standard connecting links are used when roller chains are operated under normal conditions. for severe applications, press fit connecting links are suggested.
STANDART PULLEYS These pulleys have equally spared grooves machined into the outside diameter, to give correct meshing with the bell teeth. The pulley grooves are of a special design to give this correct meshing of the belt teeth with minimal friction. all pulleys manufactured have correct minimum meshing tolerancer built in. The pitch diameter is always larger than the outside diameter. The pulleys are normally stocked in a wide range of various diameter (no. of teeth) and standart widths.
Keyways are British Standard Metric B S 4235. Part 1: 1972 DIN 6885 and conform to ISO recomendations with the exception of those marked, which are shallower. Where a key is to be used it should be parallel and side fitting, with top clearance. Depth of keyway is measured at the CENTRE