Glossary of technical terms
|Wearing away by rubbing, scraping.
|The bonding strength between two materials.
|The exposure to an environment for a period of time.
|Arc of contact
|The circumferential portion of a pulley which is engaged by a belt.
|Beams or metal plates secured transversely on both sides of belt end(s) to hold ends in a desired position.
|Belt cleaning device
|A scraper or rotating or washing device pressed against the belt surface to remove material stuck to the belt.
|A device for holding two ends of a conveyor belt together.
|The force per unit width of belt required to produce a stated percentage of elongation.
|The amount of vertical deflection of a conveyor belt from a straight line between idlers, usually expressed as a percentage of the center to center spacing of the idlers.
|The speed differential between the belt and the pulley surface.
|Belt training idler
|An idler having a belt-actuated swivel mechanism to automatically control side drifting of a conveyor belt.
A system of idlers to turn a belt over.
|The force required to induce bending around a specified radius and, hence, a measure of stiffness.
|A pulley used to change the direction of a belt.
|A cut of a textile material or belt ends made diagonally at an angle less than 90 degrees - usually 30° - to the longitudinal axis.
|Binder warp yarn
|One of the warp systems in a straight warp fabric interlaced with the filling yarn to provide the strength to hold mechanical fasteners.
|Migration to the surface of plasticizer, waxes or similar materials to form a film or beads. See also Bloom.
|A raised spot on the surface or a separation between layers usually forming a void or air-filled space in the vulcanized conveyor belt.
|Used in some long conveyors to reduce the power/tension at the drive pulley.
|The non-carrying belt side towards the pulleys.
|An extra ply for shock absorption to minimize gouging.
|Bucket elevator belt
|A transversely rigid belt with buckets attached, for vertical conveying.
|A machine equipped with three or more heavy drums revolving in opposite directions.
|The material load on the belt, given in tons per hour (t/h).
|The fabric, cord and/or metal reinforcing section of a belt, as distinguished from the rubber cover.
|A type of flexible belt-carrying idler with ends supported in pivoted stands. The tube or rollers sag under the weight of the load to form trough.
|The distance between the center of two pulleys or idlers. Sometimes also called centers or center distance or conveyor length.
|A device for removing adherent material from the belt
|Transverse raised sections on a conveyor belt to stabilize material carried up an incline.
|The fabric elongation is adjusted by means of the weft yarn twist.
|The deformation in a material remaining after it has been subjected to and released from a compressive force.
|The weight applied to the take-up assembly to maintain proper belt tension.
|The outer rubber (or PVC) components of a belt.
|A sharp break or fissure in the surface. See also "Wrinkle".
|The action of a belt alternately losing speed on the driving pulley and gaining speed on the driven pulley.
|The waviness of the yarn in a woven fabric or the difference in distance between two points on a yarn as it lies in a fabric and the same two points when the yarn has been removed and straightened. Expressed as a percentage of the distance between the two points as the yarn lies in the fabric.
|A pulley with a greater diameter at the center, or other points, than at the edges.
|The uncovered edge of a belt, created by cutting after vulcanization.
|A deleterious change in the chemical structure of a material.
|The separation of layers of material.
|A yarn sizing system for continuous filament synthetic fibers on the basis of the weight in grams of 9000 meters of the yarn.
|The ratio of the mass of a body to its volume or the mass per unit volume of the substance. For ordinary practical purposes, density and specific gravity may be regarded as equivalent.
|Coated with rubber compound by passing through a rubber solution and drying.
|A short section of belting mechanically spliced into a length of belting and removed when the take-up allowance is exceeded.
|An apparatus capable of inducing various loads for evaluation of dynamic belting properties.
|A measure of how well a material accommodates the transport of electric charge, measured in Ohm (Ω).
|The length of a closed belt (without splice allowances).
|Energy optimized belt
|A process whereby rubber is forced through a shaping orifice.
|Determines the optimum difference between the forces F1 and F2 without belt slip.
|The weakening of a material occurring when repeated application of stress causes permanent strain.
|A belt that discharges material onto another conveyor belt.
|A continuous fiber of very high length.
|Retards the burning action of fire or flame. Achieved by adding fire retardents to the compound.
|The resistance to motion due to the contact of surfaces
|The thickness of a belt or its individual elements.
|The effect of sharp heavy material falling onto a conveyor belt cover to loosen or tear out pieces of the cover.
|A mechanical system that adjusts for the stretch or shrinking of a conveyor belt automatically by a weighted pulley in the system.
|Degree of resistance to indentation
|The pulley at the discharge end of the conveyor
|Hooke's law of elasticity states that if a force (F) is applied to an elastic spring, its extension is linearly proportional to its tensile stress σ and modulus of elasticity (E): ΔL = 1/E × F × L/A = 1/E × L × σ
|A loss of mechanical energy due to successive deformation and relaxation, measured by the area between the deformation and relaxation stress-strain curves.
|A nonpowered roller supporting the belt
|A stroke of a body dropping on the belt
|A belt idler having a resilient roll covering, resilient molded elastomer rings, springs or other means of absorbing impact energy at the place where material falls onto the belt.
|The relative ability of a conveyor belt assembly to absorb impact loading without damage to the belt. See also "transverse reinforcement".
|The connection of two belt ends
|A trademark for aramid
|A smooth or embossed covering on a pulley to increase friction between belt and pulley.
|Low rolling resistance
|The highest tension occurring in any portion of the belt under operating conditions
|Any mechanical device used to join the ends of belting.
|Modulus of elasticity
|The force divided by the percent elongation to cause the elongation.
|A solid rubber belt edge formed in a mold.
|A trademark for polyamide.
|Cracks caused by exposure to an atmosphere containing ozone.
|A discharge over the head of the conveyor
|Is observed under cyclic loading conditions with small strain amplitudes, and is manifest as a dependence of the viscoelastic storage modulus on the amplitude of the applied strain.
|Elongation permanently removed from belting when it is first used
|Usually the quality or condition of allowing passage of air through a steel cord to identify the degree of rubberization.
|A suspension of a finely divided polymer (PVC) in a plasticizer.
|A layer of fabric in a belt.
|The minimum belt breaking strength (DIN) of a belt in Newtons per millimeter of belt width.
In the USA sometimes used as a term for the working tension.
|A conveyor for which the head is at a substantially lower altitude than the tail (downhill conveying), generating power.
|Part of a conveyor's return run.
|A multiplier applied to the calculated maximum force to which a conveyor belt splice (as the weakest link in a conveyor belt) will be subjected. A factor of safety accounts for imperfections in materials, flaws in assembly, material degradation, and uncertainty in load estimates.
Note: In the USA usually the safety factor is related to the belt but not to the splice.
|A take-up for a conveyor system in which movement of a pulley-bearing block is accomplished by means of a screw.
|If set under fire the belt will generate gases that extinguish the fire.
|Shelf storage life
|The period of time prior to use during which a product retains its intended performance capability. Important for (uncured) splicing material.
|A belt conveyor having overend discharge, the whole being mounted on a travelling carriage capable of being shuttled backwards and forwards.
|A layer of rubber material laid on a fabric but not forced into the weave. Normally laid on a frictioned fabric.
|In a conveyor system, the vertical or inclined plates located longitudinally and closely above the belt to confine the conveyed material.
|Grinding equipment to bevel belt ends for an overlap splice. There are sanding belt, drum and disk skivers in use.
|Belting made in wide widths and long lengths for later slitting into narrower widths and cutting into shorter lengths.
|A conveyor belt used to carry material along an inclined flight.
|A non-driven pulley located close to the drive pulley to provide a greater arc of contact around the drive pulley.
|A single ply ("monoply") interwoven fabric.
|Additional length required to make a splice.
|A field splicing engineer.
|Made of high tenacy polyester fibres for the warp and weft polyamide yarns, both held together by a polyamide composite yarn.
|The pulley near the loading end of the conveyor system
|A pulley which can move in space in order to maintain relatively constant tension.
|The fabric, cord and/or metal reinforcing section of a belt, as distinguished from the rubber cover.
|Stress on the belt tending to cause extension.
|A thin sheet of unvulcanized rubber inserted between plies in vulcanized repairs of splices.
|An idler mounted on a mechanical device, actuated by the belt moving against it to make the belt run straight.
|The distance between the last fully troughed idler and the flat driving or discharge pulley.
|An additional layer of single polyamide cords in custom-made pitch and diameter for increased rip and impact resistance.
|A device for discharging material from a belt.
|The property of a belt that permits it to conform to the contour of troughing idlers.
|The property of materials that exhibit both viscous and elastic characteristics when being deformed. Viscoelasticity is the result of the diffusion of atoms or molecules inside of an amorphous material.
|The resistance of a material to flow under stress.
|An irreversible process during which a rubber compound, through a change in its chemical structure, becomes elastic. See more.
|A mobile curing machine for field splicing (also called press).
|The lengthwise yarns in a woven fabric.
|The crosswise yarns in a woven fabric.
|An appearance usually resulting from curing with separation paper or cloth.
|The stress per unit strain for elastic materials.