The easiest method and the one i most commonly use is to use the table saw for both the tongue and the groove.
Tongue and groove with table saw.
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In our case the legs are much thicker than the rails so we can t flip the boards end for end to center the groove.
Save yourself a bundle by cutting your own wood to width.
Run your piece on both sides.
Make the usual double pass to guarantee that your groove is exactly centered.
Setting the tongue and groove of the new board.
Every woodworker should be familiar with cutting them on the table saw.
When joining two matched boards into one a tongue and groove joint is much stronger than a simple butt joint.
For the tongue use a regular blade also.
Measure your tongue opening to try and get the proper fit but use a scrap piece to make trial cuts until you get a snug fit.
To produce a tongue and groove on the table saw use a dado cutter rather than your everyday blade unless your stock is 3 8 or less in thickness.
Measure the face width of the existing flooring add the width of its tongue then set the table saw s fence that same distance away.
Using the table saw is easiest when all the material stock is the same thickness.
Thicker stock calls for a wider groove.
The cuts made when creating the two mating workpieces of a tongue and groove joint are non through cuts meaning that the saw blade never goes all the way through the wood.
It could be 1 4 to 3 16ths wide.
When making tongue and groove with a table saw it s always important to practice safety at all times.
The tongue and groove joint can be easily created using a router with a matched set of router bits or on a table saw using a stacked dado blade set.