And slack and tight side tensions not only depend on load and pretension, but on belt elasticity and structure stiffness as well.Ī constant slack side tensioner is a better way to control belt tension in power-transmission drives and in some conveyors. However, reaction forces vary under load. Overall belt length remains constant during operation regardless of loading conditions, provided belt sag and some other minor influences are neglected. This is possible because, after initial tensioning and straightening, belts tend not to elongate or creep. In most cases, timing belts perform best when the magnitude of slackside tension is about 10 to 30% that of the effective tension.Īlthough generally not recommended, belt drives can work without an adjustment mechanism. Pretension prevents belt slack-side sagging and ensures proper tooth meshing. Where 1 = belt wrap angle around the driver pulley.īelt pretension (initial tension), T i, is the tension set by an adjustable idler pulley. In powertransmission drives, forces on both shafts are equal in magnitude: Where d 1 = pitch diameter of the driver pulley, P 2 = power required at the driven pulley, 1 and 2 = angular speeds of the driver and driven pulleys of pitch diameters d 1 and d 2, respectively, and = efficiency (typically about 0.94 to 0.96).Ī force equilibrium at the driver or driven pulley relates tight and slack-side tensions and the shaft reaction forces F s1 or F s2. The driving torque, M 1, is related to the driven torque (load), M 2, by: The effective tension or working force generated at the driver pulley overcomes the driven pulley's resistance to motion. Where T 1 and T 2 = tight and slackside tensions. This effective tension, T e, is the force transmitted from the driver pulley to the belt and to the driven pulley or load: They may also convey a load placed on the belt surface.Ī drive under load develops a difference in belt tension between the entering (tight) and leaving (slack) sides of the driver pulley. Timing-belt drives transmit torque and motion from a driving to a driven pulley or force to a linear actuator. Our friendly and helpful staff can answer any questions you may have.A urethane timing belt moves samples into position in this CAD simulation of an automated blood sampling machine. If your vehicle is approaching the 100,000km mark or it’s been a while since the cambelt/timing belt was checked – bring it in for the team at Cambelt Replacement Services to inspect. This allows your car to not just run smoothly, but to run altogether! Your Cambelt is the connection point between the crankshaft and camshaft, maintaining a constant, timed motion when the engine is on. If your timing belt is too loose, it can fall off and it if it is too tight will add pressure, which can cause the belt to break. The belt has teeth on the interior that will fit into slot on your vehicle to hold the belt in place. You should read your owner’s manual to learn the estimated time for replacing your timing belt – typically it is recommended that you have the cambelt replaced at 100,000kms, or ever five years whichever comes round first.Ĭambelts or timing belts are manufactured using nylon and butyl which are the same materials used in the manufacturing of your tyres. As with most parts of your car, you will need to have your mechanic check the cambelt from time to time for wear and tear. If you are wondering what the difference is between a cambelt and a timing belt, the team at Cambelt Replacement Services are here to help!Įssentially Cambelts and timing belts are the same thing, so there is no difference! They come in different sizes and shapes according to the vehicle they were made for and the design that was needed to suit your car.Ī cambelt or timing belt is normally found at the end of the engine against the radiator or on the interior of the inner wing. What’s the difference between a cambelt and a timing belt?
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