China manufacturer Cast Iron Small Black Pulley with Good quality

Product Description

Material :Alloy,Cast Iron,Steel
Size: 1/2″ 3/4″ 1″ 1-1/4″ 1-1/2″ 2″ 2-1/2″ 3″
Packing:Gunny bag or carton and pallet / by customer requirements.
Application:Building Material Shops, Manufacturer,General Industry.

Szie weight /pcs
3/4” 26
1” 39
1-1/4” 69
1-1/2” 120
2” 190
2-1/2” 400
3” 500


HangZhou Xinquanxi Metal Products Co.,Ltd. is a professional  forging and casting parts manufacturer with more than 20 years experience with good quality and competitive price.
We are so willing to avail ourselves of opportunity establishing business relation with you.
Our main products are Rigging: turnbuckle (Jis open body, 1480 forging turnbuckle, US type  forging turnbuckle,Rigging Screw),  forging shackle, eye bolt and eye nut, forged hookand special customized products,,  various sets of rings, D ring, master ring, snap hook,Pulley Block, etc.;  
Corner code, expansion bolt, seismic support, guardrail and other building materials.  
Casting pipes, manhole covers, road piles, container buttons, anchors, all kinds of breeding equipment and other casting products. 

1.Are you a factory or a trading company?   
      We have our own foundry and forging factory. The forging plant has 4 production lines and a history of more than 20 years;Foundry has a history of more than 30 years.
2.How do you control your quality?   
      1: Control during r&d at the beginning of production
      2:Production process control
      3:Dimensional control
      4:Tensile tests
      5:Quality inspection before delivery
3.Can we have our product markings on it?
   Yes, we can add product markings according to your requirements.
4.How about packing?
   Woven bag,carton,plywood pallet or by customer requirements.


Shipping Cost:

Estimated freight per unit.

To be negotiated
Certification: CE, ISO
Manufacturing Process: Casting
Material: Alloy,Cast Iron,Steel
US$ 0.2/Piece
1 Piece(Min.Order)


Order Sample



Customized Request

small pulley

What are some real-world examples of small pulley applications in various settings?

Small pulleys find numerous applications in various real-world settings, contributing to the functionality and efficiency of different systems and devices. Here are some examples of how small pulleys are utilized in different industries and everyday situations:

1. Automotive Industry:

– Small pulleys are used in automotive engines to drive various components, such as the alternator, power steering pump, water pump, and air conditioning compressor, through the serpentine belt system. These pulleys help transfer power from the engine to the respective accessories, enabling their operation.

2. Gym and Fitness Equipment:

– Small pulleys are extensively used in gym and fitness equipment, such as cable machines, weight stacks, and exercise pulley systems. They guide the cables and provide resistance, allowing users to perform a wide variety of exercises targeting different muscle groups. The pulleys enable smooth and controlled movement, enhancing the effectiveness of the workouts.

3. Construction and Rigging:

– In construction and rigging applications, small pulleys are used to create mechanical advantage and facilitate the lifting and moving of heavy loads. They are employed in cranes, hoists, and elevators to lift materials or provide leverage for pulling operations. Small pulleys are also used in block and tackle systems to multiply the applied force.

4. Industrial Machinery and Manufacturing:

– Small pulleys are incorporated into various industrial machinery and manufacturing processes. They are used in conveyor systems to guide and transport materials along production lines. Small pulleys also play a role in printing machines, packaging equipment, and textile machinery, helping to control the movement of belts, rollers, and other components.

5. Window Blinds and Shades:

– Small pulleys are employed in window blinds and shades to enable smooth and easy operation. They are used to guide the lift cords or strings, allowing users to raise or lower the blinds or adjust the angle of the slats. The small pulleys ensure the cords or strings move without tangling and provide the desired control over light and privacy.

6. Garage Doors:

– Small pulleys are utilized in garage door systems to facilitate the opening and closing of the doors. They are part of the door’s lifting mechanism and help guide the cables or chains connected to the door panels. The small pulleys ensure smooth and balanced movement, allowing for effortless operation of the garage doors.

7. Sailboats and Sailing Equipment:

– Small pulleys, known as blocks, are extensively used in sailboats and sailing equipment. They are employed to redirect and adjust the tension of lines and halyards, enabling sailors to control the sails and maneuver the boat effectively. Small pulleys are crucial in various rigging systems on sailboats, contributing to efficient sail handling.

8. Home DIY Projects:

– Small pulleys can be found in various home DIY projects and applications. They are used in simple mechanisms, such as homemade elevators or dumbwaiters, to facilitate vertical movement. Small pulleys are also utilized in homemade exercise equipment, storage systems, or small-scale mechanical devices for hobbyists and inventors.

These are just a few examples highlighting the diverse applications of small pulleys in different settings. Small pulleys contribute to the smooth operation, controlled movement, and mechanical advantage in various industries, everyday devices, and DIY projects, enhancing efficiency and functionality.

small pulley

How does the size and diameter of a small pulley affect its performance?

The size and diameter of a small pulley have a significant impact on its performance and functionality within a mechanical system. The dimensions of a small pulley influence various aspects, including power transmission, speed ratios, mechanical advantage, belt tension, and overall system efficiency. Here is a detailed explanation of how the size and diameter of a small pulley affect its performance:

1. Power Transmission:

– The size and diameter of a small pulley directly affect its power transmission capabilities. Larger pulleys have a greater circumference, which allows them to engage a larger portion of the belt or cable. This increased contact area improves the grip between the pulley and the belt, enabling higher power transmission capacity. Smaller pulleys, on the other hand, have a smaller circumference and are suitable for applications requiring lower power transmission.

2. Speed Ratios:

– The size and diameter of a small pulley play a crucial role in determining the speed ratios between the driving and driven components. By utilizing pulleys of different sizes, the rotational speed can be increased or decreased. Larger pulleys on the driving side and smaller pulleys on the driven side result in a speed reduction, while the opposite configuration leads to a speed increase. The selection of the pulley sizes allows for the adjustment of speed ratios to meet specific operational requirements.

3. Mechanical Advantage:

– The size and diameter of a small pulley influence the mechanical advantage it provides. Mechanical advantage refers to the amplification of force achieved by using a smaller driving pulley and a larger driven pulley. As the belt or cable wraps around a larger driven pulley, the force applied to the system is multiplied, making it easier to move or lift heavy loads. The choice of pulley sizes determines the mechanical advantage achieved, allowing for efficient load handling.

4. Belt Tension:

– The size and diameter of a small pulley affect the tension of the belt or cable. Larger pulleys require a greater belt tension to maintain optimal power transmission and prevent slippage. Smaller pulleys, on the other hand, require less tension due to their reduced circumference. Proper belt tension is crucial for ensuring reliable power transmission and minimizing energy losses. The selection of pulley sizes should consider the desired belt tension for the specific application.

5. System Efficiency:

– The size and diameter of a small pulley can impact the overall efficiency of the mechanical system. Smaller pulleys generally require less energy to rotate due to their reduced mass and inertia. This results in lower energy losses and improved system efficiency. Additionally, the correct selection of pulley sizes ensures optimal power transmission, minimizing frictional losses and maximizing the transfer of mechanical energy.

6. Load Capacity:

– The size and diameter of a small pulley influence its load-carrying capacity. Larger pulleys with larger diameters can withstand higher loads due to their increased contact area and grip on the belt or cable. Smaller pulleys, while more compact, have a reduced load capacity. The selection of pulley sizes should consider the anticipated load requirements to ensure safe and reliable operation.

7. Belt or Cable Lifespan:

– The size and diameter of a small pulley can impact the lifespan of the belt or cable. Excessive bending or flexing around small pulleys can subject the belt or cable to increased stress and wear. Larger pulleys, with their larger diameters, result in gentler bending angles and reduced stress on the belt or cable. This can prolong the lifespan of the belt or cable and reduce the frequency of maintenance or replacement.

It is crucial to carefully consider the size and diameter of a small pulley in relation to the specific application requirements. Factors such as power transmission, speed ratios, mechanical advantage, belt tension, system efficiency, load capacity, and belt or cable lifespan should be taken into account to ensure optimal performance and reliability of the mechanical system.

small pulley

What is a small pulley, and how is it different from larger pulleys?

A small pulley refers to a pulley with a relatively small diameter compared to larger pulleys. The size of a pulley is determined by its diameter, which is measured from one edge of the pulley groove to the opposite edge. Small pulleys are typically used in applications where space is limited, or when a higher speed ratio or finer control is required. Here are some key differences between small pulleys and larger pulleys:

1. Size and Weight:

– Small pulleys have a smaller diameter and are generally lighter compared to larger pulleys. This makes them more compact and easier to handle, especially in applications with limited space or where weight is a concern. Small pulleys are often used in compact machinery or equipment, such as handheld tools or small-scale systems.

2. Speed Ratio:

– Small pulleys can provide higher speed ratios compared to larger pulleys. With a smaller diameter, the circumference of the pulley is reduced, resulting in a higher rotational speed for a given input speed. This allows for finer control and higher operating speeds in applications that require precise speed adjustments or where higher RPM (revolutions per minute) is desired.

3. Mechanical Advantage:

– Larger pulleys generally offer a greater mechanical advantage compared to small pulleys. The larger diameter of the pulley allows for a larger contact area with the belt, resulting in increased belt traction and improved power transmission. This makes larger pulleys suitable for applications that require higher torque or when lifting heavier loads.

4. Belt Compatibility:

– Small pulleys are often used with narrower belts, such as V-belts or timing belts with smaller profiles. These belts are designed to fit the smaller groove profiles of small pulleys. In contrast, larger pulleys are typically used with wider belts that can accommodate their larger groove profiles. The choice of pulley size depends on the specific belt type and the desired power transmission requirements.

5. Application Range:

– Small pulleys are commonly employed in applications where space is limited or where precise speed control is critical. They are often found in handheld power tools, small motors, robotics, and intricate machinery. On the other hand, larger pulleys are used in a wide range of applications, including industrial machinery, heavy equipment, conveyor systems, and automotive engines, where higher torque or power transmission capabilities are required.

6. Rotational Speed:

– Small pulleys generally operate at higher rotational speeds compared to larger pulleys. Due to their smaller diameter, they require a higher number of revolutions to cover a specific distance or achieve a desired output speed. This increased rotational speed can be advantageous in applications where rapid movement or precise control is necessary.

It’s important to note that the selection of pulley size, whether small or large, depends on the specific requirements of the application, including power transmission needs, available space, desired speed control, and the type of belt being used. By choosing the appropriate pulley size, optimal efficiency and performance can be achieved in various mechanical systems and equipment.

China manufacturer Cast Iron Small Black Pulley   with Good quality China manufacturer Cast Iron Small Black Pulley   with Good quality
editor by CX