China best Manufacturer′ S Direct Selling U-Groove Bearing Pulley U0519-6 PA Rubber Coated Bearing Door and Window Movable Pulley idler pulley

Product Description


Product Description

Product Name: Sliding Roller HN-U571-6
Dimensions: ID=5mm;  OD=19mm;  Height=6mm
Outside Material: Polyformaldehyde (POM), Polyamide(PA6, PA66, Nylon), Polypropylene(PP),  Polycarbonate(PC), Polyurethane(PU)
Insert Material: Carbon Steel, Chrome Steel, Stainless Steel
Color: All colors available

Profile Type:U Groove
Surface Treatment: Lathing 
Structure: HN-625ZZ(ID=5mm, OD=20mm, Width=7mm)bearing injected with POM
Service: OEM&ODM 
Experience: With 15 years manufacturing history 

1) Built-in precise micro bearing;
2) Low noise, elegant performance and rolling smoothly;
3) Superior in quality and moderate in price;
4) We can supply both standard products and customized items according to the customers’ special requirements.
5) We can provide free samples for your reference.

Item No. Door and Window Plastic Bearing Pulley
Dimensions OEM ODM
Material Bearing -Chrome steel, carbon steel, stainless steel
Plastic part- POM/ Nylon6 /Nylon66 +GF/PU/Rubber
Housing part – Plastic(Nylon)/ Steel/ Zinc alloy die casting / Aluminium profile/ alu. Alloy die casting
Color Original/black/white/Red/ Green/ Orange, or per customers’ requirement
Surface Treatment Zinc plated/Nickle Plated/Black treatment/ Painting/Electrophoretic treatment
Features heavy-duty,adjustable,low noise,easy installation,sliding smoothly,long life,standard,customized,etc.
Application Sliding window and door, Sliding accessories, furniture accessories etc.
Packaing Foil bag+Neutral Carton+Pallet, or per customers’ requirement
MOQ 1000 pcs
Lead Time According to the order q’ty
OEM& ODM Technical drawing or sample is needed


Payment & Packaging &Delivery:

Payment Terms:    

1) 100% T/T
2) 30%   T/T in advance, 70% against copy of BL
3) Paypal
Packaging Details: Standard export packing (Plastic bag, cartons and pallets or wooden case); 
                   As customers’ requirement
Delivery Port: HangZhou / ZheJiang
Delivery Time: Normally ready goods and stock within 30 days or as the customer’s request

PS:  1) material and color can according to customers’ requirement.
        2) we can make different size as per customers’ requirement.

Company Profile




Q: Are you the manufacturer?

A: Yes, we are a professional manufacturer focused on door and window roller pulleys for over 15 years.

Q: Do you offer free samples?
A: Yes, we are very glad to offer free samples for you to check the quality.

Q: Can we make our own color box?
A: Yes, if the order quantity reaches 1000 sets, we can make a customized color box for you.

Q: Can we print our logo on the products?
A: Yes, we can print your logo on the products according to your design.

Q: How does your factory do regarding quality control?
A: 80% of the staff has 10 years experience, a mature skilled technical team, and a complete quality management system to ensure high quality.

Q: What is the after-sale service for the sliding rollers?
A: We have online technical support. If it is a quality problem, we will replace the broken ones with new ones.

Q: How long is the production time?
A: For samples in stock, shipped in 2 days. if not in stock, the lead time is in 7 days. For mass production, the lead time is around 15 days after receiving the deposit payment.

Q: How about the shipment?
A: For small orders, we can ship them by DHL, FedEx, UPS, TNT, etc. For mass production orders, we can ship them by sea or by air. /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Contact Angle: /
Aligning: Bearing
Separated: Unseparated
US$ 0/Piece
1 Piece(Min.Order)


Order Sample



Customized Request

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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

bearing pulley

How do advancements in bearing technology influence the design of modern bearing pulleys?

Advancements in bearing technology have a significant impact on the design of modern bearing pulleys. These advancements enable improved performance, reliability, and efficiency in bearing pulley systems. Here are some ways in which advancements in bearing technology influence the design of modern bearing pulleys:

1. Enhanced Load Capacity:

New bearing technologies, such as advanced materials and manufacturing techniques, allow for higher load-carrying capacity in modern bearings. This enables the design of bearing pulleys that can handle heavier loads without compromising performance or safety.

2. Reduced Friction and Energy Consumption:

Advancements in bearing technology have led to the development of low-friction bearings, such as ceramic or hybrid bearings. These bearings minimize friction, resulting in reduced energy consumption and improved efficiency in bearing pulley systems. Lower friction also contributes to smoother operation and increased lifespan of the pulleys and associated components.

3. Increased Durability and Longevity:

New bearing materials, surface treatments, and lubrication technologies have improved the durability and longevity of modern bearings. This, in turn, influences the design of bearing pulleys by allowing for longer maintenance intervals, reduced downtime, and increased overall system reliability. Bearings with extended service life can enhance the performance and cost-effectiveness of bearing pulley systems.

4. Improved Sealing and Contamination Resistance:

Modern bearing technologies offer enhanced sealing mechanisms and contamination resistance features. These advancements protect the bearings and pulleys from dust, moisture, and other contaminants, reducing the risk of premature failure and improving the reliability of the pulley system, especially in challenging or harsh operating environments.

5. Compact and Lightweight Designs:

Advancements in materials and manufacturing processes enable the development of compact and lightweight bearing designs. This translates into more compact and lightweight bearing pulleys, which can be beneficial in applications where space is limited or weight reduction is desired. Compact and lightweight pulleys also contribute to improved system efficiency and reduced inertia.

6. Integration with Sensor Technology:

With the rise of Industry 4.0 and the Internet of Things (IoT), bearing pulleys can now be designed to integrate with sensor technology. Bearings equipped with sensors can provide real-time monitoring of parameters such as temperature, vibration, and load, enabling predictive maintenance and early detection of potential issues. This integration enhances the overall reliability and safety of bearing pulley systems.

Overall, advancements in bearing technology drive innovation in the design of modern bearing pulleys. These advancements enable higher load capacity, reduced friction, increased durability, improved sealing, compact designs, and integration with sensor technology. As a result, modern bearing pulleys offer improved performance, reliability, and efficiency in various industrial applications.

bearing pulley

How does the quality of bearings affect the performance and longevity of pulleys?

The quality of bearings has a significant impact on the performance and longevity of pulleys. High-quality bearings offer several benefits that contribute to improved pulley performance and extended lifespan:

1. Smooth Operation:

High-quality bearings are manufactured to tight tolerances and precise specifications. They provide smoother operation, reducing friction and minimizing energy loss. Smooth operation results in improved efficiency, reduced wear, and lower operating temperatures.

2. Load Capacity:

Quality bearings are designed to withstand higher loads and offer better load-carrying capacity. They can handle radial and axial loads effectively, ensuring that the pulley can support the applied loads without premature failure.

3. Durability:

High-quality bearings are made from durable materials and undergo stringent quality control processes. They are more resistant to wear, fatigue, and corrosion, allowing them to withstand demanding operating conditions. This enhances the durability of the pulley and reduces the frequency of bearing replacements.

4. Precision and Alignment:

Quality bearings are manufactured with precision, ensuring accurate dimensions and proper alignment within the pulley system. Precise alignment helps minimize misalignment-related issues, such as increased friction, premature wear, and noise generation.

5. Reduced Maintenance:

Using high-quality bearings in pulleys reduces the need for frequent maintenance and repairs. These bearings require less lubrication, have longer service intervals, and exhibit improved resistance to contamination. As a result, the overall maintenance costs and downtime associated with the pulley system are reduced.

6. Longevity:

The performance and longevity of pulleys are directly influenced by the quality of the bearings. High-quality bearings have a longer lifespan, providing reliable and consistent performance over an extended period. They help prevent premature bearing failures, reducing the risk of unexpected downtime and costly repairs.

It is important to select bearings from reputable manufacturers and ensure they meet the required industry standards and specifications. Regular inspection, lubrication, and proper maintenance practices further contribute to maximizing the performance and longevity of pulleys.

bearing pulley

What is a bearing pulley, and how does it function in mechanical systems?

A bearing pulley is a type of pulley that incorporates bearings to reduce friction and facilitate smooth rotation. It is commonly used in mechanical systems to transmit motion, change the direction of force, or provide mechanical advantage. Here is a detailed explanation of what a bearing pulley is and how it functions:

1. Definition and Components:

A bearing pulley consists of two main components: the pulley wheel and the bearing. The pulley wheel is a circular disc with a groove or channel that allows a cable or belt to pass through. The bearing, typically a ball bearing or roller bearing, is integrated into the pulley wheel’s hub. It provides support and enables the pulley wheel to rotate smoothly with minimal friction.

2. Friction Reduction:

The primary function of a bearing pulley is to reduce friction between the pulley wheel and the axle or shaft on which it rotates. The bearings within the pulley create a low-friction interface, allowing the pulley wheel to spin freely. This friction reduction is essential for efficient power transmission and smooth operation of mechanical systems.

3. Load Distribution:

Bearing pulleys distribute the load evenly across the bearings, preventing excessive wear and minimizing the risk of component failure. The bearings bear the weight and forces applied to the pulley, ensuring that the load is distributed over a larger surface area. This load distribution capability enhances the longevity and reliability of the pulley system.

4. Directional Change:

Bearing pulleys are used to change the direction of force or motion in mechanical systems. By routing a cable or belt through the pulley wheel’s groove, the pulley can redirect the force applied to it. For example, a belt passing over a bearing pulley can change the direction of rotation or transmit force to a different location, enabling the desired mechanical operation.

5. Mechanical Advantage:

Bearing pulleys can provide mechanical advantage by altering the relationship between force and distance. By increasing or decreasing the diameter of the pulley wheel, the mechanical advantage can be adjusted. A larger diameter pulley provides a greater mechanical advantage, allowing a smaller input force to produce a larger output force. This feature is commonly utilized in various applications, such as lifting systems or tensioning mechanisms.

6. Application Areas:

Bearing pulleys find applications in numerous mechanical systems and devices. They are commonly used in conveyor systems, lifting and hoisting equipment, gym equipment, automotive engines, agricultural machinery, and many other industrial and commercial applications. The smooth rotation and friction reduction offered by bearing pulleys make them indispensable components in these systems.

Overall, a bearing pulley is a mechanical component that incorporates bearings to reduce friction and enable smooth rotation. It plays a crucial role in transmitting motion, changing the direction of force, and providing mechanical advantage in various mechanical systems and devices.

China best Manufacturer′ S Direct Selling U-Groove Bearing Pulley U0519-6 PA Rubber Coated Bearing Door and Window Movable Pulley   idler pulley	China best Manufacturer′ S Direct Selling U-Groove Bearing Pulley U0519-6 PA Rubber Coated Bearing Door and Window Movable Pulley   idler pulley
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