China factory 2vp36 2vp Two Grooves Variable Speed Cast Iron V Belt Pulleys for 3L, 4L, 5L, a, B, or 5V Belt pulley bearing

Product Description


Product Description

Cast iron V belt pulley Cast Iron with Taper bore

With more than 15 years’ experience, high-precision equipment and strict management system, CIMO can provide V belt pulley  for you with stable quality and best service.

V belt pulley specifications:

V-Belt Pulley Type Light Duty Bored to size Pulleys (AK,BK,2AK,2BK,3BK series)
Light Duty Taper Bore Pulleys (AK-H,BK-H,2AK-H,2BK-H series)
Split taper bushed Pulleys (1TB,2TB,3TB series)
Heavy Duty QD Pulleys (1B,2B,3B,1C,2C,3C,4C,5C series etc)
Light Duty Variable Speed Pulleys (1VP,2VP,1VL,1VM series)
QD taper bore sheaves Pulleys (3V,5V,8V series)
Single Groove Pulleys (OK,OL,AL series)
According to customers’ requirements or drawings
Materials Cast iron, steel, aluminium ,alloy, ect.
Surface treatment powder coating, zinc plating, black oxided,etc
Standard ANSI.API.BS.DIN.JIS.GB.etc.
Machine equipment CNC center, CNC milling machine,CNC turning machine, CNC drilling
machine, CNC lathes, lathe, 4 axis machine etc.
Application field Equipment accessories, Airplane, Ship, Bicycle, Motorcycle, Auto, Medical,Chemical, Wheel, Sports, Anchor, Weapon, etc.
Certification ISO9001:2015
Warranty One year after shippment
QC 1. Materials are to be checked carefully before production.
2.Strict processing quality control
3.100% inspection before shipment.
Inspection Equipment CMM, Projection, Calipers, Micro caliper, Thread Micro caliper;Automatic Two / Three Coordinate Measuring Instrument etc;Third party inspection avaliable CHINAMFG customer’s requirements



Detailed Photos



Large stock in warehouse



Packaging & Shipping


Export wooden box



Q1: Are you trading company or manufacturer ?

A: We are factory.

Q2: How long is your delivery time and shipment?
1.Sample Lead-times: 10-20 days
2.Production Lead-times: 30-45 days after order confirmed.

Q3: What is your advantages?
1. The most competitive price and good quality.
2. Perfect technical engineers give you the best support.
3. OEM is available.


Certification: ISO
Manufacturing Process: Casting
Material: Iron
Surface Treatment: Phosphated
Application: Chemical Industry, Grain Transport, Mining Transport, Power Plant
Bore: Pilot Bore, Taper Bore


Customized Request

variable pulley

How do variable pulleys contribute to energy efficiency in industrial processes?

Variable pulleys play a significant role in enhancing energy efficiency in industrial processes. By providing precise control over speed and load adaptation, variable pulleys offer several benefits that contribute to reducing energy consumption and optimizing overall efficiency. Here are some ways in which variable pulleys contribute to energy efficiency:

  1. Optimized power transmission: Variable pulleys efficiently transmit power from the input shaft to the output shaft, minimizing energy losses. By adjusting the position of the pulley’s movable flanges, the effective diameter of the pulley changes, allowing for optimal power transmission based on the load requirements. This efficient power transmission reduces energy waste and ensures that the machinery operates at its optimum power efficiency.
  2. Speed control: One of the primary advantages of variable pulleys is their ability to control the speed of machinery. By adjusting the pulley’s effective diameter and changing the speed ratio between the input and output shafts, operators can match the speed of the machinery to the specific requirements of the process. This prevents over-speeding or under-speeding of the equipment, resulting in energy savings by avoiding unnecessary power consumption.
  3. Load adaptation: Variable pulleys allow machinery to adapt to varying load conditions. By adjusting the pulley’s setting, operators can vary the torque and speed output of the system to match the requirements of the load. This load adaptation ensures that the machinery operates at the most efficient operating point, minimizing energy waste and improving overall energy efficiency.
  4. Efficient process control: Variable pulleys enable precise adjustments in speed and torque, providing better control over industrial processes. This control allows operators to optimize the process parameters based on energy efficiency considerations. For example, in applications where a slower speed can achieve the desired outcome, operators can adjust the pulley settings accordingly, reducing energy consumption while maintaining process effectiveness.
  5. Reduced mechanical losses: Variable pulleys help minimize mechanical losses in industrial processes. By avoiding fixed-speed operation and using variable speed control, the machinery can avoid unnecessary friction and wear associated with running at higher speeds than required. This reduction in mechanical losses contributes to energy efficiency and can extend the lifespan of the equipment.
  6. Energy recovery: In certain industrial processes, variable pulleys can enable energy recovery systems. For example, in applications where the machinery produces excess energy during certain phases, variable pulleys can be adjusted to recover and utilize that energy elsewhere in the process. By capturing and reusing this energy, overall energy consumption can be reduced, leading to improved energy efficiency.

The precise control and load adaptation capabilities of variable pulleys make them valuable tools in optimizing energy efficiency in industrial processes. By reducing energy waste, enhancing process control, and minimizing mechanical losses, variable pulleys contribute to significant energy savings and promote sustainable industrial operations.

variable pulley

What is the significance of proper alignment and tensioning in variable pulley systems?

Proper alignment and tensioning play a crucial role in the performance, efficiency, and longevity of variable pulley systems. The significance of these factors can be understood as follows:


Proper alignment of variable pulleys ensures that the input and output shafts of the machinery are precisely positioned in relation to each other. Here are some key points highlighting the significance of alignment:

  • Efficient Power Transmission: Accurate alignment allows for optimal power transmission from the input to the output shaft. Misalignment can cause increased friction, energy loss, and reduced efficiency, leading to unnecessary wear and tear of the pulleys and belts.
  • Reduced Vibration: Proper alignment minimizes vibration in the pulley system. Vibrations can not only affect the smooth operation of machinery but also contribute to premature wear of components, increased noise levels, and decreased overall performance.
  • Prevention of Premature Wear: Misalignment can result in uneven belt wear, leading to premature belt failure. By ensuring proper alignment, the load is evenly distributed across the belt, reducing wear and extending the lifespan of both the belt and the pulleys.
  • Protection of Components: Correct alignment helps protect the pulleys, belts, bearings, and other components of the variable pulley system from excessive stress and strain. It prevents unnecessary friction, heat generation, and component fatigue, thereby reducing the likelihood of breakdowns and costly repairs.


Proper tensioning of the belts or chains used with variable pulleys is equally important. Here are some reasons highlighting the significance of tensioning:

  • Optimal Grip and Power Transmission: Proper belt tension ensures that the belt maintains sufficient grip on the pulleys, facilitating efficient power transmission. Insufficient tension can cause slippage, resulting in decreased performance, loss of torque, and potential damage to the pulleys and belts.
  • Prevention of Belt Damage: Over-tensioning or under-tensioning the belt can lead to excessive stress on the belt material, causing stretching, cracking, or premature wear. By maintaining the correct tension, the belt operates within its design limits, minimizing the risk of belt failure.
  • Reduced Vibrations and Noise: Proper tensioning helps minimize belt vibrations, reducing noise levels and providing a smoother and quieter operation of the variable pulley system.
  • Extended Belt and Pulley Lifespan: Optimal tensioning reduces the wear and tear on both the belt and the pulleys. It helps maintain the integrity of the belt material and prevents excessive forces on the pulley components, contributing to longer lifespans for these critical elements.

In summary, proper alignment and tensioning are essential for the reliable and efficient operation of variable pulley systems. Accurate alignment ensures efficient power transmission, reduced vibration, and prevention of premature wear, while proper tensioning facilitates optimal grip, power transmission, and extends the lifespan of belts and pulleys. By paying attention to these factors, operators can maximize the performance and longevity of their variable pulley systems.

variable pulley

What types of belts are typically employed with variable pulleys?

Variable pulleys, also known as variable speed pulleys or variable drive pulleys, are compatible with various types of belts. The choice of belt depends on factors such as the specific application, power transmission requirements, and environmental conditions. Here are some types of belts commonly employed with variable pulleys:

1. V-Belts:

V-belts are one of the most common types of belts used with variable pulleys. They have a trapezoidal cross-section and are designed to fit into V-shaped grooves on the pulley halves. V-belts are known for their high friction grip, which allows for efficient power transmission. They can handle moderate to high-speed ratios and are suitable for applications requiring reliable power transfer.

2. Flat Belts:

Flat belts have a rectangular cross-section and are widely used with variable pulleys. They offer flexibility and are capable of transmitting high power loads. Flat belts typically have fabric or rubber coatings on both sides to enhance grip and prevent slippage. They are commonly used in applications where a wide speed range and high torque transmission are required.

3. Timing Belts:

Timing belts, also known as synchronous belts, are toothed belts that mesh with corresponding teeth on the pulley halves. They provide precise power transmission and are often used in applications where accurate timing and synchronization are critical. Timing belts are commonly employed in automotive engines, robotics, and other precision machinery.

4. Poly-V Belts:

Poly-V belts, also called multi-rib belts, have multiple V-shaped ribs on the inner surface. They are designed to fit into corresponding grooves on the pulleys. Poly-V belts offer high power transmission capabilities and are suitable for applications that require compact designs and high-speed ratios. They are commonly used in automotive accessory drives, such as alternator and power steering systems.

5. Round Belts:

Round belts, as the name suggests, have a circular cross-section and are commonly made of rubber or urethane materials. They provide flexibility and are often used in applications that require minimal vibration and noise. Round belts are suitable for light to moderate power transmission and are commonly used in applications such as office equipment, textile machinery, and small appliances.

It’s important to note that the selection of the appropriate belt for a variable pulley should consider factors such as load requirements, speed range, temperature constraints, and environmental conditions. Consulting the manufacturer’s specifications and recommendations can help ensure the optimal belt choice for a given application.

China factory 2vp36 2vp Two Grooves Variable Speed Cast Iron V Belt Pulleys for 3L, 4L, 5L, a, B, or 5V Belt   pulley bearing	China factory 2vp36 2vp Two Grooves Variable Speed Cast Iron V Belt Pulleys for 3L, 4L, 5L, a, B, or 5V Belt   pulley bearing
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variable pulley

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