	45	C	37.31"	7.25"	6.75"	4.62"	212
78C46	46	C	38.23"	7.25"	6.75"	4.62"	221
78C48	48	C	38.89"	7.25"	6.75"	4.62"	449
78C54	54	C	44.87"	7.25"	6.75"	4.62"	265

Steel 78-Series Sprockets

Note: Pitch: 2.609"/ Plate Thickness: 0.875"/ Roller Diameter: 0.875"

ket Size	Tooth Count	Style	Pitch Diameter	Stock Bore	Maximum Bore	Hub Diameter	Length Through Bore	Weight (LBS)
78C8	8	C	6.82"	0.938"	3.25	4.75	3.125	21
78C9	9	C	7.63"	1.25"	3.438"	5.25"	3.875"	29
78C10	10	C	8.44"	1.25"	3.438"	5.25"	3.875"	31
78C11	11	C	9.26"	1.25"	3.438"	5.25"	3.875"	34
78C12	12	C	10.08"	1.25"	3.438"	5.25"	3.875"	37
78C13	13	C	10.90"	1.25"	3.75"	5.5"	4.5"	46
78C14	14	C	11.72"	1.25"	3.75"	5.5"	4.5"	49
78C15	15	C	12.55"	1.5"	3.75"	5.5"	4.5"	53
78C17	17	C	14.20"	1.5"	3.75"	5.5"	4.5"	62
78C19	19	C	15.85"	1.5"	4.5"	6.5"	5.375"	90
78C21	21	C	17.51"	1.5"	4.5"	6.5"	5.375"	101
78C24	24	C	19.99"	1.5"	4.5"	6.5"	5.375"	119
78C25	25	C	20.82"	1.5"	4.5"	6.5"	5.375"	124
78C28	28	C	23.31"	1.5"	4.5"	6.5"	5.375"	132
78C30	30	C	24.96"	1.5"	4.5"	6.5"	5.375"	150
78C35	35	C	29.11"	1.5"	4.5"	6.5"	5.375"	170
78C40	40	C	33.25"	1.5"	4.938"	7.25"	6.75"	226
78C42	42	C	34.91"	1.5"	4.938"	7.25"	6.75"	240
78C46	46	C	38.31"	1.5"	4.938"	7.25"	6.75"	258
78C54	54	C	44.87"	1.5"	4.938"	7.25"	6.75"	368
78C60	60	C	49.85"	1.5"	4.938"	7.25"	6.75"	388
78A8	8	A	6.82"	0.938"	-	-	-	9.0
78A9	9	A	7.63"	1.25"	-	-	-	11.3
78A10	10	A	8.44"	1.25"	-	-	-	13.9
78A11	11	A	9.26"	1.25"	-	-	-	16.7
78A12	12	A	10.08"	1.25"