998 series engineer class sprocket is used for a wide verity of chain sizes. These sizes include 998, S998 and SS5998 size chains. These sprockets are typically supplied as cast material but we can also supply them as steel for longer operation. The below chart shows the standard tooth counts as well as dimensions for each size.

Cast 998-Series Sprockets








Tooth Face at Pitch Line: 1.375″ – Roller Diameter: 2.690″

Sprocket Size Tooth Count Pitch Diameter Style Hub Diameter Length Thru Bore Maximum Bore Weight (LBS)
998C4 4 23.53″ C 9.00″ 6.00″ 6.44″ 195.0 LBS
998C5 5 29.14″ C 9.00″ 6.00″ 6.44″ 258.0 LBS
998C6 6 34.81″ C 9.00″ 6.00″ 6.44″ 325.0 LBS


We aslo offer a full range of both precision roller chain and engineered.

Applications are varied and range from conveyor, elevator transfer to broad general industrial power transmission specialty applications with attachments and/or special materials are also available.