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Pre-bored timing belt pulleys
Pre-bored timing belt or toothed belt pulleys require additional machining by the user, within the limits indicated for each item in the list. These pulleys are either supplied with a basic pilot bore or with a centre punch mark indicating where the bore can be made. After the bore has been machined to the required size, the pulleys can also be used as an internal tensioner for poly V-belts when combined with a suitable bearing.