4" Fuji Portable Angle Grinder (HDC-100), Japanese Power Tools
No.HDC-100
Key Features
960W High Power: Maximum output ensures high grinding performance for metalworking.
Safety Assurance: Double insulation structure eliminates electric shock risks.
Auto-Stop Brushes: Carbon brushes automatically stop to prevent motor damage.
Tangle-Free Design: Movable power cord prevents twisting and entangling during use.
EMC Compliant: Noise prevention function complies with international standards.
Specifications
Global Export 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 in advance to confirm the details.
The FUJI HDC-100 is a premier 4-inch (100mm) electric angle grinder, proudly Made in Japan. Unlike standard grinders that chase high wattage at the expense of longevity, the HDC-100 is engineered for balance, durability, and low vibration.
Powered by an optimized 740W motor, it delivers stable torque without the risk of overheating common in overpowered units. This design philosophy focuses on protecting the armature and extending the tool's lifespan, making it the preferred choice for professionals who need a reliable partner for continuous metal finishing and deburring.
Why Choose the HDC-100?
⚖️ Balanced 740W Motor Optimized power output ensures low vibration and smooth operation. The 740W rating provides ample torque for grinding while preventing motor burnout caused by excessive heat in high-wattage alternatives.
🛡️ Auto-Stop Carbon Brushes Equipped with intelligent Carbon Brushes (KD-10). The tool automatically stops when brushes are worn down, preventing damage to the motor armature and significantly extending tool life.
🔌 Safety & Durability Features a Double Insulation structure for maximum operator safety (no grounding required). The robust, movable power cord design resists twisting and entangling during complex work.
📡 EMC Compliant Complies with international EMC standards. Built-in noise prevention ensures the tool does not interfere with other sensitive electronic equipment in your industrial facility.
Technical Specifications
Model
HDC-100
Wheel Diameter
100 mm (4 inch)
Rated Power Output
740 W
No Load Speed
12,000 min⁻¹
Carbon Brush Model
KD-10
Weight
1.6 kg
Safety Features
Double Insulation, Auto-Stop Brushes
Global Export Note: When exporting to other countries, we customize the equipment (Voltage/Plug type) according to local power grid standards. Please contact us to confirm specific requirements in advance.
Professional Applications
The HDC-100 is engineered for precision tasks where control matters more than brute force:
Fine Metal Finishing: Deburring steel, special steel, and cast iron with precision.
Weld Preparation: Smoothing welded surfaces without gouging the base metal.
Maintenance: Rust removal and paint stripping.
Non-Ferrous Metals: Finishing aluminum and copper with reduced vibration marks.
Frequently Asked Questions
Q: Why is the power 740W and not higher?
A: We prioritize durability and balance. A 740W motor provides optimal torque for 100mm wheels without generating excessive heat or vibration. Higher wattage motors often overheat and burn out faster under continuous load; our balanced design ensures long-term reliability.
Q: What is the benefit of "Auto Stop Carbon Brushes"?
A: Auto-stop brushes automatically cut power to the motor when the carbon wears down to a specific level. This protects the commutator from damage, saving you from expensive motor repairs.
Q: Is this tool light enough for one-handed use?
A: Yes. Weighing only 1.6kg with a slim body design, the HDC-100 is lightweight and easy to handle, reducing operator fatigue during extended use.
Related Products
Enhance your productivity with our compatible accessories:
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.
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