Die Spring | Heavy load | 31.75×152.4mm | Raymond NAAMS | AXS-DI-11212

Dimensions

Die springs (DIN & ISO) are arranged in groups according to diameter. Springs with the same mounting dimensions can be selected across different load classes, which increases the durability of stamping, bending and other dies. Each group is arranged by a colour code system in order of increasing load.

Materials & Heat Resistance

Raymond® die springs use chromium alloys optimised for highly dynamic, high-temperature applications. ISO 10243 die springs use high-quality chrome-vanadium steel. Maximum operating temperature is 240°C — the identification colour remains intact at these temperatures. At average material strengths of ~600 N/mm², the force loss at this temperature is approximately 10%.

Maximum Force

Die springs are designed for situations where considerable loads are applied in a very confined space, particularly in the case of press dies. The use of chrome alloys permits maximum loads to be combined with a long service life.

Raymond® and ISO Die Springs

Both types of die spring are produced to the highest quality standard. ISO springs were defined by the ISO standardization organization and are intended for use with stamping and forming dies. Many dimensions of the two series are identical in terms of external measurements; however, the series use different colour coding systems. Note that ISO sets wide tolerances - edge rounding and profile cross-sections can vary significantly, affecting solid lengths. Raymond® products traditionally deliver demonstrably long service life due to consistently high quality.

Colour Code Differences

Colour codes differ between Raymond® and ISO 10243:

ISO 10243 — Compression Guidelines

The solid length (Ln) is where maximum forces are achieved. For frequencies greater than 1000 strokes/minute, the following maximum compressions apply for springs under the ISO 10243 Standard:

🟢 Green: 25–30% compression 🔵 Blue: 20–25% compression 🔴 Red: 15–20% compression 🟡 Yellow: max. 15% compression