EX Series Heavy-Duty Urethane Pillar Springs (Through Hole)

Urethane pillar springs with a through-hole mount are commonly used to provide controlled cushioning in injection mold tooling, especially where die weight and press-tonnage fluctuations must be absorbed without losing alignment.

• Automotive connector and housing molds: Use the pillar’s through-hole design to locate and stabilize the cushioning element during cyclic closing, helping maintain consistent clamp behavior under heavy load.
• Industrial appliance housings: The hourglass pillar geometry supports stable compression over the working stroke, reducing abrupt load changes that can affect part dimensions.
• High-cavity, heavy die setups: Shore A90 urethane is chosen here to resist deformation under demanding loads, matching applications that require a predictable spring response.

Choose variants that match the needed maximum load (e.g., up to 54,427 N) and required pillar envelope (outer diameter and length) to ensure the die cushioning system performs repeatably across production cycles.

This product uses urethane with Shore A90 hardness. The higher Shore rating is selected for heavy-load cushioning, providing stronger resistance to permanent set and deformation compared with softer urethanes.

• Wear resistance vs. toughness: A90 urethane balances durability under frequent cycling with sufficient elastic recovery for stable compression.
• Heat treatment: The specification provided is urethane hardness; no steel grade, quench, temper, or nitriding details are listed for this component.
• Manufacturing relevance: Urethane pillars are typically molded/formed to an hourglass profile to control compression behavior, then supplied in through-hole configurations for repeatable installation.

If you are comparing alternatives, note that lower Shore urethane generally yields softer response and greater deformation risk under high loads, while A90 targets the “controlled, heavy-load” range.

Select dimensions by matching the spring’s physical envelope and load capacity to the mold die cushioning requirements.

• Match load rating: Verify the required cushioning maximum load and select the variant that fits your target range (available maximum loads include 12,749 N, 18,633 N, 39,227 N, and 54,427 N).
• Match pillar outer diameter (D): Choose the appropriate outer diameter from the available options 50 mm, 60 mm, 80 mm, or 100 mm to fit within the surrounding die structure.
• Match pillar length (L): Use the available lengths 62 mm, 82 mm, 103 mm, or 123 mm to achieve the required working stroke clearance.
• Chamfer option (C1): Configure whether chamfering is No or Yes based on how the component interfaces with adjacent mold features.

Because the through-hole is used for mounting and alignment, confirm that your mold’s locating hardware and hole geometry correspond to the selected through-hole variant to maintain repeatable positioning and compression behavior.