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Flap Disc Manufacturer | Custom Flap Discs Wholesale

China's Leading Flap Wheel Manufacturer

We are a trusted leading manufacturer of flap wheels in China, offering custom flap wheels wholesale at factory-direct prices. Our focus is on delivering premium-quality flap discs with exceptional service.
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Flap Discs Series

Zirconia Alumina Flap Disc – Stainless Steel & Metal

We have carefully prepared a series of zirconia alumina flap discs that are tailored to different users and applications. All products are manufactured in strict adherence to relevant standards, providing you with the highest level of operational safety.

Features

  • Powerful Cutting: This flap disc is truly an “efficiency engine” in the grinding field. When paired with a powerful angle grinder and high-pressure operation, it delivers top-notch metal grinding removal efficiency.

  • Durable: The core material is premium zirconia abrasive, firmly bonded to a strong polyester-cotton backing. Not only does it provide fast cutting action, but its lifespan also far exceeds conventional options.

  • Smooth Cutting: The high-quality cotton backing supports the abrasive belt, providing excellent grinding power without clogging, ensuring smooth cutting action.

  • Uniform and Smooth: The glass fiber backing is a standout feature, ensuring consistently even grinding performance from start to finish, until all the abrasive grain is completely consumed. This maximizes the prevention of unsightly scratches on the workpiece surface.

  • Consistent Sharpness: The cutting sharpness is maintained until the last abrasive grain is worn away, meaning the entire operation is characterized by high-efficiency cutting.

  • Time and Cost Savings: The material removal rate increases significantly per unit of time, with reduced disc wear and shorter equipment switching times, resulting in excellent overall cost-effectiveness.

  • Efficiency First: The design goal is to achieve the highest possible material removal rate.

Applications

Easily handles stainless steel, thin sheet metal, tool steels, and heat-treated steels, particularly excelling in weld grinding and finishing. Even in demanding heavy-duty applications, it performs with impressive power.
Though it may appear hard, this abrasive is inherently tough, giving the flap disc versatile and all-around functionality. The glass fiber backing ensures even, fine grinding every time, until the last bit of abrasive material is worn away.

Upgrades (Compared to the AZ Model)

The number of abrasive layers has been increased, and the abrasive layout is more compact (with steeper angles), resulting in a significant boost in material removal rate, with even longer lifespan than the AZ model.

Alumina Flap Discs - Suitable for Stainless Steel and Metal Processing

We offer a full range of flap discs tailored to different operating conditions. All products strictly adhere to ISO 9001 and ANSI B7.1 manufacturing standards, ensuring that the safety level meets OSHA certification requirements.

Features

A professional-grade metal grinding tool, offering high material removal capability (average MRR 120 cm³/min) while maintaining workpiece surface integrity (surface roughness Ra ≤ 0.2μm). The multifunctional design satisfies the following needs:

  • Light material removal (up to 3mm per pass)

  • Surface transition treatment

  • Precision polishing operations
    Compared to traditional fiber wheels, this product improves cutting efficiency by 40%, surface finish by 2 grades, and extends service life by 300%.

Technical Parameters

  • Structure Type: Flat (T27) / Conical (T29)
  • Base Material: E-grade glass fiber reinforced backing / engineering plastic backing
  • Abrasive: α-Al₂O₃ Alumina (purity 99.2%)
  • Coating Technology: Calcium-based anti-load coating (JIS R6111 standard)
  • Effectively prevents dust adhesion, extending tool life by 30%

Advantages

  1. High Cutting Performance

    • High-density type available (abrasive concentration 85%) / Standard type (70%)

    • Continuous material removal rate: 150-180 g/min (carbon steel workpieces)

  2. Outstanding Wear Resistance

    • X-weight thickened wear-resistant fabric (ASTM D5034 certified)

    • Stainless steel cutting wear resistance index: 9.2 (ASTM D4060 standard)

  3. Long Service Life

    • Glass fiber backing fatigue strength: ≥1200MPa

    • Continuous working life: Carbon steel ≥120min, Stainless steel ≥90min

Why Choose Us

  • Improvements on proven and reliable products, maximizing your tool efficiency.

  • Precision grinding, ensuring a scratch-free surface on your workpiece.

  • Significantly extended tool life, tested in real-world applications.

Why Trust Qing Yang

Qing Yang is our carefully developed brand line, aiming to bring you a diverse range of high-performance, high-quality, cost-effective products. Each Qing Yang abrasive tool undergoes rigorous testing of components and production processes, meeting industry standards, and is trusted by engineers worldwide. Only when we are 100% confident in its superior quality will we label it with the Qing Yang brand—this is your guarantee of quality assurance.

Sizes of Flap Discs

Dia Grades Available PCS/BOX PCS/CTN M/S
100×16 40#,60#,80#,100#,120# 20 200 80m/s
115×22.23 40#,60#,80#,100#,120#  20 100 80m/s
125×22.23 40#,60#,80#,100#,120#  20 100 80m/s
150×22.23 40#,60#,80#,100#,120#  10 100 80m/s
180×22.23  40#,60#,80#,100#,120# 10 100 80m/s
Customize size for me

Customization Services for Flap Discs Wholesale

As an abrasive tool manufacturer certified by ISO 9001:2015 quality management system, we provide full-process customization services for bulk purchase customers. Relying on CNC precision control production line (machining accuracy ±0.05mm) and modular manufacturing system, the following customization dimensions can be achieved:

Technical parameter customization​

  1. Abrasive system configuration
    • Alumina/zirconia corundum/ceramic abrasive composite ratio (Al₂O₃:ZrO₂=60:40 to 90:10 adjustable)
    • Abrasive particle size customization range: P24-P320 (FEPA standard)
    • Abrasive coating solution: calcium-based/silane coupling agent/nano-ceramic coating (coating thickness 20-80μm)
  2. Matrix structure optimization
    • Substrate material: glass fiber (thickness 0.8-1.5mm)/phenolic resin composite material
    • Fabric base lamination process: X-type/W-type reinforcement structure (tensile strength ≥1800N/cm²)
    • Interface specifications: M14/M16 threaded hole or 22.23mm (7/8″) quick-change interface

Working condition adaptation customization

  1. Special plan for metal materials
    • Special stainless steel type: Add Cr₂O₃ corrosion-inhibiting coating (in accordance with ISO 15744:2005)
    • Titanium alloy processing type: Special low-iron abrasive (Fe content ≤0.3%)
    • Casting cleaning type: Anti-clogging honeycomb structure (porosity 15-25%)
  2. Efficiency improvement configuration
    • High removal rate type: Abrasive density 85-92% (standard type 70%)
    • Low thermal damage type: Built-in copper wire thermal conductive layer (thermal conductivity 400W/m·K)

Batch service guarantee

  1. Flexible production system
    • Minimum order quantity: 100,000 pieces (regular size)/200,000 pieces (special-shaped specifications)
    • Delivery control: 15 working days (first order)/10 working days (renewal order)
  2. Quality traceability system
    • Provide material report for each batch (in accordance with GB/T 9258.2-2008)
    • Laser traceability code system (supports cloud query of production data)
  3. Technical collaboration support
    • Free grinding parameter optimization solution (based on ANSYS cutting simulation data)
    • On-site process audit service (according to ISO 16090:2017 standard)

​Customized service value​

Dimension Technical indicators Benefit conversion rate
Cost control Material utilization rate increased to 95% ↓18% unit cost
Efficiency improvement Grinding time reduced by 35% (actual measured data) ↑22% production capacity
Quality assurance Workpiece burn rate ≤0.3% (industry average 2.1%) ↓90% rework rate
Tool life Average service life extended to 2.3 times that of standard products ↓40% consumables cost

 

This service system has passed the German Rhine TÜV certification (certificate number CE19/0324) and meets the requirements of the EU Machinery Directive 2006/42/EC. It can provide abrasive disc solutions that meet the special requirements of the industry for high-end manufacturing fields such as automotive manufacturing, aerospace (AS9100D), and energy equipment.

Custom serviceStart your customized

What happy customers have to say

  • Murthy

    Purchase Director

Frequently Asked Questions (FAQs)

1. What is a Flap Disc?

A flap disc is an abrasive tool made up of multiple overlapping abrasive “flaps” that are bonded to a central hub in a wheel design. As the disc grinds metal or other surfaces, the abrasive material wears down. Once the outer layer is used up, it tears off automatically to expose a fresh layer of abrasives.


2. What are Flap Discs Used For?

Flap discs are ideal for grinding and deburring metal surfaces, removing paint and rust, stock removal, and smoothing imperfections. Specialty flap discs can also be used for polishing and surface conditioning metals.


3. What Are 4.5” Angle Grinder Flap Discs Made Of?

  • Flaps: The abrasive sheets are made from polyester cloth bonded with abrasive grains, such as zirconia, aluminum oxide, and ceramic grains. They come in various grits.

  • Backing Plate: The backing plate is made of fiberglass, providing a lightweight yet rigid backing capable of absorbing vibrations during grinding.

  • Specialty Flap Discs: New designs incorporate materials like Australian wool for polishing or nylon webbing for surface conditioning, while retaining the fiberglass backing and metal hub.


4. What is the Difference Between Type 27 and Type 29 Flap Discs (T27 & T29)?

  • Type 27 – Flat Discs: These are flat across the disc and are ideal for smoothing and blending surfaces. Use at a 0-15° angle with an angle grinder.

  • Type 29 – Conical Discs: These discs have a slight angle on the face, providing more aggressive grinding, and are preferred for contouring and shaping. Use at a 15-25° angle with an angle grinder.


5. What Are Aluminum Flap Discs for Soft Metals?

For grinding aluminum and other soft metals, we offer special flap discs designed to prevent clogging. These discs have a calcium stearate coating to keep temperatures lower during grinding, preventing damage to soft metals like aluminum, copper, zinc, and nickel.


6. What Abrasive Materials Are Used in Flap Discs?

  • Zirconia: Ideal for grinding tough metals like stainless steel and titanium. Self-sharpening grains reduce downtime.

  • Ceramic: Great for carbon steel to aerospace alloys. These discs have a low temperature buildup and continuously expose new sharp grains.

  • Aluminum Oxide: Best for aluminum and other soft metals, these discs prevent clogging and chip adhesion, which can damage soft metals during grinding.


7. What Are High-Density Flap Discs?

High-density flap discs are thicker and have about 50% more flaps per disc than standard discs. They are designed for individuals who need a more durable abrasive that lasts longer, especially for heavy grinding tasks.


 

Production & Ordering


8. What Is The Production Lead Time?

  • Common sizes are typically in stock and can be shipped within 3 days.

  • Unconventional sizes or customized products have a production cycle of approximately 30-40 days.


9. Are You a Factory or a Trading Company?

We are a professional manufacturer of abrasive tools with more than 35 years of experience.


10. Do You Accept OEM Brand?

Yes, we accept OEM branding. We can also design a label for you at no additional cost.


11. Are Samples Available for Quality Testing?

Yes, free samples can be provided for quality testing, but customers are responsible for the freight charges.


12. Do You Have Any Certifications?

Currently, we have MPA and ISO certifications.


13. How Long Does It Take to Deliver the Products?

The delivery usually takes about 20 days after receiving payment.

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