stock. When using the miter square, the 45 degrees face of the stock
is placed against the edge of a board; then the blade will be at a 45
degree angle with the edge of the board. The scale on the blade is
divided into eighths of an inch.
Figure 2-47.
Miter square
c. Combination Square. A combination square does the work of a
rule, square, depth gauge, and level (Figure 248, page 226). The
name combination square indicates that you can use it as a try or
miter square. It differs from the try and miter squares in
appearance, and you can move the head to any desired position on the
blade. The head slides in a groove located in the center of the
blade. This groove also permits removal of the head so that the
blade may be used as a rule or a straightedge. A spirit level is
installed in the head, permitting it to be used as a level. A
centering head, which can be substituted for the head, is used to
locate the center of shafts or other cylindrical pieces. A scriber
is also inserted in the head to be used for laying out work. The
protractor head is used to set different angles. In the construction
of this tool, the blade is hardened to prevent the corners from
wearing round and detracting from its value as a measuring instrument.
2-25
EN5155
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