Selection
Extension Springs are organized in order of increasing diameter and wire size. Note that in each category the spring rate decreases as the length increases.
Unit of Measure

Specifications

Type

N/A Extension

Material

N/A Music Wire

Outside Diameter

N/A 0.063

Wire Diameter

N/A 0.007

Free Length

N/A 0.438

Max. Load

N/A 0.28

Max. Extension

N/A 1.08

Initial Tension

N/A 0.02

Spring Rate

N/A 0.41

Max. Load (SS)

N/A 0.230

Max. Extension (SS)

N/A 1.04

Initial Tension (SS)

N/A 0.02

Spring Rate (SS)

N/A 0.36