China Good quality Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley pulley alternator

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

How do variable pulleys contribute to the functionality of exercise equipment like treadmills?

Variable pulleys play a crucial role in the functionality of exercise equipment, such as treadmills. They enable users to adjust and control various aspects of their workout experience. Here are some ways in which variable pulleys contribute to the functionality of treadmills:

Speed Control:

Variable pulleys in treadmills allow users to control the speed at which the treadmill belt moves. By adjusting the position of the variable pulleys, users can increase or decrease the speed of the belt, providing flexibility to accommodate different workout intensities and fitness goals. Speed control is an essential feature that allows users to customize their workouts and gradually increase or decrease the intensity as needed.

Workout Programs:

Treadmills often come equipped with pre-programmed workout programs that simulate various terrains, such as hills or intervals. Variable pulleys are used in conjunction with these programs to automatically adjust the incline or resistance levels of the treadmill. By altering the position of the variable pulleys, the treadmill can mimic uphill climbs or simulate different levels of resistance, providing users with a more challenging and varied workout experience.

User Comfort:

Variable pulleys also contribute to user comfort on treadmills. By allowing users to adjust the speed and intensity of their workouts, variable pulleys ensure that individuals can exercise at a pace that suits their fitness level and preferences. Whether users prefer a leisurely stroll or an intense sprint, the ability to control the speed through variable pulleys provides a comfortable and personalized workout experience.

Safety Features:

Variable pulleys in treadmills are often equipped with safety features, such as emergency stop buttons or magnetic safety keys. These features are connected to the variable pulley system and can quickly halt the movement of the treadmill belt in case of an emergency or if the user loses balance. The variable pulley system plays a vital role in these safety mechanisms, ensuring immediate response and preventing accidents or injuries.

Smooth and Consistent Belt Movement:

Variable pulleys contribute to the smooth and consistent movement of the treadmill belt. The design and construction of the variable pulley system help maintain a steady and even belt motion, providing users with a stable running or walking surface. This ensures a comfortable and natural stride, reducing the risk of discomfort or strain during the workout.

In summary, variable pulleys are integral to the functionality of treadmills. They enable speed control, facilitate pre-programmed workout programs, enhance user comfort, incorporate safety features, and ensure smooth and consistent belt movement. These features combine to provide users with a versatile, customizable, and enjoyable workout experience on treadmills.

variable pulley

What are the advantages of using variable pulleys in various systems?

Variable pulleys, also known as variable speed pulleys or variable drive pulleys, offer several advantages when incorporated into various mechanical systems. Here are some key advantages of using variable pulleys:

1. Adjustable Speed Ratios:

One of the primary advantages of variable pulleys is their ability to provide adjustable speed ratios. By changing the position of the movable pulley half, the effective diameter of the pulley system can be altered, resulting in different speed ratios between the input and output shafts. This feature allows for precise and continuous speed adjustment without the need for manual gear changes or transmission adjustments. It enables systems to operate at optimal speeds for different conditions and tasks, enhancing efficiency and performance.

2. Smooth and Seamless Transitions:

Variable pulleys facilitate smooth and seamless transitions between different speed ratios. The actuation mechanism associated with the variable pulley allows for controlled movement of the movable pulley half, ensuring gradual adjustments in the effective diameter. This results in smooth speed changes without sudden jolts or disturbances in power transmission, contributing to overall system reliability and user comfort.

3. Energy Efficiency:

By providing adjustable speed control, variable pulleys contribute to energy efficiency in various systems. They allow the system to operate at the optimal speed for a given task, minimizing energy waste and reducing unnecessary power consumption. For example, in automotive applications, variable pulleys in continuously variable transmissions (CVTs) enable the engine to operate at its most efficient speed, resulting in improved fuel economy and reduced emissions.

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, allowing for optimized performance in diverse applications.

5. Cost-Effective Solution:

Variable pulleys can provide a cost-effective solution compared to other speed control mechanisms. Their simplicity in design and operation often results in lower manufacturing, installation, and maintenance costs. Additionally, the ability to adjust speed ratios without requiring complex gear systems or transmission components can reduce overall system complexity and associated costs.

6. Precise Speed Control:

Variable pulleys offer precise speed control in mechanical systems. The fine adjustments in the effective diameter allow for accurate speed setting, enabling systems to meet specific speed requirements with high precision. This is particularly advantageous in applications where precise speed synchronization, timing, or regulation is critical.

7. Reduced Mechanical Stress:

The ability to adjust speed ratios using variable pulleys can help reduce mechanical stress on system components. By optimizing the speed and torque characteristics, variable pulleys can minimize undue strain on belts, bearings, gears, and other transmission elements. This can result in extended component life, reduced maintenance, and improved overall system reliability.

These advantages make variable pulleys a valuable component in various systems, including automotive transmissions, manufacturing machinery, HVAC systems, exercise equipment, and power transmission systems. Their ability to provide adjustable speed ratios, smooth transitions, energy efficiency, and precise control contributes to enhanced performance, flexibility, and cost-effectiveness.

China Good quality Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley   pulley alternatorChina Good quality Competitive Price Heavy Duty Gravity Roller SS304 Light Steel Idler Pulley   pulley alternator
editor by CX


variable pulley

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