Page 592 - 2017 Racecar Engineering Circle Track Parts and Accessories Catalog

PROFESSIONAL SERIES SPORTSMAN SERIES
QUICK CHANGE GEARS QUICK CHANGE GEARS
Gears are aircraft grade steel A quality gear priced for the sportsman
for max i mum strength. Each racer! Sportsman Series, unlightened
gear has a shaved finish 10-spline gears are CNC crown hobbed
to minimize back lash and from 8620 material, then heat treated and REM
run out, and is broached finished prior to shipment.
for 10-spline shaft. A 4.11 Ring and Pinion 4.86 Ring and Pinion
5-step heat treat ing pro- (9-37 Teeth) No. (7-34 Teeth)
cess yields max i mum gear Gear Set No. Low High Of Teeth Low High
life for high stress ap pli ca tions. SCS101 4.11 4.11 28/28 4.86 4.86
Gears have a black oxide finish, and lightened SCS102 3.96 4.26 27/28 4.68 5.04
faces to reduce rotating weight without sacrificing SCS105 3.94 4.28 24/25 4.66 5.07
strength. SCS1015 3.90 4.33 19/20 4.61 5.12
4.11 Ring and Pinion 4.86 Ring and Pinion SCS1015K 3.85 4.38 15/16 4.56 5.18
(9-37 Teeth) No. (7-34 Teeth)
Gear Set No. Low High Of Teeth Low High SCS1026 3.83 4.41 27/29 4.52 5.24
SCS01 4.11 4.11 21/21 4.86 4.86 SCS106 3.78 4.46 23/25 4.47 5.28
SCS02 3.96 4.26 27/28 4.68 5.04 SCS1025 3.74 4.52 20/22 4.42 5.35
SCS05 3.94 4.28 24/25 4.66 5.07 SCS1012 3.68 4.58 26/29 4.36 5.42
SCS15 3.90 4.33 19/20 4.61 5.12 SCS107 3.63 4.64 23/26 4.30 5.49
SCS15K 3.85 4.38 15/16 4.56 5.18 SCS107K 3.58 4.69 21/24 4.23 5.54
SCS26 3.83 4.41 27/29 4.52 5.22 SCS1017 3.55 4.76 19/22 4.19 5.63
SCS06 3.78 4.46 23/25 4.47 5.28 SCS108K 3.49 4.83 17/20 4.13 5.71
SCS25 3.74 4.52 20/22 4.42 5.35 SCS108 3.48 4.85 22/26 4.11 5.75
SCS12 3.68 4.58 26/29 4.36 5.42 SCS1019 3.45 4.89 21/25 4.08 5.78
SCS07 3.63 4.64 23/26 4.30 5.49
SCS07K 3.58 4.69 21/24 4.23 5.54 SCS109K 3.42 4.93 25/30 4.05 5.83
SCS17 3.55 4.76 19/22 4.19 5.63 SCS109 3.39 4.97 19/23 4.01 5.88
SCS08K 3.49 4.83 17/20 4.13 5.71 SCS1011 3.35 5.04 22/27 3.96 5.97
SCS08 3.48 4.85 22/26 4.11 5.75 SCS103 3.31 5.10 25/31 3.92 6.03
SCS19 3.45 4.89 21/25 4.08 5.78 SCS1013 3.29 5.14 20/25 3.89 6.08
SCS09K 3.42 4.93 25/30 4.05 5.83 SCS1018 3.25 5.19 19/24 3.85 6.13
SCS09 3.39 4.97 19/23 4.01 5.88 SCS104K 3.21 5.26 18/23 3.80 6.21
SCS11 3.35 5.04 22/27 3.96 5.97 SCS104 3.18 5.31 24/31 3.76 6.28
SCS03 3.31 5.10 25/31 3.92 6.03 SCS1020 3.16 5.34 20/26 3.74 6.32
SCS13 3.29 5.14 20/25 3.89 6.08 SCS1022 3.12 5.41 19/25 3.69 6.39
SCS18 3.25 5.19 19/24 3.85 6.13 SCS1016 3.08 5.48 24/32 3.65 6.48
SCS04K 3.21 5.26 18/23 3.80 6.21 SCS1010 3.04 5.55 20/27 3.60 6.56
SCS04 3.18 5.31 24/31 3.76 6.28 SCS1034 3.00 5.63 19/26 3.55 6.65
SCS20 3.16 5.34 20/26 3.74 6.32 SCS1014 2.95 5.72 23/32 3.50 6.76
SCS22 3.12 5.41 19/25 3.69 6.39
SCS16 3.08 5.48 24/32 3.65 6.48 SCS1014K 2.93 5.76 20/28 3.47 6.81
SCS10 3.04 5.55 20/27 3.60 6.56 SCS1035 2.91 5.80 17/24 3.44 6.86
SCS34 3.00 5.63 19/26 3.55 6.65 SCS1032K 2.87 5.89 23/33 3.39 6.97
SCS14 2.95 5.72 23/32 3.50 6.76 SCS1024 2.83 5.96 20/29 3.35 7.04
SCS14K 2.93 5.76 20/28 3.47 6.81 SCS1036 2.80 6.04 17/25 3.30 7.15
SCS35 2.91 5.80 17/24 3.44 6.86 SCS1037 2.78 6.07 23/34 3.29 7.18
SCS32K 2.87 5.89 23/33 3.39 6.97 SCS1023 2.74 6.16 18/27 3.24 7.29
SCS24 2.83 5.96 20/29 3.35 7.04 SCS1021 2.69 6.28 17/26 3.18 7.43
SCS36 2.80 6.04 17/25 3.30 7.15 SCS1027 2.66 6.35 22/34 3.15 7.51
SCS37 2.78 6.07 23/34 3.29 7.18 SCS1043 2.63 6.42 16/25 3.11 7.59
SCS23 2.74 6.16 18/27 3.24 7.29 SCS1028 2.60 6.49 19/30 3.08 7.67
SCS21 2.69 6.28 17/26 3.18 7.43 SCS1029 2.57 6.58 15/24 3.04 7.77
SCS27 2.66 6.35 22/34 3.15 7.51 SCS1030 2.53 6.67 16/26 2.99 7.89
SCS43 2.63 6.42 16/25 3.11 7.59 SCS1041 2.49 6.77 17/28 2.95 8.00
SCS28 2.60 6.49 19/30 3.08 7.67 SCS1031 2.46 6.85 21/35 2.91 8.10
SCS29 2.57 6.58 15/24 3.04 7.77
SCS30 2.53 6.67 16/26 2.99 7.89 SCS1033K 2.43 6.94 16/27 2.88 8.20
SCS41 2.49 6.77 17/28 2.95 8.00 NOTE: On short tracks such as 1/4, 3/8, and 1/2 mile, the larger gear is
most com mon ly used on top. Example: If you have a 4:11 ring and pinion
SCS31 2.46 6.85 21/35 2.91 8.10 and you install a #4 gear set with the big gear on top you will have a 5:31
SCS33K 2.43 6.94 16/27 2.88 8.20 ratio.
SCS33 2.41 7.00 17/29 2.85 8.28 • High designation on chart means higher numerical number, but lower
SCS31K 2.39 7.05 14/24 2.83 8.33 gear ratio.
SCS30K 2.37 7.12 15/26 2.80 8.42 • Low designation on chart means lower numerical number, but higher
gear ratio.

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