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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. The below chart shows the standard tooth counts, as well as dimensions for each size. To get a quote on the sprocket or chain, please contact us or fill out the below request form and we will be happy to assist you.
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"
Sprocket 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" - - - 19.8
78A13 13 A 10.90" 1.25" - - - 23.0
78A14 14 A 11.72" 1.25" - - - 27.0
78A15 15 A 12.55" 1.5" - - - 30.0
78A17 17 A 14.20" 1.5" - - - 39.0
78A19 19 A 15.85" 1.5" - - - 50.0
78A21 21 A 17.51" 1.5" - - - 61.0
78A24 24 A 19.99" 1.5" - - - 79.0
78A25 25 A 20.82" 1.5" - - - 84.0
78A28 28 A 23.31" 1.5" - - - 105.0
78A30 30 A 24.96" 1.5" - - - 123.0
78A35 35 A 29.11" 1.5" - - - 166.0
78A40 40 A 33.25" 1.5" - - - 216.0
78A42 42 A 34.91" 1.5" - - - 240.0
78A46 46 A 38.31" 1.5" - - - 286.0
78A54 54 A 44.87" 1.5" - - - 302.0
78A60 60 A 49.85" 1.5" - - - 322.0




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Requesting 78-Series Sprockets

To get a quote on 78-Series Sprocket simply fill out the request for quote from and someone from our customer service team will contact you. Please note that if you don't see the sprocket size you need above send us an email or give us a call.


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Chain Size:
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