Claire WhitakerBy Claire Whitaker

Updated November 2026

Yes, a router can cut completely through wood, and it does so routinely for dadoes, slots, circles and profiles. The key is matching the bit to the material, setting the cutting depth correctly and taking the cut in several passes instead of one heavy pass. This guide walks through how to make a full-depth cut safely and cleanly.

What Determines Whether a Router Cuts Through Wood

A router can cut through most solid wood and plywood, but three things decide whether the cut succeeds. The first is bit diameter and flute length, since the bit must be longer than the thickness of the stock. The second is the router’s power and motor condition, because a weak tool will bog down in hardwood. The third is your feed rate and depth per pass, which control heat, tearout and bit wear.

Shopping for one? See our guide: 7 Best Router Bit to Cut Wood Options for Every Project (2026).

How to Cut Fully Through Wood with a Router

  1. Choose a straight or spiral bit with a cutting length at least 1/8 inch longer than your stock thickness.
  2. Clamp the workpiece firmly to a bench or spoil board, with a sacrificial board underneath so the bit can exit without marring your bench.
  3. Set the first pass to a depth of about 1/4 inch, or roughly one-third of the bit diameter for hardwoods.
  4. Make the cut, moving the router against the direction of rotation (the feed direction matters; see the guide to Wood Router Direction of Cut: Feed Right Way to Prevent Tearout (2026)).
  5. Increase depth in steps of about 1/4 inch per pass until the bit breaks through the bottom.
  6. Make a final light pass at the full depth to clean up the cut edges.

Why Multiple Passes Beat One Deep Cut

Taking the full depth in one pass overloads the motor, scorches the wood and deflects the bit. Shallow passes keep the router under load, reduce tearout and extend bit life. A three-pass approach on 3/4-inch plywood, for example, usually yields a far cleaner edge than a single plunge.

Choosing the Right Router and Bit for Through-Cuts

For through-cutting, a fixed-base or plunge router with at least moderate horsepower handles most home-shop work. Use a sharp, high-quality carbide bit, and replace or resharpen it when edges start to burn or chatter. If you are building a dado or groove, the guide on How to Cut Grooves in Wood with a Router: A Step-by-Step Guide covers setup in more detail.

Material Suggested depth per pass Feed approach
Softwood (pine, cedar) Up to 1/2 inch Steady, moderate feed
Hardwood (oak, maple) 1/4 inch Slower feed, let the bit work
Plywood 1/4 inch Light passes to protect face veneer

Common Mistakes When Cutting Through Wood with a Router

  • Setting too much depth on the first pass, which burns the wood and stalls the motor.
  • Forgetting a sacrificial backer board, leaving blowout on the underside.
  • Feeding too fast in hardwood, causing chatter and rough walls.
  • Using a dull bit, which produces scorching and extra heat.
  • Skipping clamps or hold-downs, so the workpiece shifts mid-cut.
  • Carbide straight bits hold an edge longer in plywood and hardwood, which keeps through-cuts clean. View on Amazon
  • Stop collar set lets you repeat consistent depths across multiple passes. View on Amazon
  • Edge guide keeps the router tracking straight along a board’s edge. View on Amazon

FAQ

Can a router cut through 3/4-inch plywood in one pass?

It can, but it is not recommended. Making the cut in two or three passes reduces tearout on the face veneer and protects the motor and bit.

Do I need a special bit to cut all the way through?

You need a bit with a cutting length longer than your material’s thickness. A standard straight bit with adequate flute length works for most through-cuts.

Is a plunge router better for through-cuts?

A plunge router lets you set and adjust depth easily between passes, which makes it convenient for multi-pass work. A fixed-base router works well too if you set depth carefully.

Conclusion

A router can cut fully through wood when you match the bit length to the stock, take the cut in several shallow passes and support the workpiece with a sacrificial backer. Start with softwood or scrap to build a feel for feed rate before tackling finished stock. With those habits in place, through-cuts become a reliable part of your routine.

Ready to choose one?

Claire Whitaker

About Claire Whitaker

Claire Whitaker is part of our editorial team and reviews and edits our woodworking guides, checking product details against manufacturer specifications and owner feedback.