Rail and stile joint

Widely used by makers of kitchen cupboards, this type of joint is directly based on the tongue and groove joint; the two parts to be joined are machined according to complementary forms (or “profiles”). This variation of the “tongue and groove” joint has been developed sufficiently to justify its own description.

This type of joint, quick and easy to make with adequate equipment (router), provides sturdiness and a large contact surface on which to apply glue.

Moreover, not only do you make both the profile for joining parts and the groove for inserting the central panel (following the example of the tongue and groove joint), but you also make the interior finish moulding!
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When
The tools
How
1. Machine one of the long sides
2. Machine the ends of rails
3. Proceed to the final assembly
4. Variation
5. To strengthen joints

When

Used for making central panel doors (for a variety of cabinets and furniture).

The tools

You’ll need a router with table, and a reversible rail and stile bit (or two complementary bits). The reversible bit is comprised of two parts that can be inverted to produce both the male and female part, thus avoiding the purchase of two bits.

How

We’ll join A studs to B rails to form a cabinet door.

1. Machine one of the long sides

Mount the bit by inserting first the moulding cutter knife and then the straight knife (the one that will dig the groove). Following the instructions of your router’s manufacturer, machine one of the long sides of each stud A as well as each B rail.

2. Machine the ends of rails

Then mount the bit by inserting the straight knife, and then the moulding cutter knife, and machine the ends of rails B; the form thus obtained will complete the one made on the studs, and the parts will fit to perfection.

3. Proceed to the final assembly

Make a first dry joint: secure the bottom rail to the two A parts, with the grooves facing inward, and then slide the panel in the slits. Then insert the last part B in the two A parts; your door is completed. Disassemble, glue and reassemble.

4. Variation

The variations on this theme consist of bits with various shapes, chosen to vary the moulding finish. If the bit is only comprised of straight parts (i.e., does not have a profile designed to form a moulding), we obtain… a traditional tongue and groove joint.
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