Trozos rectos de madera contrachapada de tamaño reducido

An undersized plywood straight bit is a router bit ground to match the actual thickness of modern plywood rather than its nominal dimension. Because a sheet labeled 3/4 typically measures closer to 23/32, a standard 3/4 straight bit cuts a dado that is loose. An undersized bit produces a snug, accurate fit in a single pass.

The most common undersized straight bit sizes are 23/32 (for nominal 3/4 plywood) and 15/32 (for nominal 1/2 plywood). These dimensions correspond to the actual measured thickness of most domestically produced and imported plywood available in the United States.

You can make two offset passes with a standard bit to widen the dado to the correct dimension, but this approach requires a test piece, careful fence adjustments, and additional time. An undersized bit produces the correct width in a single setup pass, which is faster and more consistent across a production run.

For straight bits in cabinet work, a 1/2 shank is strongly preferred when available. The larger shank diameter reduces vibration and deflection compared to 1/4 shank bits, producing straighter dado walls and a cleaner flat bottom. Use 1/4 shank only when your router does not accept 1/2 collets.

Yes. Undersized plywood straight bits fit standard router collets (1/2 or 1/4 shank) and work in any router table, handheld router, or router sled setup. They require no special hardware beyond the appropriate collet size.

Yes. The Infinity Tools woodworking tools collection includes a broad range of router bits for joinery, profiling, and surfacing suited to cabinet and furniture construction.

Standard practice is to cut dadoes to one-third the thickness of the panel being dadoed — so in 3/4 stock, a 1/4-deep dado is typical. Deeper dadoes weaken the panel above the groove and are rarely necessary for shelf loads in typical cabinet construction.

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Use a dial caliper or digital caliper to measure the actual thickness of the specific plywood you plan to use — not the nominal label — and choose the undersized bit closest to that measurement. Plywood thickness can vary between sheet lots and manufacturers.

The Infinity Tools Learn blog includes practical articles on dado routing, router bit selection, and cabinet construction techniques for woodworkers at all skill levels.