Symptoms
- Plane skips or chatters instead of cutting smoothly
- Shavings come out thick on one side, thin on the other
- Plane digs in or stalls mid-stroke
- Surface left rough or scalloped after planing
Likely causes
- CommonBlade (iron) is dullA dull edge tears fibers instead of slicing them cleanly.
- CommonBlade set unevenly (lateral adjustment off)One side of the blade protrudes more than the other, cutting unevenly.
- PossibleCutting depth set too deepToo aggressive a cut causes chatter and digging in, especially against the grain.
- PossibleSole of the plane not flat or waxedA rough or dry sole increases friction and causes stuttering strokes.
- Less commonPlaning against the wood grainCutting against the grain direction tears fibers regardless of sharpness.
What to do
- Remove the blade and check the edge for sharpness; sharpen on stones if it's dull or nicked.
- Reinstall the blade and use the lateral adjustment lever so the edge is even side to side.
- Back off the depth adjustment to take a thinner shaving, then increase gradually until it cuts smoothly.
- Wax the sole of the plane lightly with paraffin or a candle to reduce friction.
- Check the direction of the wood grain and plane with it, not against it, to avoid tearout.
- Take light, even strokes the full length of the board rather than short choppy passes.
- Test on scrap first and readjust depth or lateral setting until shavings come off uniform and thin.
Tools and parts
- Sharpening stones
- Screwdriver (for some plane adjustments)
- Paraffin wax or candle
Replacement plane iron/bladeSearch: “hand plane replacement blade”
When to call a pro
A woodworking specialty shop can flatten a warped plane sole or true up an old plane's frog and adjustment mechanism.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.