Shipyard steel grinding involves more than removing metal quickly. Operators must clean welds, remove sharp burrs and control the transition into the surrounding plate without unnecessary rework. FUJI Super F2 grinding wheels provide an economical option for these routine jobs, balancing grinding efficiency and operator comfort.
This application guide focuses on 4-inch and 7-inch Super F2 wheels for ordinary steel. It explains where the improved 24S specification fits, how to select wheel size and what a shipyard should check during a practical trial.
Shipyard grinding requires controlled material removal around welds and steel plate edges.
These are everyday steel fabrication tasks. They should be distinguished from continuous heavy stock removal, precision finishing and grinding of copper-alloy propellers, each of which calls for a different abrasive selection.
Super F2 uses aluminum oxide abrasive and Japanese warm-pressing technology. Its practical role in the FUJI range is economical, general-purpose grinding of ordinary steel. It is designed to balance removal efficiency, useful wheel life and comfortable handling for routine workshop and shipyard work.
The compact Super F2 format supports everyday steel grinding where access and control matter.
FUJI recommends the improved 24S Super F2 when higher grinding efficiency is required in routine steel work, particularly in Southeast Asian shipyards. In this designation, 24 identifies abrasive grit size and S identifies the wheel grade—the bond's grain-holding strength. S is not a different abrasive material.
Ask for the improved 24S version explicitly when requesting a sample or quotation. Confirm the diameter, thickness, bore and speed marking of the supplied wheel; do not assume that every Super F2 variant has the same specification.
The improvement should be assessed on the user's actual steel, weld geometry and grinder. This article does not assign a universal percentage gain in speed or wheel life: results depend on contact area, machine performance, pressure and the required finish.
| Selection point | 4-inch / 100mm | 7-inch / 180mm |
|---|---|---|
| Typical work | Short welds, brackets, local burr removal and accessible corners | Longer accessible welds, plate edges and broader steel surfaces |
| Practical advantage | Compact tool setup for positioning and local control | Larger working format where the workpiece and tool access permit |
| Check before selecting | Guard clearance, reach and compatible small grinder | Grinder capacity, handling posture and room for the guard |
| Product details | 4-inch Super F2 | 7-inch Super F2 |
A larger wheel is not automatically the better choice for every weld. Compare the complete grinder-and-wheel setup, including access and operator control. Never fit a larger wheel to a machine designed for a smaller diameter.
Japan-market and overseas specifications: FUJI offers a Japan-market Super F2 specification rated at a maximum peripheral speed of 72 m/s, with greater emphasis on comfortable grinding, and an overseas-market specification rated at 80 m/s, with greater emphasis on grinding efficiency. These are maximum ratings for the respective wheel specifications, not instructions to change a grinder’s speed. Confirm the version supplied for your market.
Read the actual wheel label. Where 80 m/s is marked, it is the maximum permissible peripheral speed, not a target operating speed and not an RPM value. The wheel's marked maximum RPM must be at least the grinder's rated maximum spindle speed. Confirm thickness, bore, flanges, guard and intended application before installation.
Cebu shipyard environment: a relevant setting for evaluating everyday steel grinding requirements.
During visits to shipyards in Cebu and Manila, FUJI demonstrated Super F2 for steel-plate weld cleanup and deburring. These activities are described in the Philippine market visit report. They provide application context; this page does not present a controlled numerical performance result for Super F2.
For a meaningful comparison, use equivalent workpieces and the same acceptance criteria. Record time per accepted weld or edge, wheel consumption, rework and operator feedback. Comparing purchase price alone can miss the labor cost of slow removal or repeated finishing.
Super F2 suits economical daily steel grinding. For more demanding stock removal, evaluate Super Z zirconia grinding wheels. For blending grinding marks, consider a suitable flap disc. A finer abrasive step does not by itself establish compliance with a ship's coating specification.
Where sustained tool performance is important, assess a compatible FUJI high-frequency grinder and converter system alongside the wheel. Power-system compatibility and abrasive speed limits must both be checked. Related regional activity is covered in the Batam, Indonesia shipment update.
Yes. Its economical aluminum oxide formulation suits ordinary steel weld cleanup, deburring and local surface grinding. Choose the wheel specification and machine to match the actual workload.
FUJI identifies improved 24S as a higher-efficiency option for these tasks, particularly in Southeast Asian shipyards. Confirm the exact supplied version and evaluate it on representative work before standardizing it across the yard.
No. Grit size alone cannot guarantee the required cleanliness or surface profile. Follow the coating manufacturer's preparation requirements and the shipyard specification. The FUJI grit and wheel-grade guide explains the distinction between grit numbers and grade letters; it does not replace the specification of a particular Super F2 wheel.
This guide addresses ordinary steel. For dedicated stainless work, evaluate Super W or JITAN against the task and material requirements. Keep abrasives previously used on carbon steel separate from stainless work to reduce cross-contamination.
The following English summaries paraphrase customer comments on MonotaRO's Super F-II listing, checked on 6 October 2026. They concern the Japanese-market product family, not a controlled trial of the overseas improved 24S version.
These are individual experiences, not guaranteed results. If vibration or wobble occurs, stop and inspect the wheel, mounting and grinder before continuing.
Abrasive manufacturing expertise since 1953. FUJI specializes in resin-bonded grinding and cutting wheels, combining more than 70 years of experience with control over materials, formulation and production in its own manufacturing operations.
Japanese production and quality-control practices. FUJI applies Japanese JIS production and quality-control requirements in its manufacturing operations to support consistent quality. Warm-pressing expertise and application-specific formulations help the company offer both economical everyday wheels and higher-performance alternatives. Confirm any certification requirement against the documentation for the exact product supplied.
Selection support for real working conditions. For shipyards, the useful starting point is the material, removal task, grinder and acceptable finish. FUJI can help identify the appropriate Super F2 size and market specification, including improved 24S, for evaluation on the customer's work.
Tell FUJI the steel material, grinding task, preferred diameter, grinder model and required finish. Specify whether you want to evaluate the improved 24S version. FUJI's abrasive manufacturing experience dates to 1953.
Select and evaluate the wheel as part of the complete grinding process.
Contact FUJI for application selection | View the FUJI catalog
