Leaf Springs/Coil Springs: Load Capacity 100-50000 N

Component Specifications

Definition

Leaf springs consist of multiple layers of curved metal strips (leaves) stacked and clamped together, providing progressive stiffness through friction between leaves. Coil springs are helical wound metal wires that compress or extend linearly along their axis, offering consistent spring rates. Both types serve as energy storage devices that deform under load and return to original shape when unloaded, critical for vibration damping, load distribution, and motion control in machinery.

Working Principle

Leaf springs work on the principle of beam bending - each leaf acts as a cantilever beam that deflects under load, with friction between leaves providing damping. Coil springs operate on torsional stress principle - when compressed or extended, the wire twists along its helical path, storing potential energy proportional to displacement according to Hooke's Law (F = kx). Both convert kinetic energy from impacts or vibrations into potential energy, then release it gradually to smooth motion.

Materials

High-carbon steel (SAE 5160, 6150), alloy steel (51CrV4, 60Si2Mn), stainless steel (302, 316), or composite materials for corrosion resistance. Leaf springs typically use 50CrV4 or SUP9 steel with hardness 40-50 HRC. Coil springs commonly use music wire (ASTM A228), oil-tempered wire (ASTM A229), or chrome-silicon alloys (ASTM A401).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Free Length	50-1000 mm
Spring Rate	10-500 N/mm
Fatigue Life	>1,000,000 cycles
Solid Height	20-400 mm
Load Capacity	100-50000 N
Maximum Deflection	30-300 mm
Operating Temperature	-40°C to 120°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 2162, DIN 2095, DIN 2096, ISO 10243, SAE J1123

Parent Products

This component is used in the following industrial products

Base Unit / Drive Unit

The foundational component of a vibratory bowl feeder that houses the electromagnetic drive mechanism and provides structural support.

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Engineering Analysis

Risks & Mitigation

Fatigue failure from cyclic loading
Corrosion in humid environments
Overload causing permanent deformation
Resonance at natural frequency
Installation stress concentrations

FMEA Triads

Trigger: Cyclic stress exceeding fatigue limit
Failure: Crack propagation leading to fracture
Mitigation: Design with adequate safety factor (minimum 1.5), shot peening surface treatment, regular non-destructive testing

Trigger: Corrosive environment without protection
Failure: Reduced cross-section and stress corrosion cracking
Mitigation: Use corrosion-resistant materials, apply protective coatings (zinc plating, powder coating), implement cathodic protection

Trigger: Improper installation alignment
Failure: Premature wear and uneven load distribution
Mitigation: Use alignment fixtures during installation, verify parallelism within 0.5°, follow torque specifications for mounting hardware

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±2% on spring rate, ±1% on free length per ISO 2162 Class 2

Test Method

Static load testing per DIN 2095, fatigue testing per ISO 10243, salt spray testing per ASTM B117 for corrosion resistance

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Leaf Springs/Coil Springs

Manufacturer profiles associated with Leaf Springs/Coil Springs.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between leaf springs and coil springs in industrial applications?

Leaf springs provide progressive stiffness and inherent damping through inter-leaf friction, ideal for heavy loads and rough conditions. Coil springs offer linear spring rates and compact design, better for precise motion control and space-constrained applications.

How do I select the right spring for my machinery?

Consider load requirements (static and dynamic), available space, deflection range, environmental conditions (temperature, corrosion), required spring rate (stiffness), and fatigue life. Consult ISO 2162 and DIN 2095 standards for design parameters.

What maintenance do industrial springs require?

Regular inspection for cracks, corrosion, permanent set, and wear. Lubricate leaf spring interfaces, check mounting hardware torque, and monitor for sagging or reduced performance. Replace when deflection exceeds 10% of original specification.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Leaf Springs/Coil Springs