A compact 3.5kg FUJI KOSOKU grinder for intermittent heavy grinding at mobile workstations, including suitable fabrication, ship-repair and rail-maintenance weld work.
Duty limit: not recommended for prolonged overload grinding or continuous high-pressure foundry work.
Confirm the electronic drive's mains input separately from the grinder's required 200V / 400Hz supply.
The FUJI KOSOKU HGP-4260 is a 7-inch / 180mm high-frequency angle grinder weighing 3.5kg. Its compact pot-shaped motor housing places the motor above the wheel, with its axis perpendicular to the wheel plane. This short layout supports handling at changing workstations where substantial material removal is needed in short working periods.
Application focus: intermittent heavy grinding in fabrication, ship repair and suitable rail-maintenance weld work. It is not recommended for prolonged overload grinding or continuous high-pressure foundry work.
The grinder requires three-phase 200V at 400Hz supplied by a compatible electronic HFD Driver (high-frequency drive / inverter). Do not connect it directly to a normal 50/60Hz mains supply, even if that supply is three-phase 200V.
The drive's mains input and its output to the grinder are different specifications. Confirm the HFD unit's input voltage, frequency, capacity and approved output cable before ordering. The grinder's 200V / 400Hz rating describes the supply at the tool.
This HGP-4260 system uses an electronic inverter rather than a rotating motor-generator frequency converter. Traditional Japanese 250Hz and European 300Hz grinder systems may use such mechanical high-frequency generators. Their frequency, electrical connections and compatible tools differ: a 250Hz or 300Hz system is not an interchangeable power source for this 400Hz tool. Frequency alone also does not establish compatibility; use an approved machine-and-drive combination.
Review the FUJI 400Hz inverter power supply and confirm the exact compatible drive configuration with FUJI.
A dedicated output cable is required and is listed separately in the catalog. Specify cable length, connectors and workplace layout when requesting a system quotation.
Choose the HGP-4260 for short periods of heavy grinding at mobile workstations: dressing accessible ship-repair welds, local steel-fabrication cleanup and appropriate rail-repair weld grinding under the approved maintenance procedure. Access, required finish and the wheel must suit the job.
The electronic supply system has limited tolerance for impact loads and overload. Prolonged excessive grinding pressure can shorten the service life of the tool and drive. Heavy-duty designation does not mean unlimited overload capability. For sustained foundry stock removal or long continuous high-load cycles, ask FUJI to select a system for that duty instead.
No universal run/rest time is specified here. Follow the machine and drive manuals for loading and thermal limits, and stop to investigate protection trips rather than repeatedly resetting them.
| Model | HGP-4260 |
|---|---|
| Wheel diameter | 180mm / 7-inch |
| Required tool supply | Three-phase 200V, 400Hz from a compatible electronic HFD inverter |
| Current / power consumption | 9.5A / 2,600W |
| Tool weight | 3.5kg |
| Catalog dimensions | 309mm length / 125mm height |
| Spindle connection | M10 × 1.25 female thread; use the prescribed mounting parts |
| Wheel speed rating | Catalog specifies 80m/s wheels; verify the wheel's marked maximum RPM against the machine nameplate |
| Output cable | Dedicated cable required; ordered separately |
Confirm the exact wheel bore, mounting arrangement, permitted wheel thickness and rated machine speed before selecting consumables. Do not infer these from another HGP model.
For economical everyday steel weld grinding, consider the Super F2 180mm grinding wheel. For more demanding stock removal, ask about a suitable Super Z zirconia grinding wheel matched to the material and mounting system. Better abrasive selection can improve removal efficiency without relying on excessive pressure.
Use only the approved 180mm high-speed wheel configuration with the correct flanges and guard. The catalog calls for 80m/s wheels; a matching diameter alone does not prove compatibility.
This existing video provides context for the FUJI high-frequency range. Use the HGP-4260 specifications above when selecting this model.
No. Specify a compatible electronic drive supplying three-phase 200V at 400Hz. Do not substitute a traditional 250Hz or 300Hz generator system.
No. Ordinary mains frequency is not 400Hz. The dedicated compatible electronic inverter is required between its approved mains supply and the tool.
No. Its recommended role is intermittent heavy grinding at mobile workstations. Prolonged overload can reduce service life; select another suitable system for sustained demanding duty.
The catalog identifies HGP-4260 for heavy grinding at 2,600W, 9.5A and 3.5kg, and HGP-4160 as the lighter 1,600W, 6.5A and 2.7kg version. Do not transfer dimensions or electrical ratings between models.
Send your material, grinding task, typical run time, working pressure, available mains supply, cable reach and quantity. FUJI can help match the grinder, electronic HFD power supply, dedicated cable and abrasive to the application.
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.
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.
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.
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.
