Black Ace Dual Pitch Roller Chain Sprockets are produced with the highest integrity. You will realize worth, as these sprockets are flame-cut and machined with the highest precision in the marketplace.
ANSI Standard Torch Profiles
A - B - C Hub Types
A SORT (no hub) typically used 
in weld-on applications.
B Type (hub on one side) found in applications where clearance width is narrow. More economical than C Type.
C Type (hub on both sides) used in applications where B Type is not wide enough to withstand torques produced by drive.
Split Style Construction - Once you use a Split Sprocket, you might never want to employ a setscrew mount style again. Removal or set up is a breeze. May be used in virtually all applications. Another advantage to Black Ace’s split sprockets can be that the shaft/keyway protection is much tighter than a typical setscrew mount.
Hardening Available - Flame hardening of sprockets is available as a choice.