A depressed center grinding wheel is selected for a specific material, grinder and grinding operation. For workshops considering FUJI Nattoku, the useful question is whether the exact wheel specification removes the required material at an acceptable finish and cost. Brand name alone does not establish compatibility or safety.
Use the FUJI Nattoku product page to identify the available specification, then confirm its application with FUJI. Steel-fabrication tasks to discuss include weld reinforcement removal, edge deburring and local surface preparation. Material approval, wheel dimensions and operating limits must be checked for the particular supplied wheel.
Grinding and cutting are different operations. A grinding wheel is not automatically a cut-off wheel, and a thin cut-off wheel must not be used for side grinding. If the next process needs a finer cosmetic finish, allow a separate finishing stage.
| Selection point | What to confirm | Reason |
|---|---|---|
| Workpiece | Steel grade, coating and required stock removal | Material and coatings affect selection and exposure controls. |
| Grinder | Diameter, spindle or bore, flanges, guard and maximum speed | Physical fit alone does not establish approval. |
| Wheel marking | Application, type, dimensions, maximum RPM and any service-life marking | The actual label and manufacturer instructions govern use. |
| Finish | Remaining stock, tolerance and next process | Overgrinding creates avoidable repair work. |
Inspect the disc visually before mounting: look for cracks, edge damage, distortion, dampness or damage around the mounting hole. Check label legibility and storage condition. Reject damaged discs or discs of uncertain condition. Never modify the bore or force a disc onto a spindle.
Check the guard and mounting components against the tool instructions. The grinder's maximum speed must not exceed the wheel's marked maximum RPM. A value in m/s describes peripheral speed; it is not RPM. Use the marked RPM for the actual wheel size.
Do not use a clear ringing sound as the acceptance test for these reinforced resin discs. Ring testing associated with vitrified wheels does not replace the visual, label, damage and mounting checks required here. Follow the prescribed start-up procedure and keep other people clear.
Secure the workpiece, fit the approved guard and handle, and follow the specified contact angle and pressure. Avoid jamming, twisting or forcing a stalled wheel. Apply the job's required protection and dust and spark controls. Stop if vibration, damage or abnormal noise appears.
If the wheel rubs, the grinder slows markedly or the part overheats, review the specification, tool condition and technique. More pressure is not a reliable cure. A wheel described as economical should still be assessed on completed, acceptable work.
Compare Nattoku and the current wheel on equivalent parts using the same approved tool and an agreed finish. Record grinding time, wheel consumption, changes, rework and operator observations. Repeat a consistent test across multiple parts to account for variation.
Cost per accepted part = wheel cost used per part + labour cost for grinding and changes + attributable rework cost. Low unit price alone does not establish lower operating cost. No percentage improvement is claimed here without a documented comparison.
Confirm approval for the exact specification and the job's contamination limits. Not every wheel in a family is necessarily approved for stainless steel or marked INOX.
No. Diameter, mounting, type, speed rating and guard compatibility must all match the tool instructions.
The required removal and finish determine the choice. See our semi-flex grinding wheel selection workflow for a task-based comparison.
Consult Norton grinding wheel safety guidance together with the instructions supplied with your wheel and grinder.
Send the workpiece material, operation, grinder model and speed, wheel dimensions and current difficulty. Include a photo of the wheel label and your required finish so we can discuss a suitable specification and a controlled trial.
