This product has prepared holes only.
There are no shaft holes, so please make a hole of any size within a range of the maximum shaft hole diameter.
Note that drilling, key-way milling, etc. is not supported.
In order to avoid interference with a chain, the slot is established in the hub perimeter.
Number of Gears
Outside Diameter (Do)(phi mm)
Number of Rows
Maximum Shaft Hole Diameter d (mm)
Prepared Hole Diameter d (mm)
Hub diameter D H(mm)
Carbon-steel material for machine structures It begins to delete and is specification.