250Hz-300HZ High Frequency Angle Grinder |7-Inch Industrial Grinder
No. HGC-802/902
Key Features
Frequency Options: Standard 250Hz, customizable to 300Hz.
High-Speed Performance: 5000-7000 rpm load speed delivers fast work progress for high-intensity tasks.
Consistent Efficiency: Maintains high power without speed dropping under load.
Low Maintenance: Features a Fully Encapsulated Motor to ensure low wear and minimal downtime.
Quick Specifications
Note: When exported to other countries and regions, we will make corresponding changes according to the local power grid electricity standards for our equipment and tool, please contact us to confirm the details in advance.
The FUJI KOSOKU HGC-802/902 High-Frequency Angle Grinder is an industrial-grade powerhouse engineered specifically for the most demanding environments, such as foundries, shipyards, and heavy metalworking plants. Unlike standard electric tools, these grinders operate on a 250Hz High-Frequency System (customizable to 300Hz), delivering a constant loaded speed of 5000–7000 RPM.
Designed for 180mm (7-inch) wheels, the HGC series features a fully encapsulated motor that resists dust and metal debris, ensuring exceptional longevity and minimal maintenance even in the harshest conditions.
Why Choose the HGC Series?
🛡️ Fully Encapsulated Motor The motor windings are completely sealed against conductive dust and metal particles. This design drastically reduces wear and short circuits, extending tool life in dirty foundry environments.
⚡ Consistent High Efficiency Unlike universal motors that slow down under load, our high-frequency induction motor maintains high torque and speed even when pressed hard against the workpiece, boosting productivity by up to 30%.
⚙️ Robust Construction Built with high-quality angular gears and a durable aluminum housing. The tool is designed for easy maintenance, ensuring superior running performance and smooth operation over years of service.
🌍 Global Compatibility (300Hz Option) Standard models run at 250Hz. However, for markets in Europe and the Americas, we offer a specialized 300Hz upgrade to match local power standards and performance preferences.
Model Selection: HGC-802 vs. HGC-902
Choose the right model based on your specific grinding application. The HGC-802 is optimized for High Torque (heavy pressure grinding), while the HGC-902 is designed for High Speed (cutting and finishing).
Technical Specifications
Note: These tools require a High-Frequency Inverter (Power Supply) to operate. They cannot be plugged into standard wall outlets.
Ideal Industrial Applications
The HGC-802/902 series is the preferred choice for heavy-duty sectors:
Foundry: Rapid removal of gates, risers, and heavy burrs from cast iron and steel parts.
Shipbuilding: Heavy grinding of hull plates and structural components where reliability is paramount.
Metal Fabrication: Smoothing large weld seams and beveling thick steel plates.
Infrastructure: Maintenance of bridges and heavy steel structures.
Why Choose FUJI High Frequency?
As one of the few global manufacturers still dedicated to producing high-frequency angle grinders compatible with 180mm discs, FUJI KOSOKU fills a critical gap in the market.
While other brands like FEIN or BOSCH reduce their high-frequency offerings, FUJI continues to innovate. The HGC-802/902 stands as a future-proof, robust solution for industrial users who refuse to compromise on power.
Frequently Asked Questions (FAQ)
Q: What power supply do I need for these grinders?
A: You need a High-Frequency Inverter that outputs 200V at 250Hz (or 300Hz depending on your model). Standard 50/60Hz power will not work and may damage the tool.
Q: Can I use standard 180mm grinding wheels?
A: Yes, these grinders use standard 180mm (7-inch) wheels with a 22mm or 22.23mm arbor. However, ensure the wheel is rated for the tool's RPM (at least 7,600 RPM for safety).
Ready to boost your productivity?Contact FUJI Grinding Wheel today for pricing, customization options, and distributor information.
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.
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
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.
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
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.
Related Product
FUJI Kosoku High Frequency Grinder/Inveter: Constant Speed, High Torque,5x Grinding Efficiency, Boost Overall Productivity