China high quality Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley crankshaft pulley

Product Description

Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley

Product Description


Idler rollers, or sometimes simply known as conveyor rollers, are cylindrical-shaped bars that run along and underneath a conveyor belt. There are many different types of idler rollers with varying functions.

Usually, idler rollers aid in the supporting of weight and impact of the materials being transported along the belt. They also assist in the smooth, continuous movement of the material along the belt.

Idler rollers can be self-aligning and assist in maintaining the belt tracking. Depending on the structure and shape of the conveyor belt, the rollers are usually positioned within a metal frame and are known as idler sets.

Detailed Photos

Product Parameters

Diameter 60-219mm
Length 100-3500mm
Tube Q235(GB)
Shaft 45# steel(GB) equal to C45
Bearing Single & Double Row Deep Groove Ball Bearing 2RZ&2Z wigh C3 clearance
Grease Lithium soap type grease,grease retaining inner seal with Multi-stage Labyrinth and Retention Cap with Outboard Rubbing Flinger
Lubrication Grease is Lithium soap type grease with Rust Inhibitors
Welding Mixed gas shielded arc welding end


Ordinary painting, hot galvanized painting, electric static spraying painting, baked painting



Bearing model












308 310



308 310




Packaging & Shipping

Company Profile


ZheJiang CHINAMFG Rubber Products Co., Ltd is a leading professional manufacturer of conveyor belts & conveyor accessories in China. The main workshops cover 20,000 square CHINAMFG in the total 60,000 square CHINAMFG of the plant. The applied technology and equipment in the advanced production lines are state of the art in the industry. The sales headquarters is located in the capital of China, ZheJiang with branches in domestic and abroad.

It specializes in following 3 series: 1) Heavy-duty Conveyor Belt, including universal EP/NN and CC Belt, Chevron Belt, Oil Resistant Belt, Abrasion Resistant Belt, Heat Resistant Belt, Fire Resistant Belt, Chemical Resistant Belt, Sidewall Belt, Flat Transmission Belts, 2) Rubber Sheets, including SBR, NBR, NR, CR, EDPM, Rubber With Insertion 3) Conveyor accessories. These 3 series of products conform to RMA, DIN, ASTM and ISO specifications.

Its products, honored with “The most Advanced level of Products” by the Committee of Science and Technology, have been widely used in mining and quarrying, power stations, steel plants, bulk cargo terminals, cement industry, and other material handling fields. With great success in domestic market, it has been focusing on global market with several hundreds of foreign valued customers in Asia, South America, North America, Africa and Europe.

The company mission:

1.Supply one-stop outstanding service to global customers.
2. Engage in complete solutions with conveyor belting and power transmission belting.
3. Persist in technology improvement and quality control in the whole process of production and service.


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Material: Steel
Application: Chemical Industry, Grain Transportation, Mining Transport, Power Plant
Structure: Ordinary Roller
Bearing Type: Double Sealed Bearing
Type: Parallel Conveyor Idler
Dimension(L*W*H): Variable
US$ 1/Piece
1 Piece(Min.Order)

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variable pulley

How do you select the right variable pulley configuration for a specific task?

Selecting the right variable pulley configuration for a specific task involves considering several factors. Here are the key steps in the selection process:

1. Define the Requirements:

Start by clearly defining the requirements of the task or application. Determine the desired speed range, torque, power transmission capacity, and any specific control requirements.

2. Evaluate Speed Variation:

Assess the required speed variation range. Consider whether a stepless or stepped speed variation is needed and determine the desired number of speed settings.

3. Consider Torque and Power:

Evaluate the torque and power requirements of the task. Calculate the maximum torque and power that the variable pulley configuration needs to handle to ensure reliable and efficient operation.

4. Assess Space and Installation Constraints:

Consider the available space for the variable pulley configuration and any installation constraints. Evaluate the physical dimensions, mounting options, and compatibility with the existing machinery or equipment.

5. Determine Adjustability and Control:

Determine the level of adjustability and control required for the task. Assess whether manual adjustment or automated control is needed, and consider the ease of adjustment and precision required.

6. Evaluate Maintenance and Durability:

Consider the maintenance requirements and durability of the variable pulley configuration. Assess factors such as the expected lifespan, maintenance intervals, and availability of spare parts.

7. Seek Expert Advice:

If necessary, consult with experts or manufacturers who specialize in variable pulley systems. They can provide valuable insights and recommendations based on their expertise and experience.

By carefully evaluating these factors, you can select the right variable pulley configuration that meets the specific requirements of your task or application. It is essential to consider the performance, functionality, and compatibility of the variable pulley system to ensure optimal results and long-term reliability.

variable pulley

Can variable pulleys be used in both industrial and DIY applications?

Yes, variable pulleys can be utilized in both industrial and DIY (Do-It-Yourself) applications. The versatility and adjustability of variable pulleys make them suitable for a wide range of uses, from large-scale industrial machinery to smaller DIY projects. Here’s a closer look at how variable pulleys are applicable in both contexts:

Industrial Applications:

In industrial settings, variable pulleys are commonly employed in various types of machinery and equipment for speed control and power transmission. Some notable industrial applications of variable pulleys include:

  • Conveyor Systems: Variable pulleys are used in conveyor systems to adjust the speed of the conveyor belts, allowing for efficient material handling and sorting processes.
  • HVAC Systems: Variable pulleys can be found in heating, ventilation, and air conditioning (HVAC) systems to regulate fan speeds and control airflow, optimizing energy efficiency and comfort.
  • Machine Tools: Variable pulleys are utilized in machine tools such as lathes, milling machines, and drill presses, enabling operators to adjust the rotational speed for different machining operations.
  • Automotive Industry: Variable pulleys are employed in automotive applications, such as continuously variable transmissions (CVT), where they allow for seamless speed adjustments and improved fuel efficiency.
  • Industrial Mixers and Agitators: Variable pulleys are used in mixers and agitators to control the rotational speed of blades or paddles, ensuring proper mixing and blending of materials.

DIY Applications:

In DIY applications, variable pulleys can be utilized by hobbyists, enthusiasts, and individuals working on personal projects. Some common DIY applications of variable pulleys include:

  • Power Tools: DIY enthusiasts often incorporate variable pulleys into homemade power tools, such as belt sanders, drill presses, and grinders, to achieve adjustable speed control.
  • Garden and Yard Equipment: Variable pulleys can be used in DIY projects involving garden and yard equipment, such as lawnmowers or leaf blowers, to adjust the speed of the cutting blades or the airflow.
  • Small Machinery: Variable pulleys can be applied in DIY projects involving small machinery, such as mini lathes or mini milling machines, allowing users to customize the rotational speed for specific tasks.
  • Experimental Setups: Variable pulleys can be incorporated into DIY experimental setups or scientific projects where adjustable speed control is required, such as in physics experiments or mechanical demonstrations.

The adaptability of variable pulleys makes them suitable for a wide range of applications, both in industrial and DIY contexts. Whether it’s for large-scale industrial machinery or small-scale personal projects, variable pulleys provide a flexible and efficient means of achieving adjustable speed control and power transmission.

variable pulley

How does a variable pulley assist in changing the speed and power transmission?

A variable pulley, also known as a variable speed pulley or a variable drive pulley, plays a crucial role in changing the speed and power transmission in mechanical systems. Let’s explore how it accomplishes these functions:

1. Speed Adjustment:

A variable pulley allows for continuous speed adjustment by changing the effective diameter of the pulley system. When the movable pulley half is positioned closer to the fixed pulley half, the effective diameter increases. This results in a larger belt or chain contact area and a higher speed ratio between the input and output shafts. Conversely, when the movable pulley half is positioned farther away, the effective diameter decreases, leading to a smaller contact area and a lower speed ratio. By adjusting the position of the movable pulley half, the speed of the driven components can be precisely controlled without the need for manual gear changes or transmission adjustments.

2. Power Transmission:

A variable pulley transfers power from the input shaft to the output shaft through the belt or chain. By changing the speed ratio, the variable pulley adjusts the rotational speed of the output shaft relative to the input shaft. This allows for optimization of power transmission in mechanical systems. For example, in applications where high torque is required, the variable pulley can be adjusted to provide a lower speed ratio, resulting in increased torque at the output shaft. Conversely, when higher speeds are desired, the variable pulley can be adjusted to provide a higher speed ratio, sacrificing some torque in favor of increased rotational speed.

3. Smooth Transitions:

One of the advantages of a variable pulley is its ability to provide smooth transitions between different speed ratios. The actuation mechanism associated with the variable pulley allows for precise and controlled movement of the movable pulley half. This enables gradual adjustments in the effective diameter, ensuring seamless speed changes without sudden jolts or disturbances in power transmission.

4. Flexibility and Adaptability:

Variable pulleys offer flexibility and adaptability in mechanical systems. They can accommodate different load conditions, operational requirements, and variations in input power. By adjusting the position of the movable pulley half, the speed and power transmission characteristics can be tailored to suit specific needs, resulting in efficient and optimized performance.

Overall, a variable pulley assists in changing the speed and power transmission by providing continuous speed adjustment, optimizing power transfer, enabling smooth transitions, and offering flexibility in mechanical systems. Its ability to precisely control speed ratios without the need for manual gear changes makes it a valuable component in various applications, ranging from automotive systems and manufacturing machinery to exercise equipment and power transmission systems.

China high quality Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley   crankshaft pulley	China high quality Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley   crankshaft pulley
editor by CX


variable pulley

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