SKF PHS 35-1B21SS sprockets and gears

SKF PHS 35-1B21SS is a reference of sprockets and gears, within Power transmission. Request a quote for PHS 35-1B21SS via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

SKF PHS series sprockets with the SS suffix are stainless steel sprockets for 25 pitch (1/4" x 1/8") roller chains. They are used in transmissions where corrosion or hygiene are critical, such as the food, pharmaceutical or beverage industries. MR Accesorios Industriales sells this line as part of its power transmission offering.

The designation PHS 25-1B9SS is read as follows: PHS identifies the SKF series of sprockets for roller chains; 25 is the chain pitch in eighths of an inch (25/8 = 1/4"), also known as 25 pitch; 1B indicates that it is single strand (a single row of teeth); the following number, 9, is the number of teeth; and SS indicates that the material is stainless steel. Examples in the series, such as PHS 25-1B10SS or PHS 25-1B16SS, show how the number of teeth varies while keeping the same pitch and configuration. This nomenclature allows you to quickly identify the sprocket you need.

These sprockets are used in low- and medium-power chain transmissions where corrosion resistance is a requirement. Industries such as food, where equipment is washed frequently, pharmaceutical, which requires clean environments, or beverage, which works with constant moisture, usually choose stainless steel components. They are also used in packaging machines, conveyors and process equipment in general. In Argentina, MR Accesorios Industriales supplies this line to plants that need reliable and durable spare parts.

To select the right sprocket, take into account the number of teeth: the fewer the teeth, the higher the chain speed and the more wear; the more teeth, the smoother the transmission but the larger the outer diameter. Verify that the pitch matches that of the chain (25 in this case) and that the bore and keyway are compatible with the shaft. Mounting must ensure precise alignment between sprocket and chain to avoid premature wear. Proper lubrication and correct chain tension extend service life. Sealing does not apply to sprockets, but cleanliness of the environment does.

As for equivalences, SKF PHS series sprockets can be interchanged with those of other manufacturers that follow the same pitch and number of teeth standard, provided that the hub and bore dimensions are compatible. Interchangeability between brands depends on respecting the tolerances and the tooth profile. Always consult a specialist before replacing a critical component.

If you already have the part number of your SKF sprocket, such as PHS 25-1B12SS, send it on WhatsApp to MR Accesorios Industriales and we will quote you. We can also advise you if you need help identifying the correct part for your application. MR Accesorios Industriales is your partner for power transmission.