Constant Speed, Maximum Productivity

FUJI “KOSOKU” High-Freq Unstoppable Power
  • High Frequency angle grinder and inverter combo system
  • High-Frequency Grinder & Converter Combo for Foundry and Shipyard
  • FUJI HIGH frequency 250hz power generator
  • FUJI High-Frequency Grinder with specialized wheel removing casting imperfections in a foundry environment with sparks
  • FUJI High-Frequency Angle Grinder with specialized grinding wheel performing heavy-duty weld removal on steel plates in Foundry
  • High Frequency angle grinder and inverter combo system
  • High-Frequency Grinder & Converter Combo for Foundry and Shipyard
  • FUJI HIGH frequency 250hz power generator
  • FUJI High-Frequency Grinder with specialized wheel removing casting imperfections in a foundry environment with sparks
  • FUJI High-Frequency Angle Grinder with specialized grinding wheel performing heavy-duty weld removal on steel plates in Foundry

High-Frequency Grinder & Converter Combo for Foundry and Shipyard

No.FUJI 250Hz HF Power Tools Combo

Features

  • Operator Comfort: Vibration-dampening handle reduces fatigue for long operations.
  • Long-Term Reliability: Durable gears and coils resistant to wear and heat.
  • Versatility: Compatible with various 7-inch (180mm) grinding wheels.
  • Stable Performance: JIS-compliant 250Hz core for consistent torque output.
  • Portability: Wheel-mounted FG-505NE Converter design for easy mobility.

Specifications

  • Operating Frequency: 250Hz HF Angle Grinder
  • Power Supply: Compatible with 250Hz Generator
  • Wheel Size: 7 inches (180 mm)

Applications

  • Foundry & Shipyard: Heavy-duty grinding and material removal.
  • Finishing: Deburring and precision surface preparation.
  • High Frequency angle grinder and inverter combo system
  • High-Frequency Grinder & Converter Combo for Foundry and Shipyard
  • FUJI HIGH frequency 250hz power generator
  • FUJI High-Frequency Grinder with specialized wheel removing casting imperfections in a foundry environment with sparks
  • FUJI High-Frequency Angle Grinder with specialized grinding wheel performing heavy-duty weld removal on steel plates in Foundry
  • Description

  • Cautions

  • Electrical Symbol

Product Overview

The FUJI HGC-902 High-Frequency Angle Grinder (paired with the FG-505NE Generator) represents a paradigm shift in industrial metalworking. Unlike standard power tools that struggle under pressure, this system utilizes a robust Squirrel-Cage Induction Motor driven by a 250Hz frequency inverter.

Designed for extreme environments like foundries and shipyards, it delivers a massive 2100W of power output. The intelligent motor design adjusts torque based on load resistance, ensuring the grinder maintains high RPMs even during the heaviest grinding applications—something traditional 1400W tools cannot achieve.

Foundry worker using FUJI High Frequency Grinder

Why Upgrade to FUJI High-Frequency?

❌ Standard Electric Grinder

  • Speed Drop: RPMs plummet when pressure is applied, slowing down work.
  • Weak Power: Typically rated at 1000W-1400W (input), with low torque.
  • High Maintenance: Carbon brushes wear out rapidly and need frequent replacement.
  • Overheating: Armatures burn out during long 8-hour shifts.

✅ FUJI 250Hz HF System

  • No Speed Drop: 250Hz power keeps RPM constant, even under heavy load.
  • Massive Power: Delivers up to 2100W output for aggressive stock removal.
  • Brushless Motor: Squirrel-cage induction design means zero carbon brushes to replace.
  • All-Day Running: Superior heat dissipation allows for continuous 8-hour operation.

Technical Specifications

Model HGC-902 (Requires FG-505NE Generator)
Motor Type Three-Phase Squirrel-Cage Induction Motor
Frequency 250Hz (Japanese JIS Standard)
Max Power Output 2100W (Variable based on load)
Wheel Capacity 7 Inches (180mm)
Weight Lightweight design for reduced operator fatigue
💡 Pro Tip: Optimize Your Abrasives

To fully utilize the high torque of the HGC-902, we recommend pairing it with the FUJI Super F2 7-inch Grinding Wheel. Its advanced bond structure withstands high-speed rotation and aggressive pressure without glazing.

Daily Maintenance & Care

To ensure the longevity of your high-frequency investment, proper daily maintenance is critical.

  • ⚠️ Post-Shift Cleaning: After every shift, use a high-pressure air gun to blow out the machine head vents.
  • Dust Control: Maintain a clean workspace to minimize airborne dust accumulation. Conductive iron dust, if sucked into the motor housing, can bridge stator coils and cause short circuits.
  • Keep it Dry: Store the generator and tools in a dry environment to prevent moisture ingress.
High Frequency angle grinder and inverter combo system

Why Choose FUJI (Kosoku)?

Legacy of "Kosoku" (High Speed): Since 1953, Fuji Grinding Wheel has defined the Japanese standard for industrial metalworking. Our "Kosoku" high-frequency tools are not repurposed consumer gadgets; they are purpose-built for the brutal conditions of shipyards and foundries.

Direct OEM Guarantee: We manufacture in our own factories in Japan and Thailand. By controlling the entire supply chain—from the generator to the motor to the abrasive wheels—we guarantee system compatibility and durability that third-party assemblers cannot match.

250Hz: We stick to the robust 250Hz standard because it offers the perfect balance of speed and motor longevity, reducing the mechanical stress seen in higher frequency competitors.

FUJI JIS-certified factory in Japan

Frequently Asked Questions

Q: Do I really need a special generator for this grinder?

A: Yes. The HGC-902 operates at 250Hz (High Frequency). You cannot plug it into a standard 50Hz/60Hz wall outlet. It requires the FG-505NE High-Frequency Generator to convert the power, ensuring high torque and constant speed.

Q: What is the main advantage over a standard 7-inch grinder?

A: Standard electric grinders lose RPMs when you push down hard. The FUJI High-Frequency system maintains its rated speed even under heavy load, removing metal up to 300% faster. Plus, the motor has no brushes to replace.

Q: How often do I need to replace the carbon brushes?

A: Never. This tool uses a Squirrel-Cage Induction Motor, which is brushless. This significantly reduces maintenance downtime and parts costs compared to universal motors.

Q: Can I use standard grinding wheels?

A: Yes, it accepts standard 180mm (7") wheels with a 22.23mm hole. However, for best performance, we recommend FUJI Super F2 High-Performance Wheels designed to withstand the high torque without glazing.

Q: Is technical support available if the machine stops working?

A: Absolutely. We provide full technical diagrams and spare parts availability. Since the motor is dust-proof and brushless, failures are rare, but our support team is available 24/7 for troubleshooting.

Explore Professional Industrial Solutions

Maximize your productivity by pairing this tool with our premium Grinding Wheels and compatible HF Generators. Discover the engineering behind our brand at Our Factory, or Contact Sales for a custom quote today.

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 RegionSafety Factor (Burst Multiplier)Safety Logic & Benchmark
FUJI (High Precision)> 2.0xEngineered to exceed JIS requirements for maximum reliability.
Japan (JIS R 6242)2.0xExtreme Safety: A wheel rated at 80m/s must withstand a 160m/s burst test.
Europe (EN 12413)$1.73xRisk Balanced: Provides high safety redundancy for most industrial apps.
USA (ANSI B7.1)1.5xEfficiency 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.

🛡️ Electrical Appliance & Safety Compliance

This product strictly complies with the Electrical Appliance and Material Safety Technology Standards (Noise Countermeasures), revised under the Ministry of Economy, Trade and Industry (METI) Ordinance No. 57.

*Official Enforcement Date: April 1, 2013. This ensures maximum electromagnetic compatibility (EMC) and operational stability in industrial environments.

How to Read Operational & Safety Symbols

Fuji Tool Safety Symbols Chart

Key Safety Indicators:

  • Double Insulation: Marked by the "square-in-a-square" symbol, indicating no grounding is required for safe operation.
  • Noise Suppression: Compliance with Ordinance No. 57 prevents interference with other electronic equipment.
  • Mandatory PPE: Visual cues for hearing, eye, and respiratory protection.

Professional Note: For global industrial procurement, these Japanese METI standards ensure that Fuji tools meet high-level noise reduction requirements, critical for precision workshops across Europe and North America.