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U-Groove Plastic Bearing Pulley 628ZZ Door & Window Rollers with Sliding Bearings Window Rollers

○ Material and color can according to customers' requirement.
○ We can make different size as per customers' requirement.
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Zhejiang Huaneng Micro Bearing Co., Ltd. +86-15058997617 Zhejiang Huaneng Micro Bearing Co., Ltd. shirley@cnhune.com / +8615058997617
Product Advantages
  • Smooth Operation
    The spacer design ensures smooth rolling and no jamming, even when screws are fully tightened.
  • Silent & High Load Pulley
    Combines quiet bearings with high load capacity for smooth, low-noise performance.
  • Durable Materials
    The nylon-coated outer layer offers strength, toughness, and fatigue resistance.
  • Precision Bearings
    High-quality bearing steel provides quiet, high-speed, and wear-resistant performance.
  • Sealed & Dustproof
    Metal dust cover ensures tight sealing; smooth surface with no burrs for refined quality.
Product Description

U-Groove Plastic Bearing Pulley 628ZZ for Sliding Doors and Windows

The U-Groove Plastic Bearing Pulley 628ZZ is engineered to deliver exceptional performance in sliding door and window systems. Designed with precision, this pulley features chrome steel, carbon steel, or stainless steel bearings for durability and smooth operation. The plastic components (POM, Nylon6, Nylon66+GF, PU, and Rubber) ensure both flexibility and strength, providing a long-lasting solution for various sliding applications.

Key Features:

  • Heavy-Duty & Adjustable: Built to withstand high loads, this pulley is adjustable to fit a wide range of sliding systems, ensuring flexibility in both residential and commercial applications.
  • Low Noise & Smooth Sliding: The high-quality bearing and design ensure quiet operation, reducing friction for seamless sliding and enhanced user comfort.
  • Long Life & Easy Installation: Designed for minimal maintenance with a simple installation process, providing long-term reliability in sliding door and window systems.
  • Customizable Options: Available in a variety of colors such as Original, Black, White, Red, Green, Orange, or per customer’s request, to fit different aesthetic preferences.

Applications:

  • Sliding Windows & Doors
  • Sliding Accessories
  • Furniture Accessories
  • Industrial Sliding Systems

Material and Construction:

  • Bearings: Chrome Steel, Carbon Steel, Stainless Steel
  • Plastic Parts: POM, Nylon6, Nylon66 + GF, PU, Rubber
  • Housing Parts: Plastic (Nylon), Steel, Zinc Alloy Die Casting, Aluminum Profile, Aluminum Alloy Die Casting
  • Surface Treatment: Zinc Plated, Nickel Plated, Black Treatment, Painting, Electrophoretic Treatment for enhanced durability and corrosion resistance.

Why Choose U-Groove Plastic Bearing Pulley 628ZZ?

Whether you're outfitting sliding doors, windows, or furniture systems, the U-Groove Plastic Bearing Pulley 628ZZ provides a cost-effective and reliable solution that combines performance, durability, and ease of use.

Product Parameters
Item No. 628zz
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
Lead Time According to the order q'ty
After-Sales Service Online Support,Free Spare Parts
HS Code 8302410000
Origin Wenzhou Zhejiang
OEM& ODM Technical drawing or sample is needed
Measurement Method
Weight(g) ID(mm) OD(mm) Height(mm)
Payment Terms
1.100% T/T in advance
2.30% T/T deposit, 70% balance against copy of B/L
3. PayPal
Packaging Details: Standard export packing (plastic bag, carton, and pallet or wooden case), or as per customer's requirements.
Delivery Port: Ningbo / Shanghai
Delivery Time: Normally within 30 days for ready goods or as per customer's request.
FAQ
  • What are your payment terms?
    What are your payment terms?

    1.100% T/T in advance2.30% T/T deposit, 70% balance against copy of B/L3. PayPalPackaging Details: Standard export packing (plastic bag, carton, and pallet or wooden case), or as per customer's requirements.Delivery Port: Ningbo / ShanghaiDelivery Time: Normally within 30 days for ready goods or as per customer's request.

  • How do you handle shipment?
    How do you handle shipment?

    For small orders: we ship via express (DHL, FedEx, UPS, TNT, etc.).For bulk orders: we ship by sea or by air, depending on your preference.

  • How long is the production lead time?
    How long is the production lead time?

    For in-stock samples: shipped within 2 days.For out-of-stock samples: lead time is within 7 days.For mass production: approximately 15 days after receiving the deposit.

  • What after-sales service do you offer for sliding rollers?
    What after-sales service do you offer for sliding rollers?

    We provide online technical support.  If the issue is caused by a quality defect, we will replace the defective items with new ones.

  • How does your factory ensure quality control?
    How does your factory ensure quality control?

    80% of our staff have over 10 years of experience.  We have a mature and skilled technical team along with a comprehensive quality management system to ensure consistent product quality.

  • Can we print our logo on the products?
    Can we print our logo on the products?

    Yes, we can print your logo on the products based on your design requirements.

  • Can we customize our own color box?
    Can we customize our own color box?

    Yes, if your order quantity reaches 1,000 sets, we can provide customized color box packaging.

  • Do you offer free samples?
    Do you offer free samples?

    Yes, we are happy to provide free samples for you to evaluate the quality.

  • Are you a manufacturer?
    Are you a manufacturer?

    Yes, we are a professional manufacturer specializing in door and window roller pulleys for over 20 years. We also have our own international sales department and handle both production and sales in-house.

  • How long does it take to receive a response after sending an inquiry?
    How long does it take to receive a response after sending an inquiry?

    We will reply to you within 6 working hours on business days.

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Zhejiang Huaneng Micro Bearing Co., Ltd.
Zhejiang Huaneng Micro Bearing Co., Ltd. specializes in the development and manufacturing of miniature and medium-sized bearings, non-standard bearings, and pulley systems. With over a decade of industry experience, we offer high-precision processing and responsive customization capabilities.As China U-Groove Plastic Bearing Pulley 628ZZ Door & Window Rollers with Sliding Bearings Window Rollers Suppliers and Custom U-Groove Plastic Bearing Pulley 628ZZ Door & Window Rollers with Sliding Bearings Window Rollers Factory. Our products are widely used in home appliances, industrial equipment, and door/window systems, and are exported to Japan, Korea, Europe, and beyond.
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Complete Guide to Adjustable Sliding Window Rollers: Performance, Installation, and Maintenance

In adjustable sliding window roller, the 628ZZ bearing is a key component for smooth and stable sliding. Its precision design allows it to withstand both forward and backward forces, as well as up and down forces, without deforming or wearing out. Furthermore, it's double-sealed to keep out dust and moisture, ensuring long-lasting service even in the challenging factory environment.

For clients like construction companies and hardware manufacturers, using 628ZZ bearings offers numerous advantages. The sliding window system will operate more reliably, be quieter, and reduce maintenance costs over time.

Simply put, its strength, high precision, and impurity resistance make it the preferred choice for high-performance sliding systems.

Adjustable Sliding Window Rollers – a Key Component for Improving the Efficiency of Door and Window Systems

Adjustable sliding window rollers are the core component that allows windows to slide smoothly. They play a crucial role in ensuring a stable, smooth, and silent window. They're essential.

1. Fine-tuning for super-smooth window sliding

  • This roller can be adjusted for height and angle, ensuring the window sash maintains a perfectly balanced position on its track. This flexible adjustment not only significantly reduces friction during sliding but also prevents the window from sticking or moving, making it extremely comfortable to use.

2. Low noise, wear resistance, and long service life

  • Rollers are typically made of sturdy stainless steel or nylon and are equipped with high-precision bearings (such as the commonly used 628ZZ model). This design ensures low noise and resistance to wear, even with long-term use. This reduces the need for frequent repairs, extending the life of the window.

3. Excellent sealing and energy savings

  • Properly adjusting the rollers ensures a tight fit between the window and frame, preventing air and water leaks. Not only can it reduce the waste of heating and cooling air, but the sound insulation effect will also be improved. Whether it is a commercial building such as a shopping mall or an office building, or a house in a high-end community, the needs of energy saving and environmental protection can be met.

How to Correctly Install Adjustable Sliding Window Rollers - a Practical Guide for Corporate Engineering Projects

Proper installation of an adjustable sliding window roller directly impacts the window's performance and longevity. Precise installation ensures smooth sliding, tight closing, and low noise levels, offering numerous benefits.

1. Check and clean the track before installation

  • Before installation, check that the window and roller models match to avoid mis-installation. Clean any dust or dirt from the window track. A clean track minimizes friction when the roller rotates, preventing dust buildup and jamming.

2. Insert the roller and align its position

  • Insert the roller into the slot at the bottom of the window frame, ensuring it is parallel to the bottom edge of the sash. Use a level to check if the installation is crooked, as this will cause the window to slide unbalanced and become inoperable. 3. Adjust the roller height—neither too high nor too low.
  • Use the adjustment screws to slowly adjust the roller position so that the window slides smoothly and securely against the track. If it's adjusted too high or too low, the window will not seal properly and will feel awkward to use.

4. Tighten the screws and test for smooth sliding.

  • After adjustment, use the appropriate tool to tighten the screws on the roller assembly, making sure they are not loose. Then, push the window back and forth a few times to check for smooth sliding, any unusual noises, or any wobble. Installation is complete only if all is well.

5. What are the benefits of a good installation? It's crucial in engineering.

  • Makes the system more stable: It reduces structural stress caused by poor installation, making the window less likely to malfunction.
  • More energy-efficient: With a better seal, heating and cooling are less likely to leak, and it prevents water leaks.
  • Reduces repair costs: The window will last longer overall, ensuring user satisfaction and avoiding frequent repairs.

Adjustable Sliding Window Roller Durability and Maintenance Guidelines – Key to Keeping Your System Running Smoothly

In fact, ongoing maintenance is directly related to the long-term stability of a sliding window system. Although the adjustable sliding window roller may be small, it is crucial for the smooth sliding of the entire window and its energy-saving performance.

1. Regular Inspection: Early Problem Detection and Resolution

It is recommended to perform a routine inspection of the roller every 3 to 6 months, focusing on the following areas:

  • Roller surface: Check for cracks or severe wear;
  • Bearings (such as the commonly used 628ZZ model): Check for smooth rotation and any unusual noises;
  • Adjusting screws: Check for looseness or rust.

Identifying minor problems early can avoid major repairs later, saving significant trouble.

2. Cleaning the Tracks: Reduce Wear and Increase Durability

Sliding track rails are prone to dust and debris accumulation, which increases friction when the rollers slide. Clean the track regularly with a soft brush or dry cloth. Be careful not to use acidic or alkaline cleaners, as they can corrode the metal surface. 3. Lubrication and Maintenance: Reduce Noise and Extend Life

Apply a small amount of silicone grease or neutral motor oil to the bearings and moving parts. Proper lubrication not only reduces noise when the rollers rotate, but also reduces wear, extending their lifespan.

4. Regularly Replace Wear Parts: Ensure Smooth Operation

Rollers are frequently moving parts, and even high-quality ones will naturally wear out over time. If your window is two to three years old, it's recommended to regularly replace the rollers or bearings to ensure smooth sliding.

The adjustable sliding window roller combines precision engineering and practical design to deliver smooth, efficient, and long-lasting performance. With the support of 628ZZ bearings, proper installation, and regular maintenance, these rollers ensure high-quality motion and stability for a variety of window systems — making them a smart choice for builders, contractors, and manufacturers seeking durability and efficiency.

If you're looking for a reliable adjustable sliding window roller manufacturer, Hune is your trusted choice.

We specialize in the research and production of high-performance window and door hardware. Our products utilize meticulous craftsmanship, premium materials, and high-precision bearings like 628ZZ. Whether you're a manufacturer of system windows and doors, a construction contractor, or a hardware vendor, we offer professional solutions that glide smoothly, are durable, quiet, and energy-efficient.

We also have a robust quality control system and comprehensive OEM/ODM services, and have established long-term partnerships with many renowned domestic and international brands. Whether you need a standard roller or custom specifications, we can match you with the right product to elevate the performance and reliability of your window and door systems.