Custom Compression Springs
Built for Load, Life & Batch Consistency
From prototypes to stable mass production — engineered compression springs for real mechanical demands.
If You Are Dealing With Any of These Compression Spring Challenges
Load not matching calculation after assembly
Premature fatigue failure in cyclic use
Spring rate drifting between batches
Assembly force too high / too low
Buckling risk under working height
Space limited, but load requirement high
Previous supplier inconsistent on tolerance
Lead time uncertainty affecting production
What a Compression Spring Actually Does in Your Mechanism
A compression spring resists compressive force, stores energy during compression, and releases it to perform work. But in real applications, the spring's behavior is far more nuanced than simple force calculations suggest.
Custom Compression Springs — Not Catalog Parts
Every spring we produce is engineered to your specific requirements, not pulled from a generic inventory.
Spring Types
Custom Parameters We Control
Compression Spring Types — For Performance, Not Just Shape
Different geometries serve different mechanical purposes. Choose based on your application requirements.
Standard Helical
General Load Applications
Most controllable parameters, predictable performance
Barrel / Convex
High Stability Requirements
Resists lateral deflection, reduces buckling
Hourglass / Concave
High Compression Ratio
Greater stroke in limited space
Conical / Tapered
Space-Constrained Design
Telescopes into itself, minimal solid height
Variable Pitch
Progressive Load Response
Multi-stage spring rate, soft start then firm
Disc / Washer
High Load / High Stiffness
Maximum force output, damping properties
Material Selection Is Where Performance Starts
Choose material based on load, temperature, corrosion, and fatigue requirements.
| Material | Advantages | Limitations | Applications |
|---|---|---|---|
| Music Wire (ASTM A228) | High elasticity, cost-effective | Not corrosion resistant | General machinery |
| Oil Tempered Wire | Good fatigue resistance | Moderate corrosion resistance | Automotive, industrial |
| Stainless Steel (302/304/316) | Excellent corrosion resistance | Lower elasticity | Medical, marine, food |
| Chrome Silicon | High fatigue strength | Higher cost | High-cycle applications |
| Chrome Vanadium | High temperature stability | Premium pricing | Engine, exhaust systems |
| Inconel / High Temp Alloy | Extreme temp resistance | Manufacturing difficulty | Aerospace, turbines |
Why Material Choice Matters
Fatigue Life Under Cyclic Load
Material determines how many cycles before failure
Load Stability Over Time
Prevents set loss and maintains spring rate
Corrosion & Temperature Resistance
Match environment to material properties
Why Two Springs With Same Size Perform Differently
Dimensional specifications alone don't guarantee performance. Spring design involves understanding stress distribution, fatigue behavior, and manufacturing variables.
Spring Index Impact on Stress
The ratio of coil diameter to wire diameter affects stress concentration and fatigue life
Pitch Design Affecting Load Curve
Pitch variations change how force builds through compression stroke
End Grinding for Seating & Load Accuracy
Ground ends ensure perpendicular loading and accurate force transmission
Heat Treatment for Long-Term Stability
Proper stress relief prevents set loss over millions of cycles
Designed for Real Cycles, Not Theoretical Numbers
We design springs based on your actual operating conditions, not just handbook formulas.
Target Load at Working Height
We calculate the exact force your mechanism needs at its operating position
Safety Factor Based on Real Stroke
Stress calculations account for your actual compression range
Fatigue Life Estimation for Your Cycle Count
Whether you need 100K or 10M cycles, we design accordingly
Validation Through Sample Testing
Physical testing confirms theoretical calculations before production
Batch-to-Batch Consistency Is a Manufacturing Issue
We don't just claim tight tolerances — we control every process step to achieve them repeatably.
Controlled Wire Sourcing
Same mill, same heat lot for your production runs
In-Process Load & Length Checks
Real-time monitoring, not just final inspection
Set Removal & Stress Relief
Eliminates initial set loss for stable long-term performance
Sampling Plan for Mass Production
Statistical process control aligned with your QA requirements
From Bar Stock to Batch Stability — Our Factory Process
Every step is controlled for repeatability and documented for traceability.
Material Trace & Prep
Batch recording, chemical & mechanical property verification before production starts
Precision Winding
CNC coiling for repeatability with pitch and spring index control
Stress Relief & Set Removal
Controlled heat treatment to prevent long-term relaxation
Grind & End Processing
Ground ends for load accuracy and proper seating
In-Process QC
Length, OD, spring index verification at each stage
Load & Fatigue Testing
Sample load curve validation and cycle life evaluation
Manufacturing Capability Ranges
Our equipment and processes are optimized for these specification ranges. Projects outside these parameters may require tooling discussion.
| Parameter | Range |
|---|---|
| Wire Diameter | 0.15 – 16.0 mm |
| Outer Diameter | 1.5 – 150.0 mm |
| Free Length | 3.0 – 500.0 mm |
| Load Tolerance | ±5% to ±10% |
| Monthly Capacity | 5,000,000+ pcs |
Different End Types & Grinding Options
End design affects seating, load accuracy, and assembly stability.
Closed & Ground Ends
Maximum stability and load accuracy. Ground flat for perpendicular seating. Best for precision applications.
Closed Ends (Not Ground)
Cost-effective option. Suitable where precise seating is less critical. Good for general industrial use.
Custom End Requirements
Open ends, tangent ends, or special configurations based on your assembly design and loading conditions.
Surface Treatment & Finishing Options
Protect your springs from corrosion and enhance performance with the right surface treatment.
Zinc Plating
General corrosion protection
Black Oxide
Mild protection, aesthetic finish
Passivation
Stainless steel enhancement
Custom Coating
Special requirements on request
Industry Standards & Quality Assurance
We maintain certifications and documentation systems to support your quality requirements.
ISO 9001:2015
Quality management system certification
RoHS / REACH
Environmental compliance for EU markets
Material Test Reports
Mill certificates available per batch
Traceable Batch Cards
Full production history documentation
Typical Applications
Our compression springs serve critical functions across diverse industries.
Industrial Machinery
Automotive
Medical Devices
Electronics
Consumer Products
Engineering Success Stories — Real Performance Gains
See how we've helped clients solve challenging spring performance problems.
Valve Spring Fatigue Life Extension
Client experiencing premature failure at 800K cycles. Redesigned spring index and optimized stress distribution.
Actuator Spring Batch Consistency
Previous supplier delivering ±15% load variance. Implemented controlled wire sourcing and in-process monitoring.
Surgical Device Spring Reliability
Required 500K+ cycle life in corrosive sterilization environment. Selected 316 SS with passivation treatment.
Frequently Asked Questions
Engineering and procurement questions we hear most often. Can't find your answer? Contact our team directly.
Installed spring rate is the force at initial assembly position. Working spring rate is the force change per unit deflection during operation. We design for both to ensure proper function throughout your mechanism's stroke.
Through controlled wire sourcing (same mill, same heat lot), CNC coiling with locked parameters, in-process load monitoring, and statistical sampling aligned with your QA requirements.
Wire diameter: 0.15–16mm. Outer diameter: 1.5–150mm. Free length: 3–500mm. Projects outside these ranges require tooling discussion.
Engineering samples: 7–10 days. Pilot batch: 15–20 days. Mass production: 20–30 days depending on quantity. We provide dimensional reports with samples for your validation.
Yes. Mill certificates for raw material, dimensional inspection reports, load test data, and batch traceability cards are available. We can align documentation format with your requirements.
What Helps Us Quote Faster & More Accurately
The more information you provide upfront, the more accurate our engineering assessment and pricing will be.
Information Checklist
Drawing (Preferred)
2D drawing or 3D model with dimensions and tolerances
Or: Basic Parameters
OD, wire diameter, free length, load requirement
Working Conditions
Stroke range and cycle count requirement
Target Quantity
Annual usage or batch size for pricing optimization
Material & Surface Requirements
If specified, or let us recommend based on application
Typical Lead Times
Quote Response
Technical review and pricing with complete information
Engineering Samples
First article for validation testing
Pilot Batch
Small quantity for assembly testing
Mass Production
Full production quantity (varies by volume)
Ready to Get an Accurate Quote?
Upload your drawing or share your specifications. Our engineering team will review and respond within 24-48 hours with technical feedback and pricing.
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