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

Extension

Material

Music Wire

Outside Diameter

1

Wire Diameter

0.135

Free Length

5.000

Max. Load

81.7

Max. Extension

7.4

Initial Tension

11.5

Spring Rate

29.20

Max. Load (SS)

71.200

Max. Extension (SS)

7.41

Initial Tension (SS)

10

Spring Rate (SS)

25.4