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The ASSOCIATED SPRING RAYMOND 104-310 is a medium heavy-duty die spring engineered for use in stamping dies, press tooling, and industrial mold assemblies. It features a 0.625-inch hole diameter, a 0.344-inch rod diameter, and a 2.5-inch free length. The trapezoidal wire profile delivers consistent force distribution and extended cycle life under high-load conditions. With a spring rate of 115 pounds per inch and a maximum deflection load of 106.4 pounds at 0.93 inches of travel, this spring is built to perform in demanding production environments. It is installed and serviced by tool-and-die makers, maintenance machinists, and industrial press technicians.
This die spring is suited for residential and industrial press tooling, injection mold assemblies, stamping dies, and jig and fixture applications where controlled return force and precise deflection are required. The red color coding identifies it as a medium heavy-duty grade, making it straightforward to sort and reorder within a tooling inventory. The 0.344-inch rod diameter allows direct mounting on standard guide pins found in common die sets.
Designed as a direct-fit replacement or standard die spring for tooling assemblies requiring a 0.625-inch hole diameter, 0.344-inch rod diameter, and 2.5-inch free length in medium heavy-duty red-grade applications.
Die spring replacement and installation should be performed by qualified tool-and-die technicians or maintenance machinists with the press fully de-energized and ram blocked in the safe position. Inspect guide pins and bores for wear before installing a new spring, as a worn pin can cause premature fatigue. Never compress a die spring beyond its rated maximum deflection of 0.93 inches, as over-compression accelerates fatigue failure. Follow applicable OSHA machine guarding and lockout/tagout procedures during all die maintenance work.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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