Monthly Archives: January 2021

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Benefits of cogged v belt

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When choosing what type of v-belt to purchase it is important to consider which style will be best for your application. Classic on-cogged v belts are economical when it comes to the upfront cost, but this does not remain true for long-term and frequent usage. Cogged v belts are designed with slots that run perpendicular to the length of the belt, this design greatly decreases bend resistance of the belt. Because they are dimensionally equivalent minus the slots cogged v belts can run on the same pulleys you are already using for standard v belts. This style of belt is especally useful in high-speed compact drives.

The benefits of using a cogged v belt include longer operational life, cooler running, and around a 2% higher efficiency raring than a standard v-belt.

Cost Savings Analysis Example:

Let’s say we are running a 100 horsepower supply air fan motor that is rated at 93% efficient and operates at a consistent load of 75%, and it consumes 527,000 kWh annually. When switching from a 93% efficient (E1) v-belt to a 98% efficient (E2) cogged v belt, with electricity priced at $0.05/ kWh here’s what the savings are and how it is calculated.

Energy Savings= annual energy use x(1 – E1/E2)
= 527,000 kWh/year x(1-93/98)= 26,888 kWh/ year
Annual Savings= 26,888 x $0.05 kWh = $1,345/ annually

This article comes from usarollerchain edit released

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What is the drive belt?

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The drive belt, sometimes called the fan belt, conveys power to a lot of important parts of your car. The alternator, power steering pump, water pump and air conditioning compressor are typically mounted on the front of your engine, and rely on the drive belt to operate.

Each of these parts has a pulley attached, as does the engine crankshaft, and the drive belt wraps around these pulleys. When the engine is running, the crankshaft pulley turns, moving the drive belt, which then turns the accessory pulleys.

There are two basic types of drive belts: V-belts and serpentine belts.

V-belt

These belts get their name from their shape, which tapers from wide to narrow, forming a “V.” Usually, V-belts are found on older vehicles, produced at least a couple of decades ago. In the beginning, only one V-belt — known as a fan belt — was used to drive all of the engine accessories.

As cars became more complex, automakers started adding more accessories to the engine. To compensate, they began using multiple V-belts. Each belt drove one or two of the accessories. For example, one may drive the power steering and alternator, while another drives the water pump.

Some V-belts are relatively smooth on both sides, while others have multiple small grooves on the pulley side. Generally, multi-groove “ribbed” V-belts are more flexible and build up less heat. V-belts can be adjusted via an adjustment pulley, or pivot and adjustment bolts.

Serpentine belt

The serpentine belt is basically just a longer belt that “snakes” around all the engine accessories. It may have grooves on one side or both. Typically, serpentine belts last longer and transmit power more efficiently than V-belts.

Unlike V-belts, serpentine belts aren’t adjustable. Instead, an automatic tensioner is used to keep the belt taut.

This article comes from repairpal edit released

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Types of Belt Drives and How They Improve Efficiency

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In the industrial and commercial sectors, one in three electric motors use belt drives. However, some customers fail to take advantage of the potential energy cost savings of certain industrial belts, which are readily available and cost -efficient. While pulleys control the speed of the equipment, industrial belts are designed to position the motor relative to the load. High efficiency and low maintenance are key components to top performing belt transmission systems.

Types of Belt Drives

V belts

These are the most commonly used types of belt drives. Using a trapezoidal cross section V belts create a wedge action on pulleys to increase friction and improve the belt’s power transfer capability.

Heavy loads often require joined or multiple belts. At the time of installation, V-belts have 95% to 98% peak efficiency. Pulley size, driven torque, under or over-belting, and V belt design and construction impact efficiency. V-belts have a nominal efficiency of 93%, a reduction of 5%, over time if slippage occurs because the belt is not periodically re-tensioned.

Cogged belts

These types of belt drives have slots that run perpendicular to the belt’s length, helping to reduce the bending resistance of the belt. While using the same pulleys as v belts, cogged belts manage to run cooler, last longer, and increase efficiency by 2% from standard v belts.

Synchronous belts

This type of belt drive, often referred to as timing belts, boast a 98% efficiency, which is maintained over a wide load range. These toothed belts require the installation of mating tooth-drive sprockets. Synchronous belts require less maintenance and re-tensioning, operate in wet and oily environments and run slip-free. While synchronous belts are the most efficient, they can be noisy, transfer vibrations, and are unsuitable for shock loads. In such applications, cogged belts are the better choice.

This article comes from grainger edit released

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Various types of V Belts

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V belts are one of the many different types of conveyor belts available. These belts are different from the other varieties because there is only one strand of v belt found underneath the roller bed.

This v belt can be found on one of the sides of the rollers right next to the v belt’s side-frame. These v belts run in the opposite direction from that of whatever contents the v belt is conveying.

These types of v belts are best for light or medium duty loads and are not the best in environments that are moist or oily. One of the great things about these v belts is that in order for the v belt to function, only very light contact between the v belt and the bed rollers is necessary.

This article comes from acebelting edit released

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Why choose a transmission belt?

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As in anytransmission belt  system, the transmission belt allows a mechanical force to be transmitted from one pulley to another. Transmission belts offer an optimal efficiency of 98%; however, they are only suitable for low loads. Once the drive system is aligned, transmission belts can be self-centered by curved pulleys. This type of belt is used in many power transmission applications.

Advantages:

    • In the case of large pulleys, wide transmission belts can be used to provide high power at high speeds (up to 373 kW at 51 m/s).
    • Better efficiency than V-belts, over 98%.
    • Longer service life than V-belts.
    • Very quiet operation.

Large center distance possible.

Most transmission belts are made of rubber or synthetic polymer. Generally, they are strips with both ends joined by stapling or welding. There are also so-called endless or seamless belts that are manufactured in one piece.

This article comes from directindustry edit released

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How to Choose the Right Timing Belt Tooth Profile

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Trapezoidal timing belt tooth profiles include the pitches (distance from the center of one tooth to the center of the next tooth) MXL (.08″) , XL (.2″), L (.375″), H (.5″), XH (.875″), XXH (1.125″). LT (.0816″), T2.5 (2.5mm), T5 (5mm), T10 (10mm), AT5 (5mm), AT3 (3mm), and AT10 (10mm). Trapezoidal timing belt profiles excel at registration and are commonly available. L, H, XH, and XXH are readily available in neoprene with fiberglass reinforcements. T2.5, T5, T10, AT3, AT5, and AT10 belts are typically offered in urethane with steel reinforcements. MXL and XL belts are typically offered in neoprene with fiberglass reinforcements, urethane with kevlar reinforcements, or urethane with polyester reinforcements.

Curvilinear Trapezoidal Timing Belt Tooth Profiles

Curvilinear timing belt tooth profiles include the HTD profiles. Curvilinear profiles were designed for high torque and high speed applications and are an upgrade over trapezoidal profiles for those applications. They also provide better tracking and less backlash than trapezoidal pitches. HTD profiles are measured in the metric pitch sizes of 3mm, 5mm, 8mm, and 14mm.

Modified Curvilinear Trapezoidal Timing Belt Tooth Profiles

Modified Curvilinear timing belt tooth profiles include the PowerGrip GT2, Powerhouse™, Poly Chain GT, and Powerhouse MX™. All of these profiles are less prone to backlash. The PowerGrip GT2 and the compatible Powerhouse™ pitch excel at high speed applications and have excellent tracking. They are offered in 2mm, 3mm, 5mm, 8mm, and 14mm pitches and are typically constructed from neoprene with fiberglass reinforcements. The Poly Chain GT and compatible Powerhouse MX™ excel at high torque applications and also have excellent tracking.

This article comes from bbman edit released

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Types of Power Transmission belts

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Types of power transmission belts Have you ever wonder what is the reference of the v-belt you need? You have the dimensions but you don’t know the reference? We will explain the differences and give you the dimensions

Transmission belts high performance, long service life, uniform geometry, high flexibility, suitable for flat belt transmission. Temperature resistance from -35 ºC to +70 ºC. Limited oil resistant, Antistatic A Section Belt Top Width: ½” Height: 5/16” B Section Belt Top Width: 21/32” Height: 7/16” C Section Belt Top Width: 7/8” Height: 17/32” D Section Belt Top Width: 1-1/4” Height: 3/4” E Section Belt Top Width: 1-½” Height: 29/32”

Fractional Belts Designed for high speed drives and short center distance. Commonly used in low horsepower motors and diesel engines. Great durability, limited oil resistance and antistatic.

Wedge Belts Fabricated with a specially develop high grade elastomer, low stretch tension cord as reinforcement and a wear resistant fabric as cover, to last long and deliver maximum quality suitable for flat belt transmission.

Metric Belts Used where a high power transmission required is needed and the space is reduced. Can transmit 1.5 to 2 times higher powers than classical belts with the same top width.

Banded Belts Used in any application where horsepower capacity or output is needed. Recommended to use where belt vibration or belt whip causes unsatisfactory results where multiple conventional V-belts are used.

Double Sided transmission belts Use to transmit power on both sides of the belt. Commonly used on drives that have one or more reverse bends, such as lawn and garden equipment, conveyors and others.

This article comes from slideshare edit released

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Fan Belt Types

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Note, the alternative fan belt types which are suggested can easily be fitted at the road side without removing the dynamo, but need slight assistance with the starting handle. DO NOT lever the fan belt over the pulleys with screwdrivers etc, the pulleys will and do break as they are cast ! You have been warned. Note that a broken crankshaft pulley is both difficult and expensive to replace.
EARLY TYPE

Originally part number EB 4202, this type is also used when the later high speed water pump and pulley is fitted for cars exported to Switzerland and Australia The fan belt is part number RE 20941, having an inner diameter of 14.523, and an included vee angle of 42 degrees. Its top vee width is 0.920, the fan belt depth 0.50 and the original makers code was V165/ 9R. This specification was drawn up September 1953. An industrial fan belt, number C46, is an alternative fitment and can be positioned over the pulleys easily. The slide adjustment of the dynamo then takes up a position slightly further out producing larger fan belt wrapping around the dynamo pulley.

LATE TYPE

The fan belt which matches this arrangement is part number RE 20950, the included vee angle is 42 degrees, the wide part of the vee is 0.920 and the vee itself some 0.500 deep. The inside diameter of the fan belt is 15.160 and the makers code was V480/9R. An industrial fan belt, number C48, is an alternative fitment and can be positioned over the pulleys easily, unlike the original fan belt. The differences between the fan belt and pulley vee angles are quite normal to establish full fan belt contact under driving load.

This article comes from kda edit released