Miter boxes hold a saw in the proper position to make cuts at precise angles, typically 45
degrees. The result is an edge called a miter, which may be joined with another to form
a right angle, as in a picture frame. Miter boxes are made from metal, wood, or plastic.
Using a Miter Box
To use a miter box, mark the stock for cutting, then place it in the box so the mark
aligns with the desired slots. To protect the bottom of the box, place the stock on a
thin scrap of wood or cardboard. Insert the saw - usually a backsaw
or hacksaw, which
cut more precisely than other handsaws - into the slots and make the cut, allowing the
miter box to guide the saw. To help hold the box securely to your workbench, attach a
wooden plate to the bottom of the miter box. Clamp the plate to the bench where needed.
To prevent stock from slipping, line the bottom of the miter box with a strip of
sandpaper - use carpet tape to hold it in place. However, avoid placing sandpaper where
the saw blade will touch it.
Purchasing
The simplest miter box is merely a U-shaped structure made of hardwood or plywood. Slots
in the sides help you guide a saw when making 45- and 90-degree cuts in stock placed in
the bottom.
Metal miter boxes are adjustable; a built-in dial sets the saw's angle. These
come in a variety of sizes and some come with the saw built in. Smaller models can cut a
board 6-1/2 inches wide and 4-1/2 inches high (at 90 degrees). Larger versions cut boards
up to 8 inches wide and 7 inches thick.
Other Names
Metal adjustable miter box; wood miter box
Substitutes
An alternative to the miter box is a powered miter saw.
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