Uneven bevels can show up as a change in height, a row of small flat faces, or plunge lines that start in different places. Start by identifying what’s uneven. The bevel is the ground face that tapers toward the edge. The plunge is where that face ends near the handle. A finer belt can clean up the scratches on either area, while fixing the shape requires deciding where steel still needs to come off.
- Mark the referenceWith the grinder stopped, mark the intended plunge and grind height on both faces.
- Inspect both sidesCompare the heel, middle and tip in the same light.
- Check contactMake a controlled pass and look at where fresh scratches appear.
- Recheck before refiningCheck the shape before committing to a finer belt.
Look for separate facets on a flat bevel
Turn the blank under angled light. If several bands reflect at different angles, the bevel may have several small faces. That can happen when you rock the blank or change the angle between passes. A light pass against a flat platen can reveal where the belt is touching. Practice on scrap until you can hold the angle through the part of the pass where it tends to change.
If only one strip shows fresh scratches, check how the bevel sits against the platen. Avoid grinding the entire face deeper while trying to reach a low area. Check the material left at the edge and your layout before correcting the shape.
Compare the plunge from both sides
Look at how far each plunge sits from the handle and how high it rises into the bevel. Some knifemakers establish the plunge early and grind the bevel up to it. Others leave extra material near the plunge during rough grinding and refine it with a finer belt. The second approach gives you time to compare the sides while you still have room to adjust.
If one plunge is already farther back than planned, stop and compare both faces before correcting the other. Removing more steel at the deeper plunge will move it farther. Check your layout marks and whether you can bring the two sides into line while preserving the intended shape.
| Symptom | Check first |
|---|---|
| Several shiny bands on a flat bevel | Look for a change in angle during the pass. |
| Plunge farther back on one side | Compare the layout marks and where contact starts. |
| A dip near the heel | Look for rocking or extra pressure while working the plunge. |
| One deep line in an even finer pattern | Check whether it is an older scratch that still needs to be cleared. |
Choose the next belt after checking the shape
Some makers rough in a bevel at 36 when there’s substantial stock to remove. Others start at 60 for a more controlled cut. Leave room to refine the bevel and the plunge whichever belt you start with. Once the shape is where you want it, use the grit progression guide to decide whether to go straight to 120 or use 80 in between.