Black Ace Dual Pitch Roller Chain Sprockets are produced with the highest integrity. You will recognize value, 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 using one side) found in applications where clearance width is narrow. More economical than C Type.
C Type (hub upon both sides) found in applications where B Type isn’t wide enough to withstand torques made by drive.
Split Style Building – Once you use a Split Sprocket, you might never want to use a setscrew mount style again. Removal or set up is a breeze. Can be used in practically all applications. An additional benefit to Black Ace’s split sprockets is certainly that the shaft/keyway protection is much tighter when compared to a typical setscrew mount.
Hardening Obtainable – Flame hardening of sprockets can be available as a choice.