Sprocket Catalog

Maximum Bore Diameter: Refers to the maximum bore size diameter a sprocket can be machined to without compromising structural integrity. This term is associated with both “B” and “C” style sprockets. Please refer to Figure 4 for illustration. Length Through Bore: “LTB” Refers to the inside hub diameter and the length to which it was machined. This machined length must be long enough to accommodate the proper size keyway to withstand shear and torque stress induced by the rotating shaft. Please refer to Figure 4 for illustration.

CALIPER DIAMETER

Figure 3 - Measuring sprocket outside diameter

TOOTH (NOMINAL)

Plain Bore: Associated with “A,” “B” and “C” style sprockets where there is no special machining performed to accommodate keyways or set screws, only a hole to accommodate shaft diameter. Please refer to Figure 6 for illustrations of Plain Bore sprockets. Finished Bore: Associated with “B” and “C” style sprockets where the inside diameter of the hub is machined with a standard keyway and two set screws. Finished bore hubs can also be machined to specific requirements depending on the needs of the application. Please refer to Figure 5 for an illustration. Sprocket Hub Style: U.S. Tsubaki manufacturers various sprocket hub styles to meet the application requirements of our customers. Please refer to Figure 6 for the various stock style hub configurations offered by U.S. Tsubaki.

LTB

STYLES TYPEB

STYLEE TYPEB

Figure 4 - Maximum bore diameter and thru bore

Figure 5 - Finished bore sprocket

TOOTH (NOMINAL)

Y LTB

LTB

TOOTH (NOMINAL)

LTB

TOOTH (NOMINAL)

X STYLEE TYPEC

STYLEE TYPEB X

STYLES TYPEB X

TYPEA

STYLES TYPEB LTB

STYLEE TYPEB LTB

LTB STYLEE TYPEB

LTB STYLED TYPEC

LTB STYLES TYPEB

Figure 6 - Stock sprocket hub styles

TOOTH (NOMINAL)

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