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What is the difference between Raymond and ISO die springs?

The basic difference is quality.

The Raymond die spring is the "Rolls Royce" of die springs - although the ISO die spring is very good quality.

ISO die springs are manufactured in accordance with ISO 10243.

Raymond die springs are made from chrome-vanadium alloy DIN 17225 (SAE 6150). The spring is then shot peened to improve its fatigue strength and durability.

Use the table below to convert colour codes between the two series:

Grouping hardness
Spring constant
ISO
Raymond
Minimun load
Longest travel
Die spring - ISO green
Die spring - Raymond blue
Medium load
Medium travel
Die spring - ISO blue
Die spring - Raymond red
High load
Short travel
Die spring - ISO red
Die spring - Raymond bronze
Particularly high load
Shortest travel
Die spring - ISO yellow
Die spring - Raymond green

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