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We supply full-category shock absorber components, including pistons, stampings, rubber seals, piston rods, springs, and self-developed banding/grooving machines.
Deep Drawn Metal Spring Seat
Deep Drawn Metal Spring Seat by XIAYI is drawn in one seamless stroke from SPFH540 steel, leaving no weld seam to crack, stick or rust. Formed on precision presses at our Ningbo factory, it holds ±0.02mm coaxiality so every coil spring sits flat, stays quiet and runs its full suspension life.
One-piece deep drawn coil spring seat for shock absorbers — formed in a single continuous stamping cycle for zero weld seams, zero leakage paths and consistent geometry batch after batch.
±0.02mm coaxiality
500hsalt spray test
CPK≥1.67process capability
100%full inspection
Product Overview
The Deep Drawn Metal Spring Seat is a precision coil spring seat manufactured by XIAYI's progressive deep drawing process. Instead of welding or machining a conventional seat from multiple pieces, a high-strength SPFH540 / 22MnB5 steel blank is drawn through a 6-station press into its final cup geometry in one continuous flow. The result is a seamless, weld-free spring seat with uniform wall thickness, no stress concentration at joints, and dimensional repeatability that welded designs cannot reach.
For shock absorber manufacturers, that means fewer fatigue initiation points, no seam corrosion, and a seat that installs with predictable spring alignment over millions of cycles — the reason deep drawn seats are increasingly specified for passenger cars, SUVs and EV suspension programs.
Why deep drawing matters: a one-piece drawn shell eliminates the weld seam that is the most common failure origin on fabricated spring seats — no cracking at joints, no leak path, no batch variation from manual assembly.
Key Features & Engineering Advantages
MATERIAL
SPFH540 / 22MnB5 High-Strength Steel
Coil stock controlled to ±0.1mm thickness and HB210–250 hardness before forming — preventing the material-induced cracking that causes premature seat failure.
FORMING
One-Piece Deep Drawing, ≤0.03mm Flatness
6-station progressive pressing holds flatness within 0.03mm and coaxiality within 0.02mm, so the coil spring seats flat without wobble or eccentric loading.
HEAT TREATMENT
Stress-Relieved, HB220–260
Controlled 810–830°C heat treatment removes forming stress and stabilizes hardness — preventing the residual-stress distortion that appears after months on the vehicle.
CORROSION
20–30μm Coating, ≥500h Salt Spray
Uniform cathodic e-coat applied over the seamless shell — the closed drawn profile leaves no edge crevices for rust to start, outlasting standard 200h finishes.
8-Step Closed-Loop Manufacturing Process
Every deep drawn seat passes through a fully closed-loop production plan. Each step has a defined control value and a specific failure it is designed to prevent:
| Step | Process Control | Failure Prevented |
|---|---|---|
| 1. Raw Material | SPFH540 / 22MnB5, ±0.1mm, HB210–250 | Cracking |
| 2. Blanking | Laser cutting, ±0.1mm, burr-free | Scratch / sticking |
| 3. Deep Drawing & Stamping | ≤0.03mm flatness, ≤0.02mm coaxiality | Wobble |
| 4. Heat Treatment | 810–830°C, HB220–260 | Residual stress |
| 5. Finishing | R2.5 edge rounding, crack-free | Fatigue |
| 6. Coating | 20–30μm, ≥500h salt spray | Rust |
| 7. Inspection | 100% inspection, CPK≥1.67 | Batch variation |
| 8. Packaging | Clean, traceable packing | Transit damage |
Production & Testing Equipment
| Process | Equipment | Control Standard | Value Delivered |
|---|---|---|---|
| Material leveling | KP-160 Leveler | Full flatness | No warp |
| Blanking | LF-3015 Laser | ±0.1mm, burr-free | No burr |
| Deep drawing | CPM-200 6-Station Press | ≤0.03mm flat | No wobble |
| Heat treatment | RW-800 Furnace | HB220–260 | No stress crack |
| Dimension check | Vision measuring | ±0.008mm, 100% | No drift |
| Coating check | Thickness gauge | ±1μm, 100% | No corrosion |
Common Failures We Eliminate
| Customer Pain Point | Root Cause | XIAYI Deep Drawn Solution |
|---|---|---|
| Seat cracking in service | Weld seam stress concentration | Seamless one-piece drawing — no weld, no crack origin |
| Spring wobble / noise | Poor flatness and coaxiality | 6-station pressing, ≤0.03mm flat / ≤0.02mm coaxial |
| Rust at edges | Thin coating, crevice corrosion | Closed drawn profile + 20–30μm e-coat, 500h salt spray |
| Spring sticking | Blanking burrs | Laser blanking, burr-free edges |
| Batch inconsistency | Manual multi-piece assembly | 100% automated inspection, CPK≥1.67 |
Applications
- Passenger cars and city SUVs
- Electric vehicles (EV) — lightweight, high-frequency suspension
- Commercial vehicles and light trucks
- Off-road and specialty vehicles
OEM drawings and custom geometries are welcome — send your drawing for a tailored quote within 24 hours.
Frequently Asked Questions
What is a deep drawn spring seat?
It is a coil spring seat formed by drawing a flat steel blank through a progressive die into a seamless cup shape. Unlike welded or machined seats, it has no joints, giving higher fatigue life and better corrosion resistance.
What steel grades do you offer?
Standard grades are SPFH540 and 22MnB5 high-strength steel. 42CrMo and corrosion-resistant grades are available for heavy duty or coastal applications.
What is your tolerance capability?
Flatness ≤0.03mm, coaxiality ≤0.02mm, and vision-measured dimensions to ±0.008mm with 100% inspection and CPK≥1.67.
Can you match our existing shock absorber design?
Yes. Share your 2D/3D drawing or a sample — our engineering team returns a DFM review and quotation within 24 hours.
About XIAYI — Your Coil Spring Seat Manufacturer
Ningbo XiaYi Electromechanical Tech Co., Ltd. has focused on stamped shock absorber components since 2006 from its home in Ningbo, Zhejiang — a strategic port city that keeps global shipments fast and predictable. Certified to IATF 16949:2016, the company runs its own laser blanking, progressive pressing and e-coating lines, so every deep drawn seat is formed, coated and inspected under one roof.
- In-house laser blanking and 6-station progressive pressing — forming never outsourced
- Own cathodic e-coat line, so coating quality is controlled, not hoped for
- IATF 16949:2016 certified quality system with defect rate below 0.1%
- Engineering team returns DFM feedback and a tailored quote within 24 hours
Need Deep Drawn Spring Seats for Your Suspension Program?
Send your drawing to sales@xiayiparts.com or call +86-13586885132 — tailored quote within 24 hours. Free samples available.
Hot Tags: Deep Drawn Metal Spring Seat, China, Manufacturer, Supplier, Factory
Send Inquiry
Contact Info
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Address
No.209 Lane 520 Tongning Rd,Qianjiang Street,Jiangbei District, Ningbo City, Zhejiang Province, China
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Tel
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Get a Tailored Quote for Your Shock Absorber Parts
Why Global Buyers Choose Ningbo Xiayi:
✓ IATF 16949 Certified — Defect rate strictly controlled below 0.1%.
✓ Full-Category Supply — Pistons, rods, springs, stampings & rubber parts.
✓ R&D Support — Custom powder metallurgy formulas & 7-10 day rapid prototyping.
✓ Proven Capacity — 50 million core pistons produced annually for global OEMs.
Ready to start? Complete the form below and our engineering team will respond within 24 hours with a custom recommendation.
