China best 6b Qd Bushed Sheaves Pulleys for a and B Belts supplier

Product Description

6B QD Bushed Sheaves Pulleys for A and B Belts

Product Description

6B series pulleys are manufactured for A, AX, AA, 4L, B, BX, BB, and 5L v-belts, ranging from 3.75″ to 38.35″ in diameter. Depending on the pulley size, they are made to use with SD, SK, SF, or E QD bushings, which we also stock. Most of our six-groove 6B QD bushed pulleys 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. The main benefit of using a QD (quick detachable) pulley is that if the bushing (hub) breaks, you don’t have to replace the whole assembly, or if just the pulley gets worn out, the same principle applies. The other significant benefit is that there is a broader range of bore options with QD pulleys than with the “fixed-bore” style.


Product Parameters





Bushing Type

Pulley Type

Pitch Diameter (5L/B)

Pitch Diameter (4L/ A)

Outside Diameter





Pulley Weight (LBS)

6B34SD SD E 3.4″ 3.0″ 3.75″ 3-31/32″ 4-3/4″ 1-13/16″ 1-1/32″ 6.7
6B36SD SD E 3.6″ 3.2″ 3.95″ 3-31/32″ 4-3/4″ 1-13/16″ 1-1/32″ 7.4
6B38SD SD E 3.8″ 3.4″ 4.15″ 3-31/32″ 4-3/4″ 1-13/16″ 1-1/32″ 8.0
6B40SD SD E 4.0″ 3.6″ 4.35″ 3-19/32″ 4-3/4″ 1-13/16″ 21/32″ 8.4
6B42SD SD E 4.2″ 3.8″ 4.55″ 3-19/32″ 4-3/4″ 1-13/16″ 21/32″ 9.0
6B44SD SD E 4.4″ 4.0″ 4.75″ 3-19/32″ 4-3/4″ 1-13/16″ 21/32″ 9.7
6B46SD SD A 4.6″ 4.2″ 4.95″ 21/32″ 4-3/4″ 1-13/16″ 2-9/32″ 10.1
6B48SD SD A 4.8″ 4.4″ 5.15″ 21/32″ 4-3/4″ 1-13/16″ 2-9/32″ 10.6
6B50SD SD A 5.0″ 4.6″ 5.35″ 21/32″ 4-3/4″ 1-13/16″ 2-9/32″ 11.0
6B52SD SD A 5.2″ 4.8″ 5.55″ 21/32″ 4-3/4″ 1-13/16″ 2-9/32″ 12.0
6B54SK SK A 5.4″ 5.4″ 5.75″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 13.0
6B56SK SK A 5.6″ 5.2″ 5.95″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 14.0
6B58SK SK A 5.8″ 5.4″ 6.15″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 14.6
6B60SK SK A 6.0″ 5.6″ 6.35″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 15.0
6B62SK SK A 6.2″ 5.8″ 6.55″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 16.0
6B64SK SK A 6.4″ 6.0″ 6.75″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 17.0
6B66SK SK A 6.6″ 6.2″ 6.95″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 18.0
6B68SK SK A 6.8″ 6.4″ 7.15″ 17/32″ 4-3/4″ 1-15/16″ 2-9/32″ 19.0
6B70SF SF A 7.0″ 6.6″ 7.35″ 27/32″ 4-3/4″ 2-1/16″ 1-27/32″ 20.0
6B74SF SF A 7.4″ 7.4″ 7.75″ 27/32″ 4-3/4″ 2-1/16″ 1-27/32″ 22.0
6B80SF SF A 8.0″ 7.6″ 8.35″ 27/32″ 4-3/4″ 1-15/16″ 1-27/32″ 24.0
6B86SF SF A 8.6″ 8.2″ 8.95″ 27/32″ 4-3/4″ 1-15/16″ 1-27/32″ 26.0
6B94SF SF A 9.4″ 9.0″ 9.75″ 27/32″ 4-3/4″ 1-15/16″ 1-27/32″ 27.0
6B110SF SF A 11.0″ 10.6″ 11.35″ 27/32″ 4-3/4″ 1-15/16″ 1-27/32″ 32.0
6B124SF SF A 12.4″ 12.0″ 12.75″ 27/32″ 4-3/4″ 1-15/16″ 1-27/32″ 29.0
6B136SF SF A 13.6″ 13.2″ 13.95″ 27/32″ 4-3/4″ 2-1/16″ 1-27/32″ 44.0
6B154SF SF A 15.4″ 15.0″ 15.75″ 27/32″ 4-3/4″ 2-1/16″ 1-27/32″ 50.0
6B160SF SF A 16.0″ 15.6″ 16.35″ 27/32″ 4-3/4″ 2-1/16″ 1-27/32″ 54.0
6B184SF SF A 18.4″ 18.0″ 18.75″ 27/32″ 4-3/4″ 2-1/16″ 1-27/32″ 62.0
6B200E E A 20.0″ 19.6″ 20.35″ 7/32″ 4-3/4″ 2-3/4″ 1-25/32″ 74.0
6B250E E A 25.0″ 24.6″ 25.35″ 7/32″ 4-3/4″ 2-3/4″ 1-25/32″ 96.0
6B300E E A 30.0″ 29.6″ 30.35″ 7/32″ 4-3/4″ 2-3/4″ 1-25/32″ 119.0
6B380E E A 38.0″ 37.6″ 38.35″ 7/32″ 4-3/4″ 2-3/4″ 1-25/32″ 134.0


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 US 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 CZPT 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 CZPT 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.



Certification: CE, ISO
Pulley Sizes: Type F
Manufacturing Process: Forging
Material: Carbon Steel
Surface Treatment: Baking Paint
Application: Chemical Industry, Grain Transport, Mining Transport, Power Plant
US$ 9999/Piece
1 Piece(Min.Order)

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The importance of pulleys

A pulley is a wheel that rides on an axle or axle. The purpose of the pulley is to change the direction of the tensioning cable. The cable then transfers the power from the shaft to the pulley. This article explains the importance of pulleys and demonstrates several different uses for this machine. Also, see the Mechanical Advantages section below for the different types. let’s start.

simple machine

A simple pulley machine is a device used to transfer energy. It consists of a wheel with flexible material on the rim and a rope or chain tied to the other end. Then lift the load using the force applied to the other end. The mechanical advantage of this system is one, as the force applied to the load is the same as the force on the pulley shaft.
A simple pulley machine has many benefits, from the ability to build pyramids to building modern buildings with it. Pulleys are also popular with children because they can perform simple tasks such as lifting toys onto a slide, sliding them off the slide, and lifting them up again. These activities, called “transportation” by child development theorists, allow them to learn about the physics of simple machines in the process.
The mechanism works by using cables to transmit force. The cable is attached to one side of the pulley and the other side is pulled by the user. Lift the load by pulling on one end and the other end of the rope. Simple pulley machines have many commercial and everyday applications, including helping move large objects. They can be fixed or movable, and can be a combination of both. The present invention is a great tool for any beginner or engineer.


The axle wheel is the basic mechanical part that amplifies the force. It may have originally appeared as a tool to lift buckets or heavy objects from a well. Its operation is demonstrated by large and small gears attached to the same shaft. When applied to an object, the force on the large gear F overcomes the force W on the pinion R. The ratio of these two forces is called the mechanical advantage.
The ideal mechanical advantage of shaft pulleys is their radius ratio. A large radius will result in a higher mechanical advantage than a small radius. A pulley is a wheel through which a rope or belt runs. Often the wheels are interconnected with cables or belts for added mechanical advantage. The number of support ropes depends on the desired mechanical advantage of the pulley.
In the design of the axle wheel, the axle is the fulcrum and the outer edge is the handle. In simple terms, wheels and axle pulleys are improved versions of levers. The axle pulley moves the load farther than the lever and connects to the load at the center of the axle. Shaft pulleys are versatile and widely used in construction.

rope or belt

Ropes or pulleys are mechanical devices used to move large masses. The rope supports a large mass and can be moved easily by applying a force equal to one quarter of the mass to the loose end. Quad pulleys have four wheels and provide the mechanical advantage of four wheels. It is often used in factories and workshops. It is also a popular choice in the construction industry. If you are installing a pulley in your vehicle, be sure to follow these simple installation instructions.
First, you need to understand the basics of how a rope or pulley works. The machine consists of one or more wheels that rotate on an axle. The rope or belt is wrapped around the pulley and the force exerted on the rope is spread around the pulley. It then transfers the force from one end of the rope to the other. The pulley system also helps reduce the force required to lift objects.
Another common rope or pulley is the differential pulley. This is similar to a rope pulley, but consists of two pulleys of different radii. The tension in the two halves of the rope supports half the load that the live pulley should carry. These two different types of pulleys are often used together in composite pulley systems.

Mechanical advantage

The mechanical advantage is the ratio of the force used to move the load through the pulley system to the force applied. It has been used to measure the effectiveness of pulley systems, but it also requires assumptions about applied forces and weights. In a simple 1:1 pulley system, the weight lifting the weight is the same as the weight of the person pulling the weight. Adding mechanical advantage can help make up for the lack of manpower.
This advantage stems from the mechanical properties of simple machines. It requires less force and takes up less space and time to accomplish the same task. The same effect can also be achieved by applying less force at a distance. Furthermore, this effect is called the output force ratio. The basic working principle of a pulley system is a rope with a fixed point at one end. The movable pulley can be moved with very little force to achieve the desired effect.
The load can be moved through the vertical entry using a simple pulley system. It can use a simple “pulley block” system with a 2:1 “ladder frame” or a 4:1 with dual pulleys. This can be combined with another simple pulley system to create a compound pulley system. In this case, a simple pulley system is pulling another pulley, giving it a 9:1 mechanical advantage.

Commonly used

You’ve probably seen pulley systems in your kitchen or laundry room. You probably already use it to hang clothes on an adjustable clothesline. You may have seen motor pulleys in the kitchens of commercial buildings. You might even have seen one on a crane. These machines use a pulley system to help them lift heavy loads. The same goes for theaters. Some pulleys are attached to the sides of the stage, enabling the operator to move up and down the stage.
Pulley systems have many uses in the oil and petroleum industry. For example, in the oil and gas industry, pulley systems are used to lay cables. They are arranged in a pulley structure to provide mechanical energy. When the rope is running, two pulleys are hung on the derrick to facilitate smooth running. In these applications, pulleys are very effective in lifting heavy objects.
A pulley is a simple mechanical device that converts mechanical energy into motion. Unlike chains, pulleys are designed to transfer power from one location to another. The force required to lift an object with a pulley is the same as that required by hand. It takes the same amount of force to lift a bucket of water, but it’s more comfortable to pull sideways. A bucket of water weighs the same as when lifted vertically, so it’s easy to see how this mechanism can be useful.

Safety Notice

When using pulleys, you should take several safety precautions to keep your employees and other workers on the job site safe. In addition to wearing a hard hat, you should also wear gloves to protect your hands. Using pulleys can lead to a variety of injuries, so it’s important to keep these precautions in mind before using pulleys. Here are some of the most common:
Pulleys are an important piece of equipment to have on hand when lifting heavy objects. Pulleys not only reduce the force required to lift an object, but also the direction of the force. This is especially important if you are lifting heavy objects, such as a lawn mower or motorcycle. Before starting, it is important to make sure that the anchoring system can support the full weight of the object you are lifting.
When using a pulley system, make sure the anchor points are adequate to support the load. Check with the pulley manufacturer to determine the weight it can safely lift. If the load is too large, composite pulleys can be used instead. For vertical lifts, you should use a sprocket set and wear personal protective equipment. Safety precautions when using pulleys are critical to worker health and safety.

China best 6b Qd Bushed Sheaves Pulleys for a and B Belts   supplier China best 6b Qd Bushed Sheaves Pulleys for a and B Belts   supplier
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