Ratio of spring length (L) to mean coil diameter (D).
Circular spring for preventing the axial movement by snapping into the groove formed on the shaft or the hole. (A grip ring is used for grooveless shafts.)
Solid height (H)
Length of a compression spring when under sufficient load to bring all coils into contact with adjacent coils.
Mechanical element designed mainly to unitse by elasticity or distoriion of an object.
Ratio of mean coil diameter (D) to wire diameter (d).
Generic term for washers for locking using the spring action.
Squared and ground ends
See Closed and ground ends.
See Closed ends.
Spring made of steel materials as called by its material.
The difference in operating stresses at minimum and maximum loads.
To subject springs to low-temperature heat treatment so as to relieve residual stresses.
A cold-wound process in which the material surface is peened to induce compressive stresses and thereby improve fatigue life.
Squareness of ends
Angular deviation between the axis of a compression spring and a normal to the plane of the ends.
Squareness under load
As in Squareness of ends, except with the spring under load.
A twisting action in torsion springs which tends to produce rotation, equal to the load multiplied by the distance (or moment arm) from the load to the axis of the spring body. Usually expressed in inch-oz., inch-pounds or in foot-pounds.
twisting Spring subjected mainly to a twisting moment, in the narrow, sense, helical torsion spring. (torsion)
Total number of coils (N)
Number of active coils (n) plus the coils forming the ends.
Variable Rate Spring
Spring the deflection of which is not linear to the load applied.
Waved Spring Washer
Spring washer made by turning wire and formed into a waved shape.
Spring washer made of thin ring plate on which waving is formed. (curved washer)
Various shapes of springs made of wire, as called by its material.