Black Ace Double Pitch Roller Chain Sprockets are manufactured with the best integrity. You will understand worth, as these sprockets are flame-cut and machined with the highest precision available on the market.
ANSI Standard Torch Profiles
A – B – C Hub Types
A Type (no hub) typically used in weld-on applications.
B Type (hub using one side) found in applications where clearance width is narrow. Less expensive than C Type.
C Type (hub upon both sides) found in applications where B 
Type isn’t wide enough to withstand torques produced by drive.
Split Style Construction – Once you use a Split Sprocket, you may never want to employ a setscrew mount design again. Removal or set up is a breeze. Can be used in virtually all applications. An sprockets additional benefit to Black Ace’s split sprockets is that the shaft/keyway security is much tighter than a typical setscrew mount.
Hardening Available – Flame hardening of sprockets is certainly available as an option.