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Custom Telescopic Spring Manufacturer | Conical & Pagoda Spring Supplier
Custom Telescopic Spring – Conical Helical Spring for Heavy Duty Applications
We manufacture custom telescopic springs (also known as conical helical springs, pagoda springs, tapered coil springs, or cone shaped compression springs) for garage door systems, heavy machinery, railway buffers, and industrial equipment. Made from 60Si2Mn spring steel – a high-strength silicon-manganese alloy known for excellent fatigue resistance and load capacity.
Every spring is tailor made to your specifications: wire diameter, outer diameter, height, coil pitch, and number of active coils.
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What Is a Telescopic Spring?
A telescopic spring (also called conical helical spring, pagoda spring, or tapered coil spring) is a compression spring with a decreasing coil diameter from bottom to top – forming a cone or pagoda shape. It is called "telescopic" because it compresses progressively like a telescope, with each coil nesting into the next.
Key characteristics:
Progressive spring rate – Soft initial compression, increasing stiffness as load increases
Space saving design – Can be compressed almost flat, reducing installed height
Telescopic compression – Coils nest into each other like a telescope
Resonance prevention – Variable pitch design avoids harmonic vibration
High load capacity – Handles heavy loads with progressive resistance
Technical Specifications – Fully Customizable
The table below is a reference example based on an actual custom telescopic spring. All parameters can be adjusted to your requirements.
| Parameter | Reference Example | Your custom Requirements |
Spring Type | Telescopic / Conical / Pagoda spring | ✓ As required |
Material | 60Si2Mn spring steel | ✓ 60Si2Mn / 65Mn / SUP6 / Stainless |
Thickness | 6 mm | ✓ As required |
Width | 90 mm | ✓ As required |
Small ID (top) | 32 mm | ✓ As required |
Large OD (bottom) | 92 mm | ✓ As required |
Free Height | 126 mm | ✓ As required |
Solid Height | Compressible almost flat (telescopic) | ✓ As required |
Number of Coils | 5 | ✓ As required |
Surface Finish | Phosphating / Oil coating / Powder coating | ✓ Zinc plated / Black oxide / Custom |
Load Capacity | Custom calculated based on your application | ✓ As required |
Reference Example – Custom Telescopic Spring (60Si2Mn)
Below is a reference example of a telescopic spring we recently manufactured:
| Parameter | Value |
Material | 60Si2Mn spring steel |
Thickness | 6 mm |
Width | 90 mm |
Small ID (top) | 32 mm |
Large OD (bottom) | 92 mm |
Free Height | 126 mm |
Number of Coils | 5 |
Note: This is a reference example only. We can adjust all parameters to meet your specific requirements.
Why Choose 60Si2Mn Spring Steel for Telescopic Springs?
60Si2Mn is a high-performance silicon-manganese spring steel widely used for heavy duty telescopic and conical springs.
| Property | Vaule |
Tensile Strength | 1,300 – 1,600 MPa |
Yield Strength | ≥ 1,175 MPa |
Elongation | ≥ 5% |
Fatigue Life | Excellent under high cycle loading |
Equivalent Grades | AISI 9260 (US) / SUP6 (Japan) / 60SiCr7 (Germany) |
Key advantages:
High fatigue resistance – suitable for millions of cycles
Good hardenability – uniform properties through cross section
Excellent load bearing capacity – ideal for heavy duty telescopic spring applications
Cost effective – good performance to price ratio
Applications – Where Are Telescopic Springs Used?
Our custom telescopic springs (conical / pagoda springs) are trusted in demanding industrial applications:
Heavy Machinery & Construction Equipment
Excavators and loaders – track tensioning, bucket linkages
Crushers and vibrating screens – support springs
Bulldozers and graders – blade control systems
Railway Systems
Train suspension – primary and secondary suspension
Rail fastening systems – elastic rail clips
Coupler buffers – impact absorption (telescopic compression)
Automotive Industry
Heavy truck suspension – progressive rate springs
Construction vehicle seats – driver seat damping
Clutch assemblies – torsional vibration dampers
Industrial Equipment
Vibratory feeders – drive and support springs
Presses and stamping machines – die cushion springs
Valves – safety relief valve springs
Mining & Quarrying
Vibrating screens – screening equipment support
Feeders – vibratory drive springs
Crushers – impact absorption
Why Choose Seme Hardware for Custom Telescopic Springs?
Factory Direct
We are a precision hardware manufacturer based in Dongguan, China. No middlemen – just quality telescopic springs at factory prices.
How to Order Custom Telescopic Springs
Send your specifications – Provide drawing, sample, or parameters (thickness, width, small ID, large OD, free height, active coils, material, quantity)
Receive a quote – We respond within 24 hours with pricing and lead time
Sample approval (recommended) – Sample telescopic springs available for testing and validation
Mass production – Batch production after sample confirmation
Shipping – On time delivery with inspection reports and material certificates
Frequently Asked Questions
1. What is a telescopic spring?
A telescopic spring (also called conical helical spring, pagoda spring, or tapered coil spring) is a compression spring with decreasing coil diameter. It is called "telescopic" because it compresses progressively like a telescope, with each coil nesting into the next.
2. What is the difference between a telescopic spring and a regular compression spring?
A regular compression spring has constant coil diameter. A telescopic/conical spring has decreasing diameter from bottom to top, providing progressive spring rate – soft at first, stiffer as compressed. It also compresses to a much lower solid height.
3. Can you make telescopic springs in custom sizes?
Yes. Based on your requirements – thickness, width, small ID, large OD, free height, active coils – all parameters can be customized.
4. What is the reference example shown on this page?
The reference example is: 60Si2Mn material, thickness 6mm, width 90mm, small ID 32mm, large OD 92mm, free height 126mm, 5 coils. This is just an example – we can adjust all parameters for your specific application.
5. What is 60Si2Mn equivalent to in US or European standards?
60Si2Mn is a Chinese standard silicon-manganese spring steel. Equivalent grades:
US: AISI 9260
Japan: SUP6
Germany: 60SiCr7
We can also supply telescopic springs in stainless steel (301, 304) or other carbon spring steels (65Mn) upon request.
6. What is the minimum order quantity?
We accept small orders. Contact us to discuss your specific needs – we are flexible.
7. How long does production take?
Sample production: 10–15 days
Mass production: 20–30 days depending on quantity
8. Do you offer samples before mass production?
Yes. We strongly recommend sample approval before mass production to validate fit and performance.
9. How do you ship internationally?
By air (DHL, FedEx, UPS) for small quantities or urgent orders. By sea for bulk orders. We handle all export documentation.
10. What surface finishes are available for telescopic springs?
Phosphating (standard), oil coating, zinc plating, black oxide, and powder coating are available.
Dongguan Seme Precision Hardware Co., Ltd.
📧 Email: [email protected]
📞 Phone / WhatsApp / WeChat: +86 186 6511 1545
Send your specs – we reply within 24 hours.
