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When should a timing belt be done on a car?

Replace the timing belt according at the mileage interval specified by the manufacturer

There is a major difference between a timing chain and timing belt. If the vehicle has a timing chain, there is no interval for changing it as a regular maintenance service procedure. However, if the vehicle has a timing belt, there is a very specific interval for replacing it. Timing belt replacement is generally recommended every 60,000 to more than 100,000 miles, depending on the vehicle manufacturer. Check ChiltonDIY’s maintenance schedules or the owner’s manual to determine the recommended service interval for your vehicle.

Why Does Regular Timing Belt Replacement Matter?

If the timing belt is not replaced when recommended, it can break. In the case of interference engines, which are manufactured with extremely close tolerances, a broken timing belt will cause the valves to hit the pistons, resulting in serious internal engine damage. Even if you do not have an interference-fit engine, a broken timing belt can leave you stranded, causing massive headaches and expensive engine damage.

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How are the V belts specified?

V belts are NOT measured by diameter nor folding the v belt in half. The most accurate way to measure the circumference of a v belt is with a v belt measuring tool or using a cloth tape measure (Not a steel tape measure or ruler). An additional option is to wrap a small diameter string/rope around the v belt, then measure the length of the string. When measuring be sure to have the v belt under slight tension and the cloth tape measure is tightly against the back of the v belt. Also, keep in mind v belts do stretch and unfortunately there is no specific value for how much a v belt can stretch. You’ll also need to measure the width and depth to determine which section v belt you have.

How to determine the v belt number

All A,B,C,D,E,AX,BX belts list the inside circumference measurement after the letter of the v belt part number. Example: A88 has a 88″ inner circumference, then you add 2 inches for the A Section (Listed below) to obtain the outer circumference. If you measure the outer circumference, then you would subtract the number of inches based on the section you have (Listed below) to obtain the v belt number. This is also the same for the banded belts. Measure each individual band for banded v belts to obtain the correct width.

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How To Identify the 3 Timing Belt Construction Types

We offer three types of timing belt construction, each for a different kind of application. Knowing what these three types are and how to identify them is the first step in specifying a belt for a new design or for placing a reorder on a replacement belt.

Timing Belt Construction Types: Each type is specified by a letter code.

Open-Ended “M” for linear drive applications
Spliced and Welded “V” for conveying applications
Truly Endless “BFX” for power transmission applications

Open-ended timing belts have a high spring rate and excellent tooth shear strength. If you are looking for a linear drive with stiffness and high repeatability, we recommend steel tension members over aramid fiber.

Spliced and welded timing belts are used in many general purpose applications. They are the preferred construction type for conveying, as well as for welded profiles and backings. We are able to machine these belts and they are available in most tooth configurations.

Truly endless code BFX polyurethane timing belts are extruded without a weld. This gives you the strongest belt construction type making it ideal for power transmission applications. They have steel tension members as a standard and are available in multiple material versions. The most popular tooth configuration is AT for more tooth shear strength. Double-sided BFX timing belts are also available for drive systems that change shaft direction. Custom lengths are available.

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Understanding Drive Belt Maintenance

Proper drive belt maintenance is important to keep equipment running as efficiently as possible and to keep the various drive components from wearing prematurely. Sheaves and drive belts wear much more quickly than they should when excess slippage occurs.

Poor drive maintenance isn’t always a personnel issue – often drives are not easily accessed or production requirements dictate that equipment just isn’t available for routine maintenance checks by maintenance staff. Often the first indication of a problem shows up when a machine operator notices unusual noises or smells coming from the area of the drive or, worst case, the machine stops running suddenly.

Drive belt can be monitored while running by looking and listening.

At some point changes in ratio may have been desired to increase or decrease the output speed so someone changed one of the sheaves to change the speed. Maybe a 15 HP motor that was on the shelf in stores was installed when the 10 HP motor on the drive failed. Could be the machine that used to run only one shift per day for 5 days is now running 24/7. Changes like these can greatly affect belt life.

A properly designed and maintained drive belt should give a minimum of 1 year of belt life on a tough application – more on less demanding applications. If you aren’t satisfied with the life of belts on a drive, your supplier can help – a drive analysis and redesign may be necessary to eliminate the excessive downtime and production losses. An entire new drive belt is much less costly than one downtime incident.

V-belt drives are reasonably efficient when all the components are new and care is taken to properly tension and align the drive at installation. More efficient options are available if energy savings are the goal and in many jurisdictions, there are government / utility incentives to change from v-belts to synchronous drive belt. If you are using too many v-belts on an application, this would be a good time to consider making a change.

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Where are V belts used?

The environmental and operating conditions to which the v belt will be subjected significantly influence what type would be ideal.

Some of the factors to consider include operating speeds, intermittent or continuous operation, misalignment tolerance, layout (e.g., serpentine or quarter turn), transmitted power, v belt efficiency, and exposure to harsh conditions (e.g., extreme temperatures, abrasives, ozone, and oils).

Depending on what factors are critical, industry professionals may choose from a wide range of light-duty or heavy-duty, industrial v belts.

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Poly v belt comprising a layer of thermoplastic material

A poly v belt comprising a body in an elastomeric material, preferably EPDM, a plurality of durable filiform inserts longitudinally embedded in the body, and a coupling portion integrally connected to the body and comprising a plurality of V-shaped ribs, side by side and alternating with V-shaped grooves.

According to the poly v belt, comprised a layer of a thermoplastic material that at least partially covers the ribs, and a knitted fabric arranged over the thermoplastic material. Preferably, the thermoplastic material comprises a polyolefin irradiated with a dose comprised between 60 and 140 kGy.

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Introduction of drive belt

Drive belt consists of two pulleys over which an endless belt it passed over them. The mechanical power or rotary motion is transmitted from the driving pulley to the driven pulley because of the frictional grip that exists between the drive belt and the pulley surface.

The portion of the drive belt which is having less tension is called slack side and the one which has higher tension is called tight side. The effective pulling power of the drive belt that causes the rotation of the driven pulley is the difference in tension on the slack and tight side.

The tensions in the tight and slack sides of the drive belt depend on the angle of contact, the drive belts have to be arranged such that the slack side comes above and the tight side comes below the pulleys.

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What do V belt numbers mean?

1) Classical v belt – Classified by its dimensions ranging from A to E

The classical v belt is the most common of all v belt types, and it has been in existence even before other v belt types. This type of v belt has a broad scope of usage in different areas such as Agriculture, Industrial Machinery, ventilation etc. and this is due to the fact that it covers a load range from 1 horsepower to 500 horsepower. There is no doubt that the Narrow Wedge is more efficient than the classical v belt; however, they work seamlessly with higher bearing loads and have a high tolerance for adverse operating conditions.

2) Narrow Wedge – Classified by its dimensions ranging from 3V, 5V, and 8V

This type of v belt is more efficient than the Classical type as they have the most significant degree possible for the distribution of force and load transfer, which is the main advantage over the Classical type. Narrow Wedge is able to transmit three times the Horsepower a classical v belt would in the same drive space; they are very suitable for drives at high speed and its well-known for its sturdy, compact size. Unlike the classical v belt, Narrow Wedge can handle drives from 1 horsepower to 1,000 horsepower.

3) Fractional Horsepower – Classified by its dimensions ranging from 2L, 3L, 4L, 5L.

Unlike the two mentioned types of v belts, the Fractional Horsepower is different in operation as it is only designed for light loads and is often used as a single belt on drives that run at one Horsepower or even less. This type of belt is what you see in domestic machines popular in household equipment such as washing machines, fans, and refrigerators. Fractional Horsepower can never be used on any heavy-duty industrial machinery even if it fits perfectly well.

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Types of Conveyor Belts

Fabric Conveyor Belts are Named According to Different Carcass: Cotton Conveyor belt, Nylon Belt, Ep Conveyor Belt.

Nylon Conveyor Belt: Under Condition of middle. Heavy loading capacity, high speed, strong lash and high vulnerability.

EP Conveyor Belt: Under condition of middle distance, heavy loading capacity, high speed conveying, good flexing capacity, trough able, heat resistant, low lad elongation.

Cotton Conveyor Belt: Suitable for middle distance conveying.

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What are the advantages of the rubber conveyor belt material?

Rubber conveyor belt materials can be divided into PVC (polyvinyl chloride), PU (polyurethane), PE (polyolefin), Si (silica gel). Below we will do some analysis on the advantages and disadvantages of these several conventional materials.

1, Economical application. The price of the rubber conveyor belt should be considered in the actual use process, so economic efficiency should be considered.

2, Easy to process, PVC rubber conveyor belt is relatively easy to process in the processing process, good plasticity;

3, Acid and alkali resistance, PVC rubber conveyor belt is chemically stable, has a certain ability to resist weak acid and weak base.

This article comes from xinbex edit released