Symptoms
- Visible nick or chip along the cutting edge
- Edge catches or skips instead of cutting smoothly
- Uneven cut line with a repeated gouge mark
- Chip visible as a bright dot under light
Likely causes
- CommonStruck a nail, staple, or other metal hidden in woodMetal is far harder than the chisel's edge and chips it instantly.
- CommonChisel was dropped or struck edge-firstImpact on a hard floor or surface can chip a fine edge.
- PossibleEdge was too thin or over-honedAn excessively acute bevel is more fragile and chips easier.
- PossiblePrying with the chisel instead of cuttingUsing it as a lever puts sideways stress the edge isn't designed for.
What to do
- Inspect the chip's depth; shallow nicks can be grould out, deep ones may need more material removed.
- Use a coarse stone or a bench grinder (if available) to grind the edge back evenly until the chip disappears.
- Keep the tool cool while grinding by dipping frequently in water; overheating on a dry grinder can ruin the temper.
- Re-establish the bevel angle on a medium stone once the chip is gone.
- Finish on a fine stone and strop to bring back a clean, sharp edge.
- Test the edge on scrap wood to confirm it slices cleanly without catching.
- Inspect stock for hidden nails or staples before chiseling into reclaimed wood in the future.
Tools and parts
- Bench grinder or coarse stone
- Medium and fine sharpening stones
- Water for cooling
- Strop
When to call a pro
For a valuable or antique chisel, a professional sharpener can regrind the chip out while preserving as much of the blade length as possible.
Safety
Use caution
Wear eye protection when grinding; sparks and metal fragments can fly, and overheating the steel can throw off small hot chips.