Introduction
This guide provides a detailed overview of the core components, working mechanism, and standard marking system of grinding wheels, with a specific focus on products manufactured by FUJI Grinding Wheel Japan. It is designed to help professionals select, use, and verify grinding wheels correctly to ensure both safety and efficiency in their operations.
A standard grinding wheel is built from three fundamental elements. FUJI Grinding Wheel Japan enhances this classic design by integrating a fourth critical component for superior safety and durability:
Abrasive grains, the cutting edges of the wheel, naturally wear down and become dull over time. As this happens, the bonding agent allows these worn grains to chip away or fall off, automatically exposing fresh, sharp grains beneath. This continuous self-renewing process is known as the Self-Sharpening Action. It is the fundamental principle that allows a grinding wheel to maintain consistent and efficient cutting performance throughout its lifespan.
Grinding wheels are highly specialized tools with countless variations to match different machines, applications, and materials. FUJI Grinding Wheel Japan uses a standardized marking system to convey all critical specifications at a glance.
Example Marking: 125x2.5x22 A30S BF2, Max. Speed 80m/s
This label indicates the wheel's Size, Abrasive Material, Grain Size, Hardness, Bonding Agent, Fiber Mesh, and Maximum Operating Speed.
FUJI marks wheel sizes in the strict order: Outer Diameter (mm) × Thickness (mm) × Hole Diameter (mm).
This section of the marking defines the wheel's cutting composition and characteristics.
① Abrasive Material: Indicates the primary abrasive(s) used. Selecting the correct abrasive for your workpiece material is crucial for performance.
| Abrasive Material Code | Suitable Workpieces |
|---|---|
| A, A/WA, AC, AZ, MA, Z | General Steel, General Cast Iron |
| WA, AZ, MA, Z, GZ, SZ | Stainless Steel, Alloy Steel |
| C, AC, Z | Special Cast Iron (Ductile Iron, Chilled Iron, etc.) |
| GC, C | Non-Ferrous Metals (Aluminum, Brass, etc.), Non-Metals (Stone, Glass, etc.) |
* Swipe right to view full table on mobile
② Grain Size: Refers to the size of the individual abrasive particles.
③ Hardness (Bond Strength): Indicates how strongly the bond holds the abrasive grains. Represented by a letter; closer to 'A' is softer, closer to 'Z' is harder.
④ Bonding Fiber Mesh (BF): Designates the type of bond and reinforcement.
FUJI grinding wheels are produced in two locations, clearly marked on the label:
The first four digits of the lot number indicate the manufacture date:
Recommendation: For optimal safety, it is advised to use resin-bonded wheels within 3 years of its manufacture date.
All grinding wheels will break if operated beyond their rated speed. Exceeding the Maximum Operating Peripheral Speed is extremely dangerous and risks catastrophic wheel failure.
To ensure your machine's RPM setting is safe for a specific wheel, use the following formula:
Formula to Calculate Peripheral Speed (m/s):
Peripheral Speed (m/s) = [Wheel Outer Diameter (mm) × π (3.14) × Machine Speed (RPM)] ÷ 60,000
For convenience, use this pre-calculated table to find the maximum safe RPM for a wheel based on its diameter and maximum m/s rating.
*Formula: Machine Speed (RPM) = [ (Peripheral Speed (m/s) × 60) ÷ (Wheel Outer Diameter (mm) × π) ] × 1000
| Outer Diameter (mm) | Max RPM @ 60 m/s | Max RPM @ 72 m/s | Max RPM @ 80 m/s |
|---|---|---|---|
| 50 | 22,918 | 27,501 | 30,557 |
| 58 | 19,757 | 23,708 | 26,342 |
| 100 | 13,750 | 16,694 | 18,549 |
| 105 | 10,913 | 13,096 | 14,551 |
| 125 | 9,167 | 11,000 | 12,223 |
* Swipe right to view full RPM table on mobile
Example Safety Check:
Selecting the correct grinding wheel is fundamental to achieving optimal results and maintaining a safe working environment. By understanding the four core components—abrasive grains, bond, pores, and FUJI's exclusive reinforcing material—you can appreciate the engineering behind their performance and safety.
The self-sharpening action ensures consistent cutting efficiency, while the detailed marking system provides all the information needed to make an informed choice. Always remember to match the abrasive type, grain size, and hardness to your specific workpiece and application. Most importantly, never compromise on safety: strictly adhere to the size limitations of your machine and never exceed the maximum operating speed marked on the wheel.
By following this guide and consulting FUJI's technical resources, you can ensure that your grinding operations are both highly efficient and safe. If you still have questions about FUJI grinding wheels, abrasive tools, or technical specifications? Let our experts guide you! FUJI GRINDING WHEEL, Over 70 Years of Japanese Standard Quality Heritage, Your Reliable Japanese Manufacturer and Partner of Abrasives Products.
