UDN Type Urethane Pads - Shore A70

These Shore A70 urethane pads are used as low-repulsion cushioning elements in injection mold tooling and peripheral fixtures where a stable, predictable contact pressure is required. Because the UDN-type material helps control bounce and rebound, they suit applications that need repeatable positioning after tool closure or part ejection.

Automotive and electronics connector mold support: Use them under localized stops or pad-mounted supports to absorb small misalignments while maintaining consistent compression during repeated cycles.

Medical device housing fixture damping: They can serve as controlled-damping interfaces for clamps or inspection fixtures, reducing shock loads that may affect delicate surface features.

General jig and die seating: Select the configurable L, A, and B dimensions to fit the available die space, ensuring the pad sits flat and compresses uniformly.

• Low repulsion urethane supports controlled return behavior
• Shore A70 balances softness and dimensional stability under load

This product uses an UDN-type urethane formulation engineered for low repulsion, meaning it provides controlled rebound rather than a high-bounce return. The specified Shore A70 hardness targets a balance between cushioning and dimensional stability when subjected to repeated compression.

• Hardness: Shore A70 (soft, elastomeric response)
• Wear behavior: Urethane supports good damping for contact cycling, with performance dependent on compression level and surface finish of the mating part.
• Toughness trade-off: Softer Shore ratings generally improve cushioning but can increase long-term indentation if the load is excessive or the pad is not evenly supported.

As a urethane elastomer component, it is not supplied as a heat-treated steel tool element; therefore heat-treatment steps (e.g., quench & temper, nitriding) are not part of the material specification for this pad.

To select the correct pad size, match the pad’s Length (L), Width A, and Width B to the available space and the intended contact area in your mold or fixture.

• Length (L): choose from 50, 100, or 300 mm based on how far the cushioning element must span across the contact zone.
• Widths: select A (25 or 50 mm) and B (25 or 50 mm) to fit the die cavity/core opening or mounting pocket.

For stable damping, ensure the pad is supported across its footprint so compression distributes evenly. If the pad is mounted in a recess, design the pocket so the pad does not shift during tool closure; target full surface contact to avoid edge loading.

Configurable vs fixed: L, A, and B are configurable within the provided discrete size options; select the closest fit to the cavity/core geometry to minimize clearance-related misalignment.