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 |
|
|
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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