Choose 125mm (5-inch) or 180mm (7-inch) grinding wheels from FUJI’s Super F2 series for general steel and cast iron grinding, weld cleanup and industrial maintenance.
Other Sizes: 100mm, 115mm and 150mm options are also available. Custom grit, hardness and formulations can be assessed for your application.
These 125mm (5-inch) and 180mm (7-inch) grinding wheels from FUJI's Super F2 series combine selected white and brown aluminum oxide abrasives with reinforced resin-bond formulations for general steel and cast iron grinding. They offer affordable performance for metal fabrication, weld cleanup and industrial maintenance.
The 125mm × 6mm option balances manageable handling with durability for medium-duty grinding. Choose the 180mm option for larger accessible surfaces and sustained heavy stock removal. This page covers general metal grinding formulations; the 125mm wheel here is distinct from FUJI's dedicated aluminum grinding wheel.
FUJI uses Japanese warm-press manufacturing technology and controlled production processes to support consistent wheel quality. Other diameters, including 100mm, 115mm and 150mm, are also available to match different equipment and production needs.
The Super F2 series uses selected white and brown aluminum oxide, also known as corundum abrasives, in formulations selected for the grinding task. Phenolic resin bonds the abrasive grains, while alkali-free fiberglass reinforcement supports wheel integrity.
Temperature control adds another way to manage the resin-bond system during forming. The response depends on the resin and formulation: controlled warmth can influence binder flow and distribution around the abrasive grains. FUJI combines its warm-press process with selected materials and controlled curing to support consistent bonding and wheel structure.
The aim is balanced grinding performance, not simply maximum density or the hardest bond grade. The formulation must retain useful abrasive grains while allowing worn grains to release at an appropriate rate. FUJI's P-grade formulation is designed to combine this balance with porosity and resilience for heat management, self-sharpening action and a comfortable grinding feel.
| Selection | 125mm / 5 inch | 180mm / 7 inch |
|---|---|---|
| Main role | Medium-duty grinding with a balance of durability and maneuverability | Larger work areas and sustained heavy stock removal |
| Thickness | 6mm | 6mm or 7mm, according to the selected specification |
| Typical tasks | Weld cleanup, deburring, edge preparation and maintenance | Heavy weld grinding, larger steel components and production grinding |
| Equipment | Compatible 125mm angle grinder | Compatible 180mm angle grinder with sufficient power and working clearance |
| Next step | Request the grade, bore and packaging required for your task | View 180mm Super F2 specifications |
The 5-inch wheel suits users who need a step up from compact 100mm grinding without moving to a larger 180mm setup. For suitable tasks, its larger abrasive capacity can support longer use than a comparable 100mm wheel, while the 125mm format remains easier to maneuver than a 180mm setup. Actual wheel life depends on formulation, equipment and grinding conditions.
Typical work includes steel brackets, frames, welded assemblies, component edges and routine repairs. Choose it for medium-duty stock removal where both access and durability matter.
The 7-inch option is suited to larger accessible steel surfaces, substantial welds and repeated production grinding. Select the thickness, grit size, bond grade and speed rating for the material and equipment. A larger wheel must only be used on a grinder designed for that diameter.
Grit size describes the size of the abrasive particles. A lower grit number indicates a coarser abrasive: 24 grit is coarser than 36 grit. Select the grit according to the amount of metal to remove and the required surface finish.
Hardness describes how firmly the bond holds the abrasive grains, not the hardness of the abrasive mineral itself. A harder bond grade retains grains more strongly, while a softer grade releases them more readily. A harder grade is not always better: the wheel needs to balance grain retention with the release of worn grains to maintain effective grinding.
FUJI's standard P-grade warm-pressed formulation is designed to balance grain retention and release with an open, resilient wheel structure. The combination of formulation and Japanese warm-press processing supports heat dissipation, self-sharpening action and a comfortable grinding feel. Porosity and resilience depend on the complete formulation and manufacturing process, not the bond-grade letter alone.
For the 180mm options, 36P combines 36-grit abrasive with a P bond grade, while 24S combines coarser 24-grit abrasive with a harder S bond grade. Choose according to the workpiece, grinder power, contact area and removal requirements rather than assuming the harder bond grade will always perform better.
Standard 72m/s and custom 80m/s versions are available for the 180mm option. Confirm the grade and speed rating for the selected 125mm or 180mm wheel, and follow the maximum RPM marked on its label.
Before ordering, confirm diameter, thickness, bore, grit size, hardness, maximum operating RPM. FUJI can assess formulation adjustments for your material and production requirements.
Compare the wheel size and grade with your actual task across these industrial applications.
Use the 125mm option for medium-duty weld leveling, burr removal and edge preparation on steel assemblies. The 180mm option suits larger accessible welds and heavier removal. Where painting or coating requires a specified finish, follow grinding with the appropriate finishing and surface-preparation process.
Choose 125mm for localized repairs and work around frames and brackets; consider 180mm for larger exposed surfaces and repeated heavy grinding. Equipment access and the amount of metal to remove are more useful selection criteria than diameter alone.
Super F2 can be selected for suitable general cast iron grinding tasks. For demanding casting cleanup and sustained high-removal work, compare the 180mm Super Z zirconia grinding wheel with your current abrasive under the same production conditions.
Choose 125mm for medium-duty grinding where manageable handling and access are important. Choose 180mm for larger accessible surfaces and sustained heavy stock removal, using a grinder approved for that wheel size.
The 125mm format provides more abrasive capacity than a comparable 100mm wheel and is a practical choice for longer medium-duty tasks. The 100mm format remains useful for compact equipment and localized work. Compare wheel consumption and grinding time on the same task to establish the best option.
Start with the workpiece material, amount of stock to remove, grinder power and acceptable surface roughness. Grit size determines abrasive coarseness, while bond grade describes how firmly the bond retains the grains. Stronger retention is not always better: worn grains need to release at an appropriate rate to expose fresh cutting edges. Provide your existing specification and the performance issue you want to improve so FUJI can recommend samples.
No. This page covers general steel and cast iron grinding options. FUJI's 125mm aluminum grinding wheel uses a dedicated formulation for aluminum applications. Select by material and task, not diameter alone.
These are Type 27 depressed center grinding wheels. For cutting operations, select appropriate FUJI cut-off wheels and compatible equipment.
No. Strong grain retention can be useful, but retaining worn grains for too long can reduce cutting action and increase rubbing. The right bond grade balances grain retention and release for the material and equipment. FUJI uses formulation and warm-press process control together to target this balance, rather than relying on bond grade alone.
Match the diameter, thickness, bore and mounting arrangement to the grinder. Never exceed the maximum RPM marked on the wheel. Keep the correct guard fitted, use appropriate protective equipment and follow the wheel and grinder instructions. Inspect wheels before use and follow the supplied storage and service-life guidance.
With more than 70 years of abrasive experience, FUJI develops grinding wheels, cutting discs and industrial grinding solutions. Its own manufacturing operations combine Japanese quality management, controlled materials and application knowledge to support consistent performance for industrial customers.
Whether your workshop uses one size or several specifications, FUJI can help match the abrasive to your equipment, workload and purchasing requirements.
Send your required wheel specifications, quantity for each size and packaging needs. For tailored development, include your material, equipment and the grinding performance you want to improve.
Contact our team for technical support, bulk pricing or distributor enquiries at sales@fujigrindingwheel.com, or view the complete abrasive catalog.
Choosing the correct abrasive wheel is critical for both operational efficiency and JIS-compliant safety. Fuji Grinding Wheels are engineered with precise technical markings to ensure the perfect match for your specific material and machine requirements.
For professional export markets, always verify the Peripheral Speed (m/s) compatibility. Fuji wheels are designed to exceed JIS Burst Speed factors, but operating at the recommended R.P.M. ensures the longest tool life and cleanest cut.
Note: Mismatched grit or hardness can lead to excessive heat buildup, affecting the workpiece's structural integrity.
Global Maintenance Standard: To maintain the high safety factor of Fuji wheels, avoid exposure to excessive humidity and chemical solvents during storage. Proper care preserves the resinoid bond's strength, crucial for high-load industrial applications.
Fuji products are manufactured following strict Japanese standard process requirements. Every wheel is engineered to meet or exceed JIS (Japanese Industrial Standards), such as JIS R 6242 and B 4051. Our core engineering logic prioritizes maximum operator protection by maintaining safety factors and burst speed capabilities that often surpass the highest industry benchmarks.
| Standard Region | Safety Factor (Burst Multiplier) | Safety Logic & Benchmark |
|---|---|---|
| FUJI (High Precision) | > 2.0x | Engineered to exceed JIS requirements for maximum reliability. |
| Japan (JIS R 6242) | 2.0x | Extreme Safety: A wheel rated at 80m/s must withstand a 160m/s burst test. |
| Europe (EN 12413) | 1.73x | Risk Balanced: Provides high safety redundancy for most industrial apps. |
| USA (ANSI B7.1) | 1.5x | Efficiency Focused: Relies on machine guarding and operational procedures. |
Abrasive Selection Guide
Selection of grains (A, WA, AZ, etc.) based on material hardness and grinding precision.
Warning Symbol Interpretation
Standardized safety icons for safe operation and protection guard usage.
When deploying Fuji high-performance tools in overseas markets, ensure that the regional power grid frequency and voltage match the tool specifications. To maintain the superior burst speed safety of Fuji wheels, store abrasives in a dry, temperate environment. Humidity can degrade the resin bond, potentially lowering the wheel’s resistance to centrifugal forces.
