SKF PHS 12B-3B21 sprockets and gears

SKF PHS 12B-3B21 is a reference of sprockets and gears, within Power transmission. Request a quote for PHS 12B-3B21 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

SKF PHS series sprockets are precision toothed wheels for chain transmission. They are mounted on shafts and transmit rotary motion through a roller chain. They are used in machine tools, packaging equipment, conveyors and transmission systems in general. Their design allows smooth meshing and long service life when selected and mounted correctly.

The designation PHS 05B-1B10 is read as follows: PHS identifies the SKF sprocket line; the pitch code (for example, 05B) indicates the chain pitch according to ISO 606; 1 indicates single strand; B the hub type (B = hub with keyway); and 10 the number of teeth. The series examples cover different pitches and numbers of teeth. This nomenclature allows you to quickly identify the pitch, configuration and number of teeth of the sprocket you need.

These sprockets are used in low and medium power chain transmissions. They are common in the food industry, bottling plants, packaging lines, textile machines, printing equipment and chain conveyors. They are also found in the agricultural sector, in seeders and harvesters, and in metalworking shops for door drives and linear motion systems. In Argentina, they are used in production plants that require precise synchronization and low maintenance.

To select the correct sprocket, take into account the chain pitch (according to the code), the number of teeth needed for the transmission ratio, and the shaft diameter where it is mounted. Check that the keyway matches that of the shaft and that the hub is wide enough for the load. During installation, align the sprockets and the chain to avoid premature wear; angular or parallel misalignment accelerates chain stretching. Lubricate with suitable oil or grease according to speed and load, and periodically check chain tension.

SKF PHS series sprockets are interchangeable with other manufacturers that follow ISO 606 for the corresponding pitch. When replacing, verify that the number of teeth, pitch diameter and hub type match the original. Interchangeability between brands is possible when these variables are respected, but it is always advisable to consult a specialist.

If you already know the code of your SKF PHS sprocket, send it via WhatsApp to MR Accesorios Industriales and we will send you the quote. We can also advise you if you need help identifying the part or choosing the right number of teeth for your application. MR Accesorios Industriales sells SKF, and offers technical support so your transmission works without problems.