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How to Order Code: The following decodes the model number for a given U.S. Tsubaki Stock Sprocket product. The following example should be used to decipher the characteristics and features associated with a given sprocket. A 35 B TL 18
Altered !!
Chain Pitch in Inches
Hub Type
TAPER-LOCK
Number of Teeth
18 19 20 21
22 23 24 25
26 28 30 32
A: Alteration Required
B: Hub Extension One Side
35: 3/8" Pitch
TAPER-LOCK hub
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Altered: The term “Altered” applies to a sprocket that requires a minor modification to the standard configuration to fulfill the requirements of the application at hand. Some examples of common alterations include: rebore to a different size than standard, different set screw location than standard, drilling of holes into sprocket plate for accessory mounting, non-standard keyway size, etc. A complete list of common alterations is available in the engineering section of this catalog. It should be noted that adding the prefix "A" is used only when an alteration is required. It is not necessary for standard products and only applies when a non-standard feature is required.
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Fraction Legend for Hub Bore Size: The following table should be used to define the hub bore size associated with “Finished Bore” stock sprocket product. Note that a letter designator is used to represent a fractional dimension. For example: a 1B hub bore equates to a sprocket bore of 1.125" inside diameter.
Letter Designator
Fractional Size
Decimal Size
A B C D E F G H
1/16"
0.0625" 0.1250" 0.1875" 0.2500" 0.3125" 0.3750" 0.4375" 0.5000" 0.5625" 0.6250" 0.6875" 0.7500" 0.8125" 0.8750" 0.9375"
1/8"
3/16"
1/4"
5/16"
3/8"
7/16"
1/2"
I
9/16"
J K L P R M
5/8"
11/16"
3/4"
13/16"
7/8"
15/16"
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