SPROCKET HUB MOUNTING HOLES
U.S. Tsubaki stock sprockets do not come with bolt mounting holes with the exception of Taper-Lock and QD hubs. In select instances, bolt mounting holes may be required in order to facilitate attachment of custom hubs, or accessory pieces that may be required to fulfill the needs of the application at hand. Sprocket bolt mounting holes typically apply to “A” plate sprocket types, where the holes required are located around the circumference of the plate bore. However, select “B” style sprockets may also require mounting holes. Please reference Figure 3 for a depiction of an “A” plate sprocket with mounting holes installed.
Figure 3 “A” plate sprocket with mounting holes
SPROCKET LIGHTENING HOLES
There may be instances where reducing the weight of a given sprocket would be advantageous for the application. This is more common for applications that utilize large pitch sprockets. U.S. Tsubaki offers the option to incorporate lightening holes into sprockets at an additional charge. Please reference Figure 4 for a depiction of an “A” plate sprocket with lightening holes.
Figure 4 “A” plate sprocket with lightening holes
SPROCKET HUB OUTSIDE DIAMETER
Select applications may call for the sprocket hub diameter to be reduced in size or increased for various reasons. U.S. Tsubaki offers the option to reduce the outside diameter of a given hub by removing material. Please reference Figure 5 for a depiction of a “B” style sprocket with a smaller hub diameter versus standard. Larger diameter hubs may be more difficult to accommodate but please contact U.S. Tsubaki if needed.
TAPERED HUB BORE/TAPERED KEYWAY
U.S. Tsubaki offers the option to taper the inside bore diameter or keyway for all “B” style stock sprockets. Please reference Figure 6 for a depiction of a tapered bore “B” style sprocket.
Figure 5 Reduced hub diameter
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