High-Efficiency,Long-Lasting

FUJI Self-Sharpening Grinding Wheels
  • FUJI 7-inch Zirconia grinding wheel for castings
  • 7-inch Zirconia grinding wheel for castings
  • Industrial foundry worker using FUJI grinding disc to clean gray iron casting surfaces
  • FUJI 180mm cast iron grinding disc removing burrs from gray iron casting with 7-inch angle grinder
  • FUJI 7-inch Zirconia grinding wheel for castings
  • 7-inch Zirconia grinding wheel for castings
  • Industrial foundry worker using FUJI grinding disc to clean gray iron casting surfaces
  • FUJI 180mm cast iron grinding disc removing burrs from gray iron casting with 7-inch angle grinder

FUJI 180*6mm Zirconia Grinding Wheel for Heavy-Duty Castings

No.HAZ 20S

Engineered for Heavy-Duty Foundry Grinding

This FUJI 180mm zirconia grinding wheel is specially adapted for demanding casting cleanup, rough grinding and heavy stock removal in foundries.

  • 3× tested grinding efficiency: Achieved three times the grinding efficiency of conventional aluminum oxide wheels in our internal tests. Results vary with operating conditions.
  • Purpose-built for castings: For grinding excess material and surface irregularities on cast components.
  • Higher system productivity: Pair with a compatible 300Hz high-frequency angle grinder to improve grinding efficiency and increase production throughput.
  • 180 × 6 × 22.23 mm: Diameter × thickness × bore. Verify mounting compatibility and the wheel’s marked maximum operating speed before use.
  • FUJI 7-inch Zirconia grinding wheel for castings
  • 7-inch Zirconia grinding wheel for castings
  • Industrial foundry worker using FUJI grinding disc to clean gray iron casting surfaces
  • FUJI 180mm cast iron grinding disc removing burrs from gray iron casting with 7-inch angle grinder
  • Description

  • Instruction for Use

  • Cautions

Overview: Zirconia Grinding for Heavy-Duty Castings

Developed following visits to European foundries, this FUJI 180mm zirconia grinding wheel is specially adapted for casting cleanup, rough grinding and heavy stock removal. This T27 depressed-centre wheel is manufactured for the European market.

Zirconia is the primary abrasive, combined with carefully prepared grains, Sumitomo phenolic resin and a controlled warm-pressing process. The result is a purpose-developed grinding wheel for demanding foundry work, with the option of pairing it with a compatible 300Hz high-frequency angle grinder.

FUJI grinding equipment used in a foundry application

Product Advantages & Factory-Tested Performance

1. Three Times the Grinding Efficiency in FUJI Factory Tests

FUJI tested this zirconia wheel against a conventional Super F2 aluminum oxide grinding wheel measuring 180 × 6 mm. Both wheels were tested on the same casting using the same HD-180 angle grinder. Under these conditions, the zirconia wheel achieved three times the grinding efficiency.

This is a grinding-efficiency result, not a claim of three times the wheel life. Actual performance depends on the casting material, workpiece geometry, equipment and operating conditions.

2. Abrasive Preparation & Warm-Pressing Technology

Acid treatment prepares the zirconia grain surfaces for bonding. The abrasive is combined with Sumitomo phenolic resin and formed using FUJI's Japanese warm-pressing process at 60°C, supporting integration between the abrasive and binder.

3. A Compatible High-Frequency System for Higher Productivity

For demanding foundry production, pair this wheel with a compatible FUJI KOSOKU 300Hz high-frequency angle grinder to improve grinding productivity and support higher production throughput.

About the comparison: The three-times-efficiency result was obtained using the HD-180 grinder for both wheels. It was not a comparison between a conventional grinder and a 300Hz high-frequency system.

Product Specifications

Technical Parameter FUJI Specification
Dimensions 180 × 6 × 22.23 mm
Diameter × thickness × bore
Wheel Type T27 depressed-centre grinding wheel
Primary Abrasive Zirconia (ZA)
Abrasive Preparation Acid-treated grains
Bonding System Sumitomo phenolic resin
Maximum Peripheral Speed 80 m/s
Follow the maximum RPM marked on the wheel.
System Option FUJI KOSOKU 300Hz high-frequency angle grinder, subject to compatibility confirmation
Availability Made to order; not held in stock
Quotation & Delivery Confirm specification, quantity and production lead time. Shipping is charged separately.
FUJI 180mm zirconia grinding wheel for heavy-duty foundry castings

Important Use & Selection Notes

Grinding only — do not use as a cutting-off disc. This T27 wheel must not be used to cut through castings, gates or risers. Use a suitable cutting-off wheel or a combination wheel explicitly approved by its manufacturer for both grinding and cutting.

  • Confirm grinder speed, wheel dimensions, mounting flanges and guard compatibility before use.
  • Never exceed the wheel's marked maximum operating speed. Follow the wheel and grinder manufacturers' mounting and operating instructions.
  • Inspect the wheel before mounting. Do not use damaged wheels or strike the workpiece with the wheel.
  • Secure the casting and use the protective equipment and dust controls required for the operation.

Foundry Applications & Field Experience

Visits to European foundries helped shape this product's focus on demanding casting-cleanup operations. FUJI combines these application requirements with factory testing to develop the wheel and discuss suitable grinding equipment.

  • Rough grinding and cleanup of suitable cast iron and cast steel components.
  • Removal of casting surface irregularities and parting-line flash.
  • Grinding remaining gate and riser material after separation, rather than cutting it off.
  • Heavy stock removal and preparation for subsequent manufacturing operations.
FUJI grinding equipment used for industrial foundry work

Frequently Asked Questions from the Shop Floor

Q: Why choose zirconia over conventional aluminum oxide for heavy-duty casting grinding?

A: This wheel was adapted specifically for demanding foundry grinding. In FUJI factory tests, it achieved three times the grinding efficiency of a Super F2 aluminum oxide wheel of the same 180 × 6 mm size. Both wheels were tested on the same casting with the same HD-180 angle grinder. The result describes grinding efficiency under those conditions, not a three-times increase in wheel life.

Q: How does the acid-washing treatment actually help?

A: Acid treatment cleans and prepares the abrasive grain surfaces for bonding. FUJI combines the treated grains with Sumitomo phenolic resin and a controlled warm-pressing process at 40–80°C to support integration between the abrasive and binder.

Q: Why is the alkali-free fiberglass mesh so important?

A: The mesh reinforces the resin-bonded wheel structure. Reinforcement does not make a wheel impact-proof or suitable for unintended operations. This T27 product must be used for grinding within its marked operating limits, never as a cutting-off disc.

Q: How should I store these grinding wheels in our factory?

A: Store the wheels in their original packaging in a dry area, protected from moisture, physical damage and temperature extremes. Follow FUJI's storage instructions and any marked use-by date, and inspect each wheel before mounting.

Q: Can I run this on a standard 50Hz commercial angle grinder?

A: A standard angle grinder may be suitable if its rated speed, wheel capacity, mounting flanges and guard match the wheel requirements. Supply frequency and bore diameter alone do not establish compatibility. For demanding production work, consider a compatible FUJI KOSOKU 300Hz high-frequency angle grinder. FUJI can help confirm the complete grinding setup.

About FUJI Grinding Wheel

Since 1953, FUJI has specialised in grinding wheels, cutting discs and industrial grinding equipment. Our KOSOKU brand developed Japan's first electric angle grinder in 1955, combining over 70 years of manufacturing experience with expertise in both abrasives and power tools.

FUJI's own-factory production and quality-management capabilities support consistent manufacturing, while application-based development adapts wheel specifications to customer requirements. Our focus is practical grinding performance, dependable quality and correctly matched equipment.

FUJI Grinding Wheel manufacturing facilities, products and quality credentials

Discuss Your Foundry Grinding Requirements

Share your casting material, grinding task, current grinder model and speed, required wheel dimensions, quantity and delivery country.

FUJI will help confirm the specification, recommend a compatible grinding setup and provide a quotation and production lead time.

Abrasive Wheel Selection & Technical Parameters Guide

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.

Understanding Fuji Markings (e.g., WA 36 P BF)

  • Abrasive Type (WA/A/AZ): Determines the suitability for material hardness (e.g., WA for hardened steel, AZ for heavy-duty alloys).
  • Grit Size (16 - 120): Indicates the coarseness. Lower numbers for rapid removal; higher numbers for precision finishing.
  • Hardness Grade (L - S): Defines the bond strength. Correct selection prevents premature wheel wear or surface glazing.
  • Bonding Agent (BF): High-grade Resinoid bond reinforced for high-speed safety and impact resistance.

💡 Expert Selection Tip

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.

Fuji Abrasive Technical Selection Chart

Fuji Abrasives Wheel Description of Marking

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 Industrial Quality & Safety Protocols

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.

⚠️ Essential Safety Cautions & Operational Integrity

  • 1. RPM Compliance: Never exceed the maximum R.P.M. specified on the wheel. Using the sides of the wheels for grinding is strictly prohibited, as it compromises the structural integrity of the abrasive bond.
  • 2. Mandatory Idling: Allow the tool to idle for one minute before beginning work. If a new wheel has been mounted, an idle run of three minutes is required to ensure dynamic stability.
  • 3. Workpiece Stability: All materials must be securely fastened. Improperly secured workpieces can lead to vibration, wheel binding, and unsafe kickback forces.
  • 4. Arbor Hole Integrity: Do not modify or enlarge the metal center of the arbor hole. A proper fit is critical; a mismatched arbor causes eccentric rotation and dangerous vibration levels.
  • 5. PPE Requirements: Industrial-grade face and eye protection are mandatory at all times. Ensure all protective gear meets local safety compliance standards.
  • 6. Guard Protection: Protection guards are designed to contain fragments in the unlikely event of a wheel failure. Never operate tools or machinery with guards removed.

Applications of Abrasives & Usage Notes

Abrasive Selection Guide

FUJI Abrasive Selection Table

Selection of grains (A, WA, AZ, etc.) based on material hardness and grinding precision.

Warning Symbol Interpretation

FUJI Usage Symbols and Cautions

Standardized safety icons for safe operation and protection guard usage.

Professional Export & Maintenance Insight

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.