Associated Spring Raymond 104-628 Die Spring 7 in Red

Product Description

The ASSOCIATED SPRING RAYMOND 104-628 is a heavy-duty die spring designed for use in stamping dies, press tooling, and industrial machinery applications. It features a 1-1/4 inch hole diameter, a 5/8 inch rod diameter, and a 7 inch free length. The spring is wound from chromium alloy steel wire in a trapezoidal cross-section, which provides a higher load capacity relative to round-wire springs of the same envelope size. With a maximum deflection load of 518 pounds and a spring rate of 210 pounds per inch, the 104-628 is color-coded red to indicate its heavy-load classification. Licensed machinists, tool-and-die makers, and industrial maintenance technicians are the primary installers.

This die spring is suited for high-cycle press tooling in both production stamping and prototype die sets. The red color coding follows the ISO 10243 heavy-load classification standard, making it directly interchangeable with other heavy-duty die springs that conform to that specification. Typical applications include stripper plates, nitrogen-free die cushion systems, and component ejection mechanisms in metal stamping and forming operations. The 5/8 inch rod diameter and 1-1/4 inch hole diameter allow straightforward integration into standard die set bores.

Key Features

• Trapezoidal wire cross-section for higher load density compared to round-wire die springs of equivalent size
• 518 pound maximum deflection load with a 210 pound-per-inch spring rate
• 2.59 inch maximum deflection at full compression
• Chromium alloy steel construction for fatigue resistance in high-cycle applications
• Red color coding per heavy-load die spring classification
• Manufactured under ISO 9001:2008 and ISO/TS 16949:2009 certified quality systems, TUV Rheinland registered

Compatibility

Designed as an OEM-style replacement or direct-fit die spring for standard heavy-load die spring bores requiring a 1-1/4 inch hole diameter, 5/8 inch rod diameter, and 7 inch free length in red heavy-duty classification.

Installation Notes

Installation should be performed by qualified tool-and-die makers or industrial maintenance technicians with the press fully de-energized and locked out per applicable OSHA lockout/tagout procedures. Confirm bore alignment with both the hole diameter and rod diameter before seating the spring to prevent side-loading that accelerates fatigue failure. Never compress the spring beyond its rated maximum deflection of 2.59 inches. Inspect the spring seating surfaces for burrs or misalignment before reassembling the die set.