High Load Urethane Spring Counterbore Hole Type:USZL,USZLK

Product catalog summary

General Description

The document details urethane springs (USA and USX types) designed for high load applications in press tools. These springs are made from polyester-based cast urethane elastomer, known for heat resistance, repeated compression durability, high impact resilience, weather resistance, and load resistance. They serve as optimal pad pressure sources in press tooling.

Features

Hard and elastic material providing excellent impact resistance and strong spring performance.
Superior oil, weather, and aging resistance, resulting in a long service life.
Easy to perform additional cutting and grinding.
Thick wall round pipe shape for ease of handling.

Physical Properties

Property	Value
Material	Polyester Based
Hardness	Shore A 90° (HRS 45°)
Color	Navy Blue
Tensile Strength	59 MPa
Elongation at 100%	7.53 MPa
Elongation at 300%	15.2 MPa
Elongation	510%
Impact Resilience	28%
Modulus	109 N/mm

Operating Parameters and Limits

Deflection Rate Limit for Operation: 25%
Stroke Per Minute (SPM) Limit: 60 SPM for hd1=40, 40 SPM for hd1=80
Ambient Temperature Limit: 50°C

Dimensional and Component Specifications

The document provides detailed dimensional tables based on diameter (d1) and other parameters (hd1 to hd10) for various components such as guide pins, spacers, shoulder bolts, stepped bushings, retainers, and urethane springs. Recommended bolt sizes range from M8 to M16 depending on spring size.

Shape and machining details include radius specifications for non-machined surfaces and recommendations for single and double stage spring operations.

Product Variants and Catalog Information

Two main types are described: USZL and USZLK (the latter includes a retainer). Catalog numbers, dimensions (length L, height H, diameter d), and applicable bolt sizes are provided with increments of 1 mm for customization.

Load-Deflection Characteristics

Extensive load-deflection diagrams illustrate the performance of various urethane spring models (e.g., USZLK60-50, USZLK70-110, USZLK40-60, USZLK100-80, USZLK90-140). These diagrams show load (kN) versus deflection (mm) at different stroke counts: initial, 10,000, 100,000, and 300,000 strokes, demonstrating durability and load retention over time.

Recommendations and Best Practices

Maintain L/D ratio of 2 or less for optimal spring performance.
Use specified guide pins (e.g., 18 mm for 60, 80, 100 USX types) for proper assembly.
Observe deflection and stroke limits to ensure longevity and avoid premature failure.

Summary

This technical document comprehensively covers the specifications, physical properties, dimensional data, and performance characteristics of high-load urethane springs used in press tools. It emphasizes material advantages, operational limits, and provides detailed guidance for selection, installation, and expected durability, supported by empirical load-deflection data.

Catalog excerpts

High Load Urethane Spring Counterbore Hole Type:USZL,USZLK-1

General Description of Urethane Spring FOR HIGH LOAD Application Example Optimum for pad pressure of press tools Urethane spring USA and USX for press tools use polyester based cast For operation with single stage spring urethane elastomer which is heat resistant. It is excellent in repeated Shoulder Bolt compression. It also has high impact Stepped Bushing resilience, impact resistance, weather resistance and load resistance. It is the source of press tools. Pressure Source Components optimum product for pad pressure Features (1) Since material is hard and elastic, it is excellent in impact resistance and shows a strong performance as a spring. Physical Properties (2) Since it is excellent in oil resistance, weather resistance and aging resistance, the service life is long. (3) Additional cutting and grinding can be made with ease. Physical Property Values Radius (Refer to the radius in the detailed drawing for non-machined surface.) For operation with double stage spring Detailed Drawing of Radius Navy blue Tensile Strength Impact Resilience (4) Shape is a thick wall round pipe and is easy to handle. Polyester Based Application Range Characteristic Value Deflection Rate Limit for Operation SPM Limit for Operation Ambient Temperature Limit for Operation Dimensional table (calculation table based on d1) Urethane Spring

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High Load Urethane Spring Counterbore Hole Type:USZL,USZLK-2

Urethane Spring HIGH LOAD AND COUNTERBORE HOLE TYPE USZL Applicable Bolt Applicable Bolt USZLK(Type with Retainer) USZL USZLK L Increments of 1 mm Pressure Source Components Polyester based, Shore 90

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High Load Urethane Spring Counterbore Hole Type:USZL,USZLK-3

Urethane Spring LOAD - DEFLECTION DIAGRAMS USZLK Load - Deflection Diagram Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Pressure Source Components Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes

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High Load Urethane Spring Counterbore Hole Type:USZL,USZLK-4

Urethane Spring LOAD - DEFLECTION DIAGRAMS USZLK Load - Deflection Diagram Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes Pressure Source Components Initial 10,000 Strokes 100,000 Strokes 300,000 Strokes

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