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Glossary Index

A B C D E F G H I J K L M P Q R S T U V W

Tapes - Pocket

Tapes - Pocket

Blade

A good quality pocket tape should have a hardened and tempered blade which is concaved for rigidity. It should also have a coating to protect the figures and graduations against wear.

Case

The construction of the case is important. Plastic is lighter, but metal more robust.

The mouth piece should enable easy reading and the size of the base should be clearly stated so that where it is pressed against the inside of a right angle, the known width may be added to the measurement.

Hook

To ensure that the measurement starts at zero, a moveable hook-end should be fitted. This should move to compensate exactly for its own thickness so that when taking end-on or hook-on measurements, the reading starts from true zero.

Measuring inaccuracies can occur with tapes which have fixed ends.

Lock

The blade lock is useful for repetitive measuring and also enables easier reading when measuring in restricted or confined spaces where the blade may be locked in the measuring position but read away from the work.

Spring Return

A spring return refers to an automatic spring return mechanism when the blade is rewound. Tapes without automatic return are sometimes described as 'pull-push'.

Spring return tapes should not be allowed to fly back uncontrolled from the extended position to prevent hook/blade damage. Allowing a blade to fly back uncontrolled is also potentially dangerous for the user and any bystanders.

Width

The most popular pocket tape blade width is 1/2in (13mm). However, 3/4in (19mm) or 1in (25mm) blades are required for overhead measuring work where the blades need to be extended vertically or for unsupported horizontal measuring.