12C Series Cast Iron QD Sheaves for “C” Belts

Size Bushing Type Type Pitch Diameter Outside Diameter (E) (F) (L) (M) Sheave Weight (LBS)
12C90J J A 9.0″ 9.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 80
12C95J J A 9.5″ 9.90″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 88
12C100J J A 10.0″ 10.50″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 95
12C105J J A 10.5″ 10.90″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 110
12C110J J A 11.0″ 11.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 111
12C120J J A 12.0″ 12.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 127
12C130J J A 13.0″ 13.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 137
12C140J J A 14.0″ 14.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 150
12C160J J A 16.0″ 16.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 170
12C180J J A 18.0″ 18.40″ 2-9/16″ 12-1/4″ 4-5/8″ 5-1/16″ 205
12C200M M A 20.0″ 20.40″ 9/32″ 12-1/4″ 6-3/4″ 5-7/32″ 245
12C240M M A 24.0″ 24.40″ 9/32″ 12-1/4″ 6-3/4″ 5-7/32″ 285
12C300M M A 30.0″ 30.40″ 9/32″ 12-1/4″ 6-3/4″ 5-7/32″ 355
12C360M M A 36.0″ 36.40″ 9/32″ 12-1/4″ 6-3/4″ 5-7/32″ 420
12C440M M A 44.0″ 44.40″ 9/32″ 12-1/4″ 6-3/4″ 5-7/32″ 515
12C500M M A 50.0″ 50.40″ 9/32″ 12-1/4″ 6-3/4″ 5-7/32″ 575

12C series twelve-groove QD bushed sheaves are manufactured for C, CX, banded belts, and CC v-belts; they range from 9.40″ to 50.40″ in diameter. Depending on the sheave size, they are made to use either J or M QD (quick detachable) bushings, which we also stock. Most of our 12C QD sheaves are manufactured from a high-strength grade 35 cast iron, are phosphate-coated, and are painted for anti-corrosion. All of them are balanced at the factory for smooth machinery operation.

12C QD Sheave Size Chart

Features of V-Belt Pulleys

V-Belt Pulleys have several benefits. These include higher operating torque and frictional protection. In addition, they provide mechanical redundancy. These benefits are important for any type of manufacturing process. In this article, we’ll discuss some of these features.

Mechanical redundancy

V-Belt Pulleys are commonly used in automotive applications to transfer power from a stationary motor to a rotating part. They are challenging to design and evaluate due to the complex loading conditions and installation environment. Hence, the design of v-belt pulleys should be carefully considered.

A V-Belt’s cross-section is generally a trapezium with parallel top and bottom sides. The cross-section width, top to pitch distance, and pitch width are all important. A V-belt’s inside and outside lengths are also essential to match the belt and pulley properly. In addition, understanding these dimensions will help you select a V-belt’s proper size and shape for your application.

One significant advantage of v-belt pulleys is their ability to distribute torque between several belts. This allows for more efficient transmission and more excellent load capability. Additionally, V-belts are very durable and can withstand high loads. This means that they can be used in industrial applications with a wide range of horsepower.

Protection from frictional damage

V-Belt Pulleys must be protected from frictional damage. Frictional damage can cause a slipping belt to fail. Fortunately, there are several ways to prevent this problem. These methods include replacing worn pulleys. In addition, modifying the design of a pulley can also improve its durability.

One of the easiest ways to protect v-belt pulleys from frictional damage is to ensure that the belts are correctly aligned. This is critical because misalignment can cause the belt to stretch. When the belt is not aligned correctly, the auxiliary belt span makes initial contact with only 1 side of the groove. This causes excessive belt whip, which can damage the belt and bearings.

V-belts can be protected from frictional damage by using a polyurethane belt. Polyurethane belts are higher in density and coefficient of elasticity than rubber. They also have a higher thermal resistance than rubber.

Higher operating torque

The higher operating torque of V-Belt pulleys is critical for efficient motors and drives. However, the power rating of V-belts depends on several factors. When choosing a V-belt, match the operating torque to the belt’s size. The belt’s strength, the angle of contact between it and the pulley, and the belt speed in m/s are all critical.

The V-Belt comprises a high-10sile cord encased in a rubber or fabric casing. The core provides 10sile strength, while the case forms the friction surface that comes into contact with the pulleys. Different belts are available with other properties such as flame resistance, oil tolerance, and anti-static capacity. Generally, V-Belts are made at an angle of 40 degrees, though this can vary. The tip is needed to accommodate the slight bulging of the side of the belt while flexing around the pulley.

Increased belt width

When comparing V-belt pulleys, it is essential to consider their pitch diameter. This is a factor that affects torque and speed. Ideally, the shaft speed should be 15-20 m/s, and the belt speed should be in the same field.

V-belts are made of high-10sile cords embedded in synthetic rubber. The core provides 10sile strength, while the casing provides friction when the belt is in contact with the pulleys. There are different types of V-belt construction, including anti-static and oil-resistant. Additionally, some types of V-belts are flame resistant or have flame-resistance properties. The belt angle of V-belts is typically 40 degrees, but this can vary slightly. The rise of the belt is crucial because it accommodates the slight bulging of the side of the belt when it flexes around a pulley.

When selecting a V-belt, ensure the belt fits into the groove. If the belt is more comprehensive, the track is more likely to become worn and reduce the belt’s life by 50%. A V-belt should fit within a half-inch of the pulley surface.

Reduced cost

V-Belt-pulley is widely used in induction motor-driven industrial applications. They offer flexible transmission of power at a low cost. However, they are prone to mechanical defects that reduce their efficiency and overall lifetime. Existing methods of testing V-Belt-pulley require physical access to the system and costly sensors to determine the cause of defects.

As V-Belt Pulleys have short centers, they have a small slip margin. In addition, because the belt is elastic, the load exerted on it causes it to stretch, resulting in a loss of efficiency. This effect is commonly referred to as slip.

The design of new V-Belt Pulleys is changing, and the benefits are many. Many of them are lighter and more durable than grey-iron pulleys. Their unique ventilated grooves also help to lower belt temperatures by approximately 17degC. The 10degC reduction translates to an additional 50% longer belt life.

Technological Processing

Company Profile

HZPT is a professional manufacturer of mechanical parts. Our main products are belt pulleys, sprockets, taper sleeves, coupling, and other transmission parts. Its products are mainly exported to Germany, Britain, France, and other European countries, with an annual export value of 18 million U.S. dollars, accounting for more than 65% of the total output. The annual output value reached 200 million yuan.

Our products all adopt international, European, and American advanced industrial standards, use precise and good processing equipment, develop reasonable production technology, apply efficient and flexible management systems, and improve the quality management system to ensure that the product quality is good and the price is affordable.

Our factory adheres to the enterprise concept of “quality: the basis of enterprise survival, integrity: the basis of enterprise development, service: the source of enterprise development, low price: the instrument of enterprise development.” We are always looking forward to the presence of customers at home and abroad, seeking CZPT benefits and joint cause development.

Warehouse Stock

The warehouse covers an area of 5000 square meters and can provide all kinds of standard models A/B/C/Z, with complete quantity and large quantity in stock. Meanwhile, it accepts all sorts of non-standard customization for drawing production. The daily production capacity is 10 tons, and the delivery time is short.

Packaging & Shipping

Experienced Workers Packing Pulleys Carefully, safe wooden cases keep parts from being injured or damaged during sea or air shipment.


Q1. Are you a manufacturer or a trading company?

A: We are a manufacturer and trading company.

Q2. What is your sample policy?

A: We can supply the sample if we have finished parts in stock, but customers need to pay for the sample cost and shipping fee.

Q3. Can you produce according to the samples?

A: We can produce power transmission parts according to your samples or technical drawings. We can build the molds and fixtures.

Q4. Do you test all your goods before delivery?

A: Yes, we have 100% test before delivery.

Q5. Can you customize pulleys?

A: Yes, please send us your drawing for an accurate quotation.

Q6. How long is your delivery time and shipment?

A: 1. Sample Lead-times: 10-20 days.

2. Production Lead-times: 30-45 days after the order is confirmed.

Q7. How do you make our business a long-term and good relationship?

A: 1. We keep good quality and competitive price to ensure our customers’ benefits ;

2. We respect every customer as our friend and sincerely do business and make friends with them, no matter where they come from.

Q8: What are your advantages?

1. The most competitive price and good quality.

2. Perfect technical engineers give you the best support.

3. OEM is available.

Additional information

Mechanical advantages of pulleys

A pulley is a mechanical device used to transmit motion. The device has a variety of uses, including lifting heavy objects. In this article, we will discuss the mechanical advantages, types, common uses and safety considerations of pulleys. We’ll also discuss how to identify pulleys and their components, and what to look out for when using pulleys. Read on to learn more about pulleys.

Mechanical advantages of pulleys

The mechanical advantage of pulleys is that they change the direction of force from 1 direction to another. In this way, the person lifting the heavy object can change its position with minimal effort. The pulleys are also easy to install and require no lubrication after installation. They are also relatively cheap. Combinations of pulleys and cables can be used to change the direction of the load.
The mechanical advantage of a pulley system increases with the number of ropes used in the system. The more cycles a system has, the more efficient it is. If the system had only 1 rope, the force required to pull the weight would be equal. By adding a second rope, the effort required to pull the weight is reduced. This increase in efficiency is known as the mechanical advantage of the pulley.
Pulleys have many uses. For example, ziplines are 1 application. This is a good example of pulleys in use today. Pulley systems can be complex and require a lot of space. Using ziplines as an example, advanced students can calculate the mechanical advantage of multiple pulleys by dividing the work done by each pulley by the remainder or fraction. Regents at the University of Colorado created a zipline with K-12 input.
Another use for pulleys is weight lifting. This technique is very effective when using multiple strands of rope. A single rope going from 1 pulley to the other with just 2 hands is not enough to lift heavy objects. Using a pulley system will greatly increase the force you receive. This power is multiplied over a larger area. So your lifting force will be much greater than the force exerted by a single rope.
The pulley is a great invention with many uses. For example, when lifting heavy objects, pulleys are a great way to get the job done, and it’s easier to do than 1 person. The pulley is fixed on a hinge and rotates on a shaft or shaft. Then pull the rope down to lift the object. A pulley assembly will make the task easier. In addition, it will also allow power to be transferred from 1 rotary shaft to another.

Types of pulleys

If you are an engineer, you must have come across different types of pulleys. Some pulleys come in multiple types, but a typical pulley has only 1 type. These types of pulleys are used in various industrial processes. Here are some common types of pulleys that engineers encounter on the job. In addition to the above, there are many more. If you haven’t seen them in practice, you can check out a list of the different types below.
Fixed pulleys: Fixed pulleys have a roller attached to a fixed point. The force required to pull the load through the fixed pulley is the same as the force required to lift the object. Movable pulleys allow you to change the direction of the force, for example, by moving it laterally. Likewise, movable pulleys can be used to move heavy objects up and down. Commonly used in multi-purpose elevators, cranes and weight lifters.
Composite pulleys combine fixed and movable pulleys. This combination adds to the mechanical advantage of both systems. It can also change the direction of the force, making it easier to handle large loads. This article discusses the different types of pulleys used for lifting and moving. Braided pulleys are an example of these pulleys. They combine the advantages of both types.
A simple pulley consists of 1 or more wheels, which allow it to reverse the direction of the force used to lift the load. On the other hand, dual-wheel pulleys can help lift twice the weight. By combining multiple materials into 1 pulley, a higher ME will be required. Regardless of the type of pulley, understanding the principles behind it is critical.
Pulleys are an important part of construction and mechanical engineering, and their use dates back to Archimedes. They are a common feature of oil derricks and escalators. The main use of pulleys is to move heavy objects such as boats. In addition to this, they are used in other applications such as extending ladders and lifting heavy objects. The pulley also controls the aircraft rudder, which is important in many different applications.

Commonly used

Common uses for pulleys are varied. Pulley systems are found throughout most areas of the house, from adjustable clotheslines to motor pulleys in different machines. Commercially, 1 of the most common uses is for cranes. Cranes are equipped with pulleys to lift heavy objects. It is also common to use pulley systems in tall buildings, which allow tall buildings to move with relative ease.
Pulleys are commonly used in interception and zipline systems, where a continuous rope around the pulley transmits force. Depending on the application, the rope is either light or strong. Pulleys are formed by wrapping a rope around a set of wheels. The rope pulls the object in the direction of the applied force. Some elevators use this system. Pull a cable on 1 end and attach a counterweight on the other end.
Another common use for pulleys is to move heavy objects. Pulleys mounted on walls, ceilings or other objects can lift heavy objects like heavy toolboxes or 2×4 planks. The device can also be used to transfer power from 1 rotating shaft to another. When used to lift heavy objects, pulleys can be used to help you achieve your goals of a good workout.
Pulley systems have a variety of uses, from the most basic to the most advanced. Its popularity is indisputable and it is used in different industries. A good example is timing belts. These pulleys transmit power to other components in the same direction. They can also be static or dynamic depending on the needs of the machine. In most cases, the pulley system is custom made for the job.
Pulley systems can be simple or complex, but all 3 systems transfer energy efficiently. In most cases, the mechanical advantage of a single pulley is 1 and the mechanical advantage of a single active pulley is 2. On the other hand, a single live pulley only doubles the force. This means you can trade effort for distance. Pulleys are the perfect solution for many common applications.

Safety Notice

If you use pulleys, you need to take some safety precautions. First, make sure you’re wearing the correct protective gear. A hard hat is a must to avoid being hit by falling objects. You may also want to wear gloves for added protection. You should also maintain a good distance from the pulley so that nearby people can walk around it safely.
Another important safety measure to take before using a chain hoist is to barricade the area to be lifted. Use marker lines to prevent the load from sliding when moving horizontally. Finally, use only the sprocket set for vertical lift. Always install shackle pins before lifting. You should also wear personal protective equipment such as earplugs and safety glasses when using the chain hoist.
In addition to these safety measures, you should also use cables made from aerospace-grade nylon. They will last many cycles and are made of high quality materials. Also, make sure the cables are lubricated. These measures reduce friction and corrosion. No matter what industry you are in, be sure to follow these precautions to ensure a long service life for your cables. Consult the cable manufacturer if you are unsure of the appropriate material. A company with 60 years of experience in the cable industry can recommend the right material for your system.


Timing Belt Pulley

As one of the leading timing belt pulley manufacturers, suppliers, and exporters of mechanical products, We offer timing belt pulley and many other products.

Please contact us for details.

Manufacturer supplier exporter of the timing belt pulley.

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