192-8M-50 manufactured by Challenge can be used with a 3525 bush, Part numbers are identified by a 2 or 3 digit number (e.g.192) which representsthe number of teeth, a number and a letter (e.g. 8M) which is the pulleys pitch and a 2 or 3 digit number (e.g. 50mm) the width of the appropriate corresponding timing belt, for example 192-8M-50. |