Browning DS40H21 Roller Chain Sprocket

The Browning DS40H21 is a double-single strand roller chain sprocket with a split-taper bushing for fast mounting and removal. Engineered for #40 (1/2 in pitch) roller chain, it features 21 teeth and is configured for two single-strand chains—typically one drive chain and one driven chain in roll-case drives or live-roller conveyors. Made from steel, the DS40H21 accepts a Browning split-taper bushing within a finished bore range of 0.3750 to 1.5000 in (bore size H). Its exact dimensions include an outside diameter of 3.6170 in, a pitch diameter of 3.3548 in, and a hub diameter of 2.4940 in, with a two-strand across arrangement and an approximate weight of 2.00 lb. Hardened teeth are included as a standard feature, enhancing wear resistance under typical drive loads. The sprocket is designed to meet ANSI standards for No. 40 chain engagement and works with Browning’s split-taper bushings for reliable, serviceable field installation.