Description of the ANSI sprocket

In this article, you will learn about ANSI sprockets.

ANSI

North American and some Asian sprocket manufacturers have adopted ANSI code B 29.1, which edicts design, dimensions, and interchangeability within a chain drive.

ANSI Sprockets typically do not last as long as their European counterparts due to smaller tooth pitches but have a clear mathematical theme and simple design. ANSI covers eight different strand types of sprockets: single-strand, double-strand, triple-strand, and multiple-strand (4, 5, 6, 8, 10).

ANSI sprockets are notably characterized by ‘type’, which indicates the sprocket’s hub style. Hub styles offer unique mounting shaft mounting configurations, which are further covered under mounting options. There are four styles.

Style A – a flat sprocket with no hub

Style B – a sprocket with a hub on one side

Style C – a sprocket with hubs on both sides

Style D – a sprocket with a bolted hub attached to a plate

Sprockets that comply with ANSI standards also have priority numbers, with each sprocket having a number related to tooth pitch and backlash diameter.

The ANSI sprocket number may have letter and number suffixes, which will indicate the number of chain strands and any additional properties of the sprocket.

Common suffix abbreviations include DC for dual capacity, V for hardened pins, H for heat-treated plates, NP for nickel plated, HP for hollow pins, SB for side bend, NM for non-metallic, BR for brass, CD for cadmium plated, Zi for zinc plated, and CH for chrome plated.