A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Axle A shaft either rotating or non-rotating on which are mounted wheels or rollers. Back to top Bearings A machine part in or on which are mounted wheels or rollers. Bed Roller The roller which supports the load conveying belt. Between Frames The dimension inside to inside of the conveyor frame rails. Back to top Carrying Rollers The rollers which support the load (load-carrying rollers). Conveyor Bed Carrying rollers which support the load while it is being conveyed. Conveyor Frame The longitudinal structural member for supporting the load-carrying rollers. Couplings Members used to join conveyor sections to make an integral conveyor. Cross Ties Structural members which maintain frame rail spacing. Curve, Differential A curved section of roller conveyor having a conveying surface of two or more concentric rows of rollers. Curve, Horizontal A curved roller conveyor section used to change the direction of travel in the horizontal plane. Back to top Drive An assembly of structural, mechanical and electrical parts which provides the motive power for a conveyor. Drive, Intermediate A drive which transmits motion to a conveyor at a point other than the terminals. Drive Pulley A cylindrical member, normally lagged, with or without a crowned face, used for driving the conveyor belt. May be mounted on a revolving shaft or internally powered with built-in motor and gear reducer. Back to top Frame Rails Members which support the rollers in powered and non-powered roller conveyors. Back to top Grade The rate of incline or decline in terms of degrees from the horizontal, percent of rise to the horizontal distance, or inches of vertical rise per foot of horizontal projection. Guard A covering or barricade for safety purposes such as gear, chain, or nip guards. Back to top Lagging A pulley surface treatment to provide greater driving traction for drive pulley. Live Roller Conveyor A series of rollers over which objects are moved by the application of power to all or some of the rollers. Back to top Metering Conveyor A short powered conveyor whose speed and motion are controlled to release unit loads at a predetermined rate. Pressure Roller The roller used for holding the driving belt in contact with the carrying rollers. Pop-Out Roller A carrying roller mounted in such a manner as to pop out when foreign objects are introduced between the belt and the roller. Powered Feeder Short power conveyor generally used for in-line transfer of unit loads from level to incline or from decline to level. Back to top Rated Life of Bearings Manufacturers ratings based on load speed factors. Return Roller or Idler The roller which supports the return run of the belt. Roller A round part free to revolve its outer surface. The face may be straight or tapered, crowned, concave or flanged, corrugated, ribbed or fluted. A cylindrical member with internal bearings mounted on a non-rotating shaft. Roller with live shafts and outboard bearings. In a chain driven live roller conveyor, rollers are powered via sprockets attached to either or both ends of the roller or live shaft. Carrying: The conveyor roller upon which the object being transported is supported. Driven: Any carrying roller driven by chain or other propelling medium. Idler: Any carrying roller of a live roller conveyor which is not driven. Tapered: A conical conveyor roller for use in a curve with end and intermediate diameters proportional to their distance from the center- point of the arc. Roller Bed The conveying belt is supported by a series of rollers. Roller Centers Distance between center lines of adjacent rollers. For curves, roller centers are measured at the inside radius. Roller Conveyors A series of rollers supported in a frame over which unit loads are advanced manually, by gravity, or by power. Roller Conveyor Curve An arcuate or circular section of roller conveyor. The curve radius is measured to the inside face of the inside frame rail. The hand of a curve is determined when facing in the direction of travel. Curves may have either: A) Straight face rollers; B) Differential Rollers; or C) Tapered rollers. Back to top Slider Bed The conveying belt is supported by a stationary surface. Sprocket A wheel with suitably shaped and spaced cogs or teeth to engage with the links of a chain. Driven: A sprocket propelled by the chain. Return Idler: A sprocket supporting the return run of the chain. Straight Section An assembly of frame rails, cross-tie members and rollers. Rollers may be set high or low in frame rails. Supports Arrangement of members used to maintain the elevation or alignment of the conveyor. Supports can take the form of hangers, floor supports, or brackets and can be either stationary or portable. Back to top Take-Up The assembly of structural and mechanical parts which provides means to compensate for stretch, or wear, and to maintain proper chain tension. Adjustment is usually manual and is employed on continuous chain driven live roller construction only. Back to top Vertical Bend Nose-Over Curved or segmented frame sections having rollers properly spaced to provide a transition from incline to level or from level to decline. Width, Effective Conveyor The clear dimension across the conveyor bed and parallel to the carrying rollers where the unit load may be conveyed; on chain driven live roller conveyor, the dimension between side rail and chain cover plate.