Torsion Springs

Helical springs used to apply torque or store rotational energy are commonly referred to as torsion or double torsion. Torque by definition is a force that produces rotation. A torsion spring exerts a force (torque) in a circular arc, and the arms rotate about the central axis. The stress is in bending, not in torsion. It is customary to specify torque with deflection or with the arms at a definite position. Formulas for torque are in pound-inches or inches-pounds. If ounce-inches are specified the value should be divided by 16 to use the formulas in the inch-pound system.


Torsion & Double Torsion Spring Specifications

When Ordering a Torsion or Double Torsion Spring Remember to Give The Following Information As Completely As Possible:

Inside or Outside Diameter.
If spring works on a rod, give size of same, as spring must not bind when wound up to its limit of travel.
Free length and number of coils. If spring cannot increase in length as wound up, allow sufficient space between coils.
Right or Left Hand Wound.
Wire Size. Decimal size if possible. Material, Kind and Grade.
Style of Ends . Number of turns deflection to hold given load and radius of loaded arm. This length may be the length of the arm, or the arm may be attached to a movable machine member, in which case the length to point of application of load is given.
Finish, Plain unless otherwise specified.