Product OverviewHigh Precision Shock Valve Shim for Consistent Damping Performance
XIAYI's shock absorber valve shim is precision-engineered with
micron-level dimensional tolerances. This stamped metal washer
serves as a critical flow control element within shock absorber
valving systems, precisely metering hydraulic oil passage to
deliver consistent, tunable damping performance across the full
range of operating conditions.
Manufactured under strict process controls with advanced metrology
verification, each shim delivers the exact thickness and flatness
required for predictable damping curves. This precision enables
shock absorber manufacturers to achieve tight performance windows
without selective assembly.
Technical Specifications| Features |
| Materail | SK4,SK5,65MN,CK101,C100S,SUS,20C,etc |
| Thickness | 0.1mm-3.5mm |
| Availability | OEM,ODM |
| Moulds | More than 3500 |
| Certification | IATF16949:2016 |
| Application | Shock absorber, electronic products,mechinery,compressor,etc |
Product Description
Description:
Our company produces different kinds of stamping parts shim and
gasket, powder metallurgy products and other shock absorber parts.
These products can be used in different areas of shock absorbers,
to adjust and control the oil flow.
Dry working condition, provides maintenance free operation.
Can be applied in widely temperature -200 to +600
Suitable for high static and dynamic load
With low and smoothly coefficient of friction and without
stick-slip effects
Suitable for dirt, impact and edge load
Good thermal conductivity property
With lower wear rate and long life service
Equipment Advantages: We are specializing in the production of
Powdered Metal/Sintered Parts. We have automatic Hydraulic
Machines, Automatic Mechanical Pressers, Vacuum Furnaces, Sintering
furnace, CNC Tooling Machine, etc.
Scientific Research: with powerful technologies and development,
focusing on product R&D and marketing. We are serving various
industries at a pace of producing a number of new items each year.
Preponderant Products:
1. Various kinds of Powdered Metal: Power Tools Parts, Automobile
Parts, Automobile Rotors, Motorcycle Parts, Engine Parts, Shock
Absorber, Compressor Parts, Sintered Gears, Hydraulic Pressure
Parts, Garden Tool Parts, Home Appliances Parts, Meat Chopper
Parts, Lock Parts, Sewing Machine Parts, Textile Machine Parts
2. Those small, complex and highly technical required sintered
bronze and iron parts.
Quality Inspection: We have advanced management principles, a full
range of testing equipments and professional quality control
process to meet our clients satisfaction. Quality inspection
machine: three- coordinate, optics image instrument, metalloscope,
digital hardness tester, density equipment, tensile testing
machine, etc.
Applications:
1. Automotive Part
2. Motorcycle Part
3. Pump Parts
4. Locomotive Parts
5. Machinery Parts
6. Tool Parts
Competitive Advantage:
High quality guarantee:
(1) Electronic balance ensure density
(2) Test equipments to ensure crushing strength
(3) QC an PQC to ensure close tolerance and accurate dimension
Design ability:
Develop different models of gear, bearing, bushing, structural
parts etc. can produce according to
drawings or samples.
Key Features & Benefits- Precision Thickness: Available from 0.1mm to 3.5mm with tight tolerances for accurate
damping calibration
- Material Options: SK4, SK5, 65MN, CK101, C100S, SUS (stainless steel), 20C and other
grades to match application requirements
- Extensive Mold Library: Over 3,500 existing mold configurations for rapid fulfillment of
common sizes
- IATF 16949:2016 Certified: Full automotive quality management system compliance
- OEM/ODM Capability: Custom dimensions, materials, and surface finishes available
- Wide Temperature Range: Reliable operation from -200°C to +600°C
- Maintenance-Free: Designed for dry working conditions with no lubrication required
- Versatile Application: Suitable for shock absorbers, electronics, machinery, compressors,
and more
Applications- Automotive Passenger car and light truck shock absorbers, strut assemblies,
suspension dampers
- Motorcycle Front fork cartridges, rear shock valving, steering dampers
- Industrial Hydraulic system flow control, compressor valve plates, pump check
valves
- Electronics Precision spring contacts, thermal management shims, sensor
mounting
- General Machinery Spacer washers, thrust washers, spring preload shims, alignment
shims
Why Choose XIAYI? With over 3,500 mold configurations, IATF 16949:2016
certification, and decades of precision stamping expertise, XIAYI
delivers valve shims that meet the most demanding automotive
suspension requirements. Our integrated approach — from material
selection and tooling design to precision stamping/fine blanking
and comprehensive quality inspection — ensures consistent quality,
competitive pricing, and reliable delivery for OEM and aftermarket
customers worldwide.
Frequently Asked QuestionsWhat is the function of a valve shim in a shock absorber?
Valve shims (also called valve discs or spring washers) are thin,
precision-stamped metal discs that form the valving stack inside a
shock absorber. They flex under hydraulic pressure to control oil
flow between chambers, directly determining the damping force
characteristics. By stacking shims of different thicknesses and
diameters, manufacturers can tune compression and rebound damping
curves precisely.
What materials are available for valve shims?
XIAYI offers SK4 and SK5 carbon tool steels, 65MN spring steel,
CK101/C100S high-carbon steels, SUS stainless steel grades, and 20C
low-carbon steel. Material selection depends on the application's
requirements for strength, fatigue life, corrosion resistance, and
cost targets.
What thickness range and tolerances can XIAYI achieve?
XIAYI manufactures valve shims from 0.1mm to 3.5mm thickness (up to
10mm for certain configurations) with precision tolerances. Our
laser measurement systems and statistical process control ensure
consistent thickness across production batches for predictable
damping performance.
What is the difference between stamping and fine blanking for valve
shims?
Conventional stamping cuts material by fracture, leaving rough
edges with burrs. Fine blanking uses a triple-action press to
produce fully sheared, smooth edges with minimal rollover and no
burrs — critical for preventing stress risers and ensuring
consistent oil flow patterns.
What is the minimum order quantity (MOQ) for custom valve shims?
MOQ varies based on specifications. With over 3,500 existing mold
configurations, common sizes can be produced with minimal setup.
For new custom designs, our engineering team provides a quotation
including tooling development timeline and per-piece pricing.
What quality certifications does XIAYI hold?
XIAYI is IATF 16949:2016 and ISO 9001:2008 certified. We provide
material certifications, dimensional inspection reports, hardness
testing data, and flatness verification. FAIR and PPAP
documentation are available to support OEM qualification
requirements.
How do you ensure consistent flatness across production batches?
Flatness is verified through incoming material inspection,
in-process monitoring, post-process laser flatness scanning, and
final QC sampling. Shims not meeting specified flatness tolerance
are rejected. For extremely tight requirements, additional
precision grinding or roller leveling can be incorporated.
Can XIAYI provide custom heat treatment for specific hardness
requirements?
Yes. XIAYI offers quenching and tempering, austempering, and
martempering to achieve specific hardness, toughness, and elastic
properties. Heat treatment is tailored to the material grade and
operating conditions, validated through hardness testing and
metallurgical analysis of each batch.