Types of belts and pulleys pdf

Returntail pulley a conveyor pulley used for the purpose of redirecting a conveyor belt back to the drive pulley. Spz spc identifying a vee belt to identify a vee belt the following information must be known. The v belts are basically classified into five types or sections i. V belt pulleys are solely used for transmitting power between two parallel axels. Designers are no longer confined to the use of one type of drive system. In a two pulley system, the belt can either drive the pulleys normally in one direction, or the belt. To get a satisfactory drive, therefore, with this type of belt large pulleys with a slow moving belt are needed. These components close any potential safety gaps in the manufacturing. The combination pulleys belt is quickly installed or removed for all catalog listed shaft centers. Types of systems there are three basic pulley configurations. The center distance designer shows all available pulleys and belts that fit within your criteria.

We offer a wide variety of belts, and all of them covered by our guarantee powerwedge 1 higher hp and longer life for maximum saving cog belt 2 up to 412% more efficient than ordinary belts veeband 3 v belt in banded design. Eliminates belt whip an turnover on conventional drives. Occasionally flat belt pulleys are suitable when the backside of the v belt is used to rotate the pulley in the opposite direction of the driven pulley, as commonly employed with ribbed v belts. The accessory drive transmits the power of the engine to the alternator, fan, water pump, airconditioning compressor and power steering. The article describes on the constructional aspects of v belts, the types of v belts and their advantages and disadvantages. These types of belt materials are made up of plastic sheets and rubber layers. Belts may be used as a source of motion, to transmit power efficiently or to track relative movement. V belts, flat belts, wedge belts, synchronous belts and others all have their specific design and application criteria, and within each design section.

It should be replaced with a new belt after running for between 40,000 and 240,000 km. Many of the product specifications included in this article are published. This means that it will often be necessary to repeat the calculations with a different type of belt than the one first selected. But these wide belt large pulley drives are bulky, consuming lots of space while requiring high tension leading to high loads, and are poorly suited to closecenters applications, so v belts have mainly replaced flat belts for shortdistance power transmission. Bushings are priced separately and must be added to pulley price. The v belt consists of steel wires, base rubber compound, and protective cover. Vgroove pulleys suitable for normal application for use with the following belt types. When drive center distance is eight times the diameter of the smaller pulley or when drive is operating on vertical shafts,both pulleys should be flanged. Classical v belt pulleys a belt series pitch diameter range groove angle dimensions a w d x s e inches inches inches inches inches 3v under 3,5 3,5 6 6,01 12, over 12 36 38 40 42 0,350 0,350 0,025 0,407 0,344 5v under 10 10 16 over 16 38 40 42 0,600 0,600 0,050 0,688 0,500 8v under 16 16 22,4 over 22,4 38 40 42. To remove the belt, stop the drive with the belt in the position shown, fit. Spring 2009 for information about citing these materials. Based on how pulleys are arranged and how power is transmitted, belt drives are categorised into following types. They build each type of pulley system and calculate its ideal and actual mechanical advantage.

F t f 1 1 2 d 2 solve the previous integral over contact angle and apply f. There are many different types of belts and pulleys, but sizing considerations are similar for most of these drives. Laser pulley alignment systems are now well established in the sheave alignment field. Based on power input possible belt type is a or b assumption belt type a, minimum sheave 75mm therefore, diameter of drive pulley d 75mm diameter of driven pulley d 537. Type of timing pulleys illustrations below indicate stock pulley construction type listed in tables. It calculates pulley drive ratios and the minimal center distance for a designated pulley pair. The belts are available in 3l, a4l, b, c, and d widths in lengths from 5 to 100 ft. The fast pulley is mounted on a shaft with keyed joint and the loose pulley runs.

This is worked out by measuring the cross section of the belt and referring to. If the distance between two pulleys is more, then one side of the belt will be under tension and it is called the tight side. Timing belts, pulleys, chains and sprockets section 1 introduction timing belts are parts of synchronous drives which represent an important category of drives. Link type belts are used to make instant v belt replacements. A belt is a loop of flexible material used to link two or more rotating shafts mechanically, most often parallel. The vgroove transmits torque through a wedging action, thus increasing friction. Quantity, availability and prices on b2b chiaravalli dp p. The boss type pulley is specifically suited for light and medium duty applications. Standard pulley types 2 custom pulleys 2,3 design guide and tolerances 4,5 xl pitch pulleys 6 l pitch pulleys 7 h pitch pulleys 8 xh pitch pulleys 9 t5 pitch pulleys 10 t10 pitch pulleys 11 t20 pitch pulleys 12 at5 pitch pulleys page at20 pitch pulleys 15 htd 5mm pitch pulleys 16 htd 8mm pitch pulleys 17 pulley bar stock inch pitch 18. You can also choose from timing belt, v belt, and flat belt types of belts and pulleys there are 2,343 suppliers who sells types of belts and pulleys on, mainly located in asia. Tail pulleys commonly serve the purpose of a takeup pulley on conveyors of shorter. V belt pulleys and lengths are now defined by means of the datumsystem, which is subject to iso 10811980. The friction between belt and pulley creates the pull force that drives the driven pulley. A practical guide to pulley alignment plant services.

Round belts are a circular cross section belt designed to run in a pulley with a 60 degree vgroove. All power transmission belts are either friction drive or positive drive. Turn the adjustable pulley hand wheel, opening the discs wide, fig. These belts can transmit the same horsepower as classic v belts. F designation in pulley type means pulley is flanged. Instead of belts pulley instead of teeth gears types of chain. This calculator computes belt lengths for various center distances and checks the number of teeth in mesh for both pulleys.

Industrial v belts vbelt construction, types, by size. While the transmission ratio for flat belts is determined by the outer diameter of the pulleys, in the cas of v belts the so. The most notable difference between a v belt pulley and other types of pulleys round belt, flat, etc. Df dm f l bore2 1 mm weight kg flange size1 1recommended flange size i. Use the same type of belts or pulleys per oem specification. In the long run a water pump can only achieve reliable performance with topquality components. Locking type pulley introduction 37 locking type pulley and belt technical information 3841 locking type pulley 38 pitch 4244 locking type pulley 12 pitch 4548 tht high torque type pulleys pulley and belt technical information 49 5mm pitch 5051 8mm pitch 5255 14mm pitch 5660 taperlock style bushings information 61. Pdf pages of our catalog view or download product sections or the complete catalog. Center distance and belt length the minimum pulley diameters recommended for standard v belts are shown in table 3. The number and variety of available belt types is a testament to this.

Hence, they do not slip and there is no relative motion between the two elements in mesh. These time proven cost effective pulleys incorporate plates fillet welded to mild steel bosses which are fitted to the shaft with an interference fit. The main advantages of a plastic belt are that it can design almost any size. This type of belts is used to transmit low power between longdistance510 miters pulleys. Although they have been around for a long time, belts are still a very efficient. Timing belts which run in oil and enable a slimmer engine design. Misumi offers free cad download, short lead times, competitive pricing, and no minimum order quantity. Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel. They learn to use a pulley system in an unconventional manner to increase output distance without increasing input distance. Mechanical analysis belt and chain drives city, university of london.

One end of the rope is attached to the frame and the other end is pulled up to lift the load. Timing belt pulleys, timing belts, pulleys, sprockets, and. V belts, flat belts, wedge belts, synchronous belts and others all have their specific design and. Dimensions in mm unless otherwise stated weights do not include bushings nonfunctional dimensions may vary slightly. Timing pulleys are manufactured to extremely close specifications and are stocked in minimum plain bore, taper bushed and qd bushed styles depending on size and pitch. Round grooves are only suitable for idler pulleys that guide the belt, or when soft oring type belts are used. Nomenclature of vbelt, types of vbelt section and its power rating. Therefore, v belts have a slightly lower efficiency than flat belts approx. Center distance and belt length the relation between center distance and length is given by the following formula.

Characteristically, these drives employ the positive engagement of two sets of meshing teeth. Belt tension to torque let the difference in tension between the loose side f 2 and the tight side f 1 be related to torque t t f. This can be accomplished by several different alignment methods, such as the labor intensive string and straightedge method most common, or by laser. Martintiming pulleys are manufactured to extremely close speci cations and are stocked in minimum plain bore, taper bushed and q. Friction drive belts rely on the friction between the belt and pulley. A moveable pulley has the load attached to the pulley and therefore the pulley moves with the load. Ppt typesofpulleyandbeltsppt powerpoint presentations.

Finer power transmissions pl will not accept liability for any damage. If the drive being calculated is of the vflat type one v pulley and one flat pulley it is necessary. Common belt types shigleys mechanical engineering design type pulley 1. Sep 01, 2001 with this design, belts can be made up of any length, reducing inventory.

Flat belt is the simplest belt type having a rectangular crosssection. The design of pulley systems and the selection of correct belt design and application are by no means simple. Taper lock dynamically balanced dual duty v belt pulleys aspa section 1 to 6 grooves 80800mm pitch circle dia p cd or outer diameter. This formula can be solved for center distance instead of belt length as.

The other side of the belt will be loose and it is called the slack side. V belts have a v shaped crosssection, which rests against the side of v pulley under tension. Due to the greater belt thickness of v belts compared to flat belts, the energy required to bend the belt around the pulleys is higher. Polyamide fabric elastomer body tension members fabric backing depending on finish in addition, there are a few special cases, for instance.

V belt pulley technical specification taper lock hic. There are two pulleys mounted on two parallel shafts. To accommodate these belts the pulleys have v shaped grooves which makes. Spzz3v spaa spbb5v c features our pulleys can be used for application with a speed up to 35 ms. Types, material, applications, advantages, disadvantages pdf. Belts and components the product range pdf en contitech ag.

To be as efficient as possible both for replacement and for new installation, proper selection of pulleys requires the following data that allows the. A timing belt s inspection and change intervals are specified by the vehicle manufacturer. Polyv belts should be run on grooved pulleys for the best transmission of power, however flat pulleys can be used as idlers or even drive pulleys if required. D this is worked out by measuring the cross section of the belt and referring to pages 5 to 12.

Several types of pulleys are used in v belt transmissions, each with different implementation. In drives with only two or three pulleys classical v belts are used for this purpose, in particular with older vehicles. This type of pulley provides a mechanical advantage by reducing the force in half. Illustrations below indicate stock pulley construction type listed in. The intervals depend on the combination of belt type, engine variant and vehicle model. Bushings are priced separately and must be a d eto pu l y ric. Balanced general purpose solid vbelt pulleys without taper bush a section 1 to 5. Ropes and pulleys investigations level a investigations. A spring or ball bearings directly thrusts the pair.

Balata belts are similar to rubber type belts but this is stronger than rubber belt. Here are the different types of belt used in the industries. In open belt drive system the rotation of both the pulleys is in the same. The graphs gives a guiding criterion for the section of the belt. V belts are arguably the most widely used belts in industry. The top countries of suppliers are india, china, and singapore, from which the percentage of types of belts and pulleys supply is 1%, 96%, and 1% respectively.