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Pilot bore roller chain sprockets are designed with a basic pilot hole, which is ideal for machining to your required shaft sizes plus keyway or grub screws if needed. These type of pilot bore sprockets are ideal for unusual shaft diameters, or tapered shafts, or shafts with steps or non standard keyways. (If you have a standard shaft size, or do not have the machining facility needed to modify the pilot bore sprockets, why not try our taperlock sprockets for a fast & easy solution.)
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