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Products
We supply full-category shock absorber components, including pistons, stampings, rubber seals, piston rods, springs, and self-developed banding/grooving machines.
Thin Profile Valve Shim
Thin Profile Valve Shim by XIAYI passes through eight control gates from steel coil to vacuum pack, and double-side grinding holds thickness to 0.01 mm across the whole batch. As your supplier we prove it with laser gauge data, so twenty thousand shims behave like one.
A thin valve shim is easy to make and hard to make the same twice. The Thin Profile Valve Shim is produced under a complete 8-step control plan that follows every piece from raw steel to vacuum-sealed packaging, holding thickness to ±0.01 mm with double-side grinding and finishing every edge burr-free. That is what keeps a 20,000-piece order behaving like one shim, not twenty thousand slightly different ones.
Eight Steps, Eight Control Gates
| Process | Control Item | Control Standard | Monitoring Method |
|---|---|---|---|
| 1. Incoming inspection (IQC) | Material, hardness, thickness | OE standard | Hardness tester, micrometer |
| 2. Precision blanking | ID, OD, verticality, burr | ID ±0.01 mm, burr-free | Optical tester, gauge |
| 3. Vacuum heat treatment | Hardness, stability, stress | HRC 42–48 | Hardness tester, furnace log |
| 4. Double-side fine grinding | Thickness, parallelism, flatness | Thickness ±0.01 mm | Laser thickness gauge |
| 5. Mirror polishing & deburring | Roughness, edge R-angle | Mirror-grade finish, rounded edge R | Roughness tester, microscope |
| 6. Full dimensional inspection | ID, OD, thickness, flatness | Drawing tolerance | 2D vision tester |
| 7. Ultra-clean cleaning | Cleanliness, no oil | Dust-free | Visual + white light check |
| 8. Vacuum packaging & FQC | Appearance, dimension, package | Zero defect | Full inspection station |
±0.01 mm
Thickness, laser-gauge controlled
8 gates
IQC to FQC, full traceability
100%
Full dimensional inspection
The Machines Behind the Microns
| Process | Equipment | Core Capability |
|---|---|---|
| Stamping | High-speed precision press + tungsten carbide die | Stable ID/OD, ultra-long tool life, low burr |
| Heat treatment | Vacuum heat treatment furnace | Uniform hardness, no deformation |
| Thickness grinding | Double-side grinder | Consistent thickness across the batch |
| Polishing | High-precision mirror polishing machine | Smooth surface & rounded edge |
| Cleaning | Automatic ultrasonic cleaning line | Super clean, oil-free for assembly |
Pain Points Traced Back to Process Failures
| Customer Pain Point | Process Failure | XIAYI Control Improvement |
|---|---|---|
| Unstable damping & harsh ride | Uneven thickness & flatness | Double-side grinding + laser gauge |
| Fast damping fade | Unstable heat treatment | Vacuum furnace + hardness check |
| Valve crack & chipping | High internal stress | Stress relief + edge optimization |
| Left/right shock mismatch | Batch dimension variation | SPC + 100% full inspection |
FAQ
Q: How thin can you go while keeping tolerance?
A: Thin secondary shims are exactly what this line was built for — double-side grinding and laser thickness gauging hold the ±0.01 mm window across the range. Send your target thickness for confirmation.
Q: How do you guarantee batch-to-batch consistency on large orders?
A: Fixed tooling (tungsten carbide dies), furnace logs, SPC charts and 100% final inspection — every batch is traceable back to its process records, so batch 10 matches batch 1.
Q: How are the shims packed to survive sea freight?
A: Dust-free ultrasonic cleaning, anti-rust treatment and vacuum-sealed packaging per batch, with final inspection done after sealing.
Request a thickness-tolerance sample for your valve line
Ningbo XiaYi Electromechanical Tech Co., Ltd. runs the full 8-step control plan in-house. Send your ID/OD and thickness spec for a sample with inspection reports.
About XIAYI traceability: every Thin Profile shim batch carries its own IQC record, furnace log, grinding data and FQC result — if a question ever arises about a shipment, we can show exactly how that batch was made, step by step.
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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Email
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.
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