48 Conveyor Terms and Definitions The following schematics with terms and definitions are included here to help enable Beltservice distributors to better discuss their conveyor belt needs with our salespeople so that the right belt is selected for the application. Angle of Incline Return Idler Snub Idler Drive Pulley Roller Bed Tail Pulley Gravity Takeup Screw Takeup Troughing Idlers Head Pulley Slider Bed Skirtboard Rubber The degree a conveyor is tilted from horizontal. Idlers used to support the belt as it passes underneath the conveyor structure. Idler used to increase the amount of belt in contact with the pulley or to deflect the belt in a different direction. Snubbing a belt near a pulley can in- crease the effective tension at the pulley. Pulley connected to a power source used to drive conveyor. Usually the drive pulley is the head pul- ley, but on some kinds of systems, including many package handling conveyors, the drive pulley is located underneath the conveyor. Free-wheeling rollers on which the carrying side of the belt rides. Pulley at the beginning of the carrying run of the conveyor. The tail pulley is usually free-wheeling. Device used to remove slack and stretch in a conveyor belt. A free weight is suspended from a pulley on the return side of the belt. The takeup is free to lower as needed to remove any slack as the belt is operated. The gravity takeup is usually located as close to the drive pulley as possible. Device utilizing a bolt construction used to length- en the conveyor to remove slack in the conveyor belt. By moving a bolt, the tail pulley is pushed away from the head pulley thus removing slack from the belt. Grouping of idlers on the carrying side of the con- veyor designed to make the conveyor belt curve into a cupped shape, increasing conveyor capacity. Troughing idlers are usually 20º, 35º, or 45º. Pulley at discharge end of belt. The head pulley is usually powered by conveyor drive source. Pulley “pulls” belt along the conveyor. A smooth, flat surface (usually steel or wood) beneath the carrying side of the belt. Skirtboard rubber is primarily used at the loading point to guide product into the center of the belt and to prevent spillage. CONVEYOR TERMS Closely Spaced Idlers at Loading Point Troughing Carrying Idlers (for Troughed Conveyor Belt) Tail Pulley Return Idlers Snub Idlers Vertical Gravity Takeup Head Pulley and Drive Discharge Chute Screw Takeup Direction of Belt Travel Skirtboard Rubber Feed Chute Slider Bed Horizontal Conveyor Incline Conveyor Angle of Incline Roller Bed Troughing Idlers Normally – 20° 35° 45°