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A stopped groove is a channel that ends before the edge of the workpiece. It may house a shelf, divider, drawer runner, or panel. Cutting one cleanly with a chisel is mostly a marking and control exercise: the chisel removes the waste, but the layout determines whether the groove looks crisp.
Tools and materials
Use a sharp bevel-edge chisel narrower than the finished groove. A 6 mm chisel suits a narrow groove; for a 12 mm groove, an 8 or 10 mm chisel is easier to control than trying to remove the full width in one cut. You will also need a marking knife, pencil, square, mallet, and a second chisel for clearing waste.
A basic bevel-edge chisel set is sufficient for occasional work. The cheapest chisels can do the job if the steel holds an edge and the backs are reasonably flat. Do not spend heavily on a complete premium set if you only cut a few stopped grooves; one well-prepared 6 mm or 8 mm chisel is more useful than twelve blunt ones.
For repeated furniture work, a marking gauge gives more consistent parallel lines than measuring each side with a ruler. A wheel marking gauge is particularly good at scoring a clean shoulder, though a sharp knife and combination square are perfectly adequate for a single project.
Choose the right chisel and sharpen it
The chisel should be narrower than the groove by roughly 2 to 4 mm. This leaves room to work from both sides without bruising the finished walls. A chisel that exactly matches the groove width can work, but any slight error in alignment becomes visible and the tool tends to bind.
Sharpen the bevel at about 25 degrees, with a small 30-degree micro-bevel if you want a tougher edge for mallet work. Flatten the first 10 to 15 mm of the back. A ragged back will not pare a straight shoulder, even if the bevel looks polished.
| Groove width | Useful chisel size | Best approach |
|---|---|---|
| 6–8 mm | 4–6 mm | Chop lightly, then pare to the lines |
| 10–12 mm | 6–8 mm | Remove the middle first, finish both walls |
| 15 mm or wider | 8–12 mm | Use a narrow chisel for corners and a wider one for waste |
Mark the groove accurately
Mark both long edges with a knife, not just a pencil. Set a square against the reference edge and make the stopped end line several times until it is clearly cut. Extend the side lines only as far as needed, or cover the surrounding surface with low-tack tape to make accidental scratches less likely.
Mark the groove on both faces if the workpiece is thick enough to make the depth difficult to judge from one side. Set the depth with a gauge or mark a line on the chisel using tape. A common furniture groove is 3 to 6 mm deep. Going much deeper with a chisel alone increases the chance of drifting walls and splitting the stock.
Clamp the work securely with the face side up. Place a scrap block against the stopped end if possible. The block provides a physical limit and supports the fibres, but it must not cover the layout line.
Establish the stopped end first
The stopped end is the most visible and the easiest place to overshoot. Hold the chisel with its bevel facing the waste side and place the cutting edge exactly in the end line. Give one light tap, then deepen the cut with two or three controlled taps. Do not try to reach full depth immediately.
For a groove stopping in the middle of a board, establish a narrow vertical wall at the end, then make a second cut 1 to 2 mm into the waste. This creates a small trench behind the finished wall. Work progressively toward the middle of the groove rather than levering against the clean end.
Keep the chisel vertical by sighting from two directions. A tilt at this stage produces an angled end that is hard to repair. If the grain is prone to tear-out, score the end line with a knife several times before chopping.
Remove the waste in stages
With the end established, make a series of shallow cuts along the groove. Start about 2 mm inside each side line and leave a central ridge of waste. Chop across the grain where practical, spacing the cuts 3 to 5 mm apart. Keep the mallet taps moderate; heavy blows often drive the chisel below the depth mark and can split the board.
Remove the loosened chips by levering upward only from the waste area. Never twist the chisel against a finished wall. If the waste is long-grained and refuses to break, make more closely spaced cuts rather than forcing it.
At this stage, stop about 1 mm above final depth. Clear the middle with a wider chisel if you have one, keeping its corners away from the marked walls. The cheaper option is fine here: an old but sound chisel can remove bulk waste, provided it is not so blunt that it requires excessive force.
Pare the walls and bottom
Turn the chisel so the bevel faces up and use the flat back as a reference when paring the groove walls. Take shavings less than 1 mm thick. Work from the open end toward the stopped end, finishing with a light cut into the end wall. This direction reduces the chance of driving fibres past the stop.
Check the width with the part that will fit into the groove, not just with a ruler. It should enter with firm hand pressure but not need hammering. Test the depth with a short offcut of the mating material; a nominal 6 mm groove may need to be 6.5 or 7 mm deep if the panel has slight thickness variation.
For the bottom, hold the chisel bevel down for controlled chopping, then bevel up for the final paring pass. A perfectly polished bottom is unnecessary unless the joint is visible or must seat tightly. Remove loose fibres and high spots, but do not widen the walls while chasing cosmetic marks.
Avoid common failures
Blowout at the stopped end usually comes from chopping toward an unsupported edge or taking too deep a bite. Re-score the line, use lighter taps, and leave the final 0.5 to 1 mm for paring. A wandering groove usually means the chisel is too wide, the layout line is faint, or the work is moving. Re-clamp and return to the knife lines rather than correcting by eye.
If you regularly cut narrow stopped grooves, a bench chisel set with thin side edges is a worthwhile upgrade. For one repair or a small project, sharpening the chisel you already own and taking smaller cuts is normally the better buy.