China manufacturer Manufacturer′ S Direct Selling U-Groove Bearing Pulley U0828-9 PA Rubber Coated Bearing Door and Window Movable Pulley with Good quality

Product Description


Product Description

Product Name: Sliding Roller HN-U0828-9
Dimensions: ID=8mm;  OD=28mm;  Height=9mm
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=8mm, OD=28mm, Width=9mm)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 does the choice of bearings impact the precision and performance of pulley systems?

The choice of bearings has a significant impact on the precision and performance of pulley systems. Bearings play a crucial role in supporting and enabling smooth rotational movement in pulley systems. Here are the ways in which the choice of bearings can affect precision and performance:

1. Radial and Axial Load Capacity:

The selection of bearings with appropriate load capacity is essential for maintaining the precision and performance of pulley systems. Bearings should be chosen based on the anticipated radial and axial loads in the system. Using bearings with inadequate load capacity can lead to premature wear, increased friction, and reduced accuracy in transmitting motion.

2. Friction and Efficiency:

High-quality bearings with low friction characteristics contribute to improved efficiency and precision in pulley systems. Bearings with lower friction minimize energy loss, reduce heat generation, and allow for smoother operation. This enables the pulley system to transmit motion more accurately and efficiently, resulting in better overall performance.

3. Rotational Speed:

The choice of bearings should consider the rotational speed requirements of the pulley system. High-speed applications require bearings specifically designed to withstand the associated forces and temperatures. Using bearings that are not suitable for the intended speed can lead to premature wear, overheating, and decreased precision in the pulley system.

4. Vibration and Noise:

Precision and performance can be affected by vibration and noise in pulley systems. Proper bearing selection, such as using bearings with higher radial stiffness, can help minimize vibration and noise levels. Reduced vibration improves the accuracy of motion transmission and enhances the overall performance of the pulley system.

5. Tolerance and Fit:

The choice of bearings should consider the required tolerance and fit in the pulley system. Bearings with tight tolerances and proper fit ensure accurate alignment and smooth operation. Precise fitting reduces play and backlash, resulting in improved precision and performance of the pulley system.

6. Durability and Maintenance:

Bearing selection influences the durability and maintenance requirements of pulley systems. High-quality bearings that are designed for longevity and reliability can reduce the need for frequent maintenance and replacement. This results in improved system uptime, reduced downtime, and enhanced overall performance.

By carefully considering the factors mentioned above and selecting appropriate bearings based on load capacity, friction characteristics, rotational speed, vibration resistance, tolerance, fit, and durability, the precision and performance of pulley systems can be optimized. Consulting with bearing manufacturers or experts can provide valuable guidance in choosing the most suitable bearings for specific pulley system requirements.

bearing pulley

How do bearing pulleys contribute to the smooth movement of conveyor systems?

Bearing pulleys play a crucial role in ensuring the smooth movement of conveyor systems. They provide support, guidance, and efficient power transmission for the conveyor belts. Here’s how bearing pulleys contribute to the smooth operation of conveyor systems:

1. Support and Load Distribution:

Bearing pulleys are designed to support the weight of the conveyor belt and the conveyed materials. They are typically mounted on shafts and positioned at strategic locations along the conveyor system. The pulleys distribute the load evenly across the belt, preventing sagging or excessive tension that could cause disruptions in the movement of the belt.

2. Belt Alignment and Tracking:

Bearing pulleys help maintain proper alignment and tracking of the conveyor belt. The pulleys are usually equipped with self-aligning bearings that allow them to adjust and align with the belt’s direction. This ensures that the belt remains centered on the pulleys, reducing friction and minimizing the risk of belt misalignment or slippage.

3. Power Transmission:

Bearing pulleys transmit rotational power from the drive system to the conveyor belt. They are connected to motor-driven shafts or other power sources and provide the necessary torque to move the belt. The smooth rotation of the pulleys, facilitated by high-quality bearings, enables efficient power transfer and ensures consistent belt speed and movement.

4. Reduced Friction and Wear:

The use of bearings in pulleys reduces friction between the pulley and the belt, as well as between the pulley and the supporting structure. This minimizes energy losses and wear on the components, extending the lifespan of the conveyor system. Low-friction bearings also contribute to smoother operation and reduce the need for frequent maintenance and replacement.

5. Noise and Vibration Reduction:

Bearing pulleys help dampen noise and vibrations generated during the operation of conveyor systems. The smooth rotation and proper alignment of the pulleys, combined with the use of vibration-resistant bearings, contribute to a quieter and more stable conveyor system.

By providing support, guidance, efficient power transmission, and minimizing friction and wear, bearing pulleys contribute significantly to the smooth movement of conveyor systems. These components ensure reliable and uninterrupted material handling, enhancing the overall productivity and efficiency of industrial operations.

bearing pulley

What types of bearings are typically integrated into bearing pulleys?

Various types of bearings can be integrated into bearing pulleys, depending on the specific application and requirements. The choice of bearing type is influenced by factors such as load capacity, rotational speed, operating conditions, and cost considerations. Let’s explore some common types of bearings that are typically integrated into bearing pulleys:

1. Ball Bearings:

Ball bearings are widely used in bearing pulleys due to their versatility, high rotational speeds, and relatively low cost. They consist of steel balls housed within a ring or cage. Ball bearings provide smooth operation and can handle both radial and axial loads. They are suitable for applications with moderate loads and high-speed rotational requirements.

2. Roller Bearings:

Roller bearings, such as cylindrical roller bearings and tapered roller bearings, are commonly integrated into bearing pulleys. These bearings utilize cylindrical or tapered rolling elements to support the load. Roller bearings offer high load capacity and are suitable for applications with heavier loads and lower rotational speeds. They provide enhanced stability and can accommodate axial and radial loads.

3. Needle Bearings:

Needle bearings are used in bearing pulleys that require high load-carrying capacity in a compact design. They feature long, thin cylindrical rollers that have a larger surface area for load distribution. Needle bearings are commonly found in pulleys used in automotive applications, industrial machinery, and heavy equipment.

4. Thrust Bearings:

Thrust bearings are integrated into bearing pulleys when there is a need to withstand axial loads, such as in applications where pulleys experience significant thrust forces. These bearings are designed to handle force in one direction and are commonly used in pulleys for conveyor systems, lifting equipment, and automotive applications.

5. Self-Aligning Bearings:

Self-aligning bearings are suitable for bearing pulleys that operate under misalignment conditions. They can accommodate small misalignments between the pulley wheel and the axle or shaft. Self-aligning bearings are commonly used in pulleys subjected to vibration, thermal expansion, or other factors that cause misalignment.

6. Ceramic Bearings:

In certain specialized applications, bearing pulleys may incorporate ceramic bearings. Ceramic bearings offer advantages such as higher temperature resistance, corrosion resistance, and lower weight compared to traditional steel bearings. They are commonly used in high-speed or high-temperature applications where performance and durability are critical.

These are just a few examples of the types of bearings that are typically integrated into bearing pulleys. The specific choice of bearing type depends on the unique requirements and operating conditions of the pulley system.

What materials are commonly used in the construction of bearing pulleys?

Bearing pulleys are constructed using a variety of materials, each chosen based on factors such as strength, durability, corrosion resistance, and cost. Let’s explore some common materials that are commonly used in the construction of bearing pulleys:

1. Steel:

Steel is one of the most widely used materials in bearing pulley construction. It offers excellent strength, durability, and resistance to wear and tear. Steel pulleys are capable of withstanding heavy loads and high rotational speeds. Common types of steel used include carbon steel, stainless steel, and alloy steel.

2. Cast Iron:

Cast iron is another commonly utilized material for bearing pulleys. It provides good strength and is relatively inexpensive compared to other materials. Cast iron pulleys are often used in applications where weight and cost are important considerations. They are suitable for moderate load capacities and lower rotational speeds.

3. Aluminum:

Aluminum is a lightweight material commonly used in pulleys that require reduced weight or have lower load requirements. Aluminum pulleys offer excellent corrosion resistance and are often used in applications where weight reduction is critical, such as in aerospace or automotive industries.

4. Nylon:

Nylon is a thermoplastic material that is frequently used in pulleys, especially in applications requiring low friction and noise reduction. Nylon pulleys offer good wear resistance, self-lubricating properties, and operate quietly. They are commonly used in fitness equipment, sliding doors, and other consumer products.

5. Delrin (Acetal Resin):

Delrin, also known as acetal resin, is a high-performance thermoplastic material commonly used in bearing pulleys. It provides excellent mechanical properties, low friction, and high wear resistance. Delrin pulleys are often used in precision machinery, conveyor systems, and industrial applications.

6. Brass:

Brass is utilized in certain specialized applications where corrosion resistance and aesthetic appeal are important. Brass pulleys offer good strength, corrosion resistance, and are often used in decorative or marine applications.

These are some of the commonly used materials in the construction of bearing pulleys. The material selection depends on factors such as load capacity, rotational speed, environmental conditions, cost considerations, and specific requirements of the application.

China manufacturer Manufacturer′ S Direct Selling U-Groove Bearing Pulley U0828-9 PA Rubber Coated Bearing Door and Window Movable Pulley   with Good quality China manufacturer Manufacturer′ S Direct Selling U-Groove Bearing Pulley U0828-9 PA Rubber Coated Bearing Door and Window Movable Pulley   with Good quality
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