SKF sprocket range nomenclature has a defined prefix of PHS. All sprockets are made to be applied to standardized chains. SKF sprockets conform to conventional basic chain part number format – ISO, BS, or DIN.
The sprocket range designation from SKF has the following is an example to indicate set up.
Sprockets (PHS Product Group)
All SKF sprockets are manufactured according to ISO606 & ASME B29.100 standard. The sprockets are made from steel material C-45 and premium carbon steel no. 20 on hub material if welded. For some special sprockets gray cast iron HT250 or cast iron 250 material is used.
Sprockets 25T and below are hardened as standard (typically 35-40 HRC). This is only valid for sprocket teeths manufactured with steel material C-45. Surface treatment such as black oxide and zinc plating can be offered upon request.
Tolerances are machined according to DIN 8196.
All sprockets are completely deburred and protected with rustproof oil.