Steel Shim Kit China Factory | Types, Material, Craft & Remote Factory Inspection‑Bonpora Parts
Steel Shim Kit China Factory — Types, Material, Craft & Remote Factory Inspection
Sourcing reliable steel shim kit china factory is critical for suspension distributors, damper rebuild workshops, motorcycle racing teams and automotive aftermarket brands worldwide. Bonpora Parts is a specialized Chinese manufacturer of shock absorber valve shim kits. We supply standard‑size shims as well as custom‑tailored shim packs, with transparent production workflows available for remote factory inspection for overseas purchasers. Browse our full shim catalog: https://www.bonporaparts.com/en/shims/
Steel Shim Kit Type
Our steel shim kits are mainly categorized by outer diameter, inner locating dimension and thickness, designed for shock absorber valve stack assembly. Based on our product catalog, ready‑to‑stock shim dimensions cover outer diameters from 9.00 mm up to 16.00 mm, standard inner locating dimension 6.00 mm, with thickness options including 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm and 0.50 mm. Each standard size carries minimum order quantity of 500 pieces.
Standard off‑the‑shelf shim kit: fixed OD × thickness × inner locating size for motorcycle & small‑bore dampers
Mixed‑thickness combination shim kit: pre‑assorted stacks for suspension tuning and damper rebuilding
Custom‑made steel shim kit: tailor‑made outer diameter, inner hole, thickness according to customer drawings or physical samples
Different steel shim kit type matches compression valve, rebound valve and base valve requirements for street bikes, motocross motorcycles and performance automotive dampers.
Steel Shim Kit Material
Performance and service life of suspension shim kits largely depend on steel shim kit material selection. Bonpora adopts high‑grade spring steel imported and domestic steel grades for shim production, strictly controlling non‑metallic inclusion inside raw material coils.
Sandvik 20C: premium spring steel for high‑level motorsport, excellent anti‑fatigue performance under repeated bending cycles
SK4 / SK5: widely‑used spring steel grade, balanced hardness and flatness for general racing and aftermarket dampers
C100S: high‑carbon spring steel for stable valving performance
65Mn: cost‑effective spring steel for mass‑volume aftermarket replacement shim kits
We perform incoming material inspection for every steel coil batch. Raw‑material certification can be provided upon buyer request, to avoid early fatigue fracture, warping and inconsistent damping curves caused by inferior steel.
Steel Shim Kit Craft
Superior steel shim kit craft guarantees tight dimensional tolerance, outstanding flatness, burr‑free edges and stable mechanical property, which directly decides predictable shim‑stack behavior inside shock absorbers.
Raw‑material preparation & incoming inspection: Verify steel grade, coil thickness, surface quality and inclusion index before production.
Precision stamping / blanking: High‑precision progressive die punching to form circular valve‑shim blanks.
Heat‑treatment process: Quenching and tempering for target hardness, improving bending fatigue resistance.
Surface finishing & deburring: Remove micro burrs on inner & outer edges to prevent scratching piston and adjacent shims during operation.
Dimensional & flatness inspection: Check thickness tolerance, outer‑diameter accuracy and flatness for each production batch.
Sorting, counting and packaging: Classify by size and thickness, moisture‑proof packaging for sea‑export logistics.
Every production step keeps traceable quality records. Buyers can review process documents during remote factory inspection sessions.
Steel Shim Kit China Factory Remote Factory Inspection
Many global purchasers cannot travel to China for on‑site supplier vetting. As a professional steel shim kit china factory, Bonpora supports complete remote factory inspection via scheduled live‑video streaming.
Live tour of stamping workshop, heat‑treatment station, QC inspection lab and raw‑material warehouse
On‑camera demonstration of shim‑kit production craft and batch quality‑control procedures
Review of raw‑material certificates, dimension‑testing reports and finished‑goods sampling records
Real‑time Q&A with our production engineers and quality managers
Provide screenshot, screen‑recording and supporting files for buyers’ internal supplier‑approval archives
Remote factory inspection helps overseas buyers verify our real manufacturing capability without expensive international business trips, suitable for pre‑audit before placing mass steel‑shim‑kit orders.
Frequently Asked Questions
What steel shim kit types does Bonpora supply?
We supply standard single‑size shims, pre‑mixed tuning shim kits and fully custom‑made shim packs. Standard sizes follow our online shim product list with MOQ 500 per specification; custom kits are built according to your drawings or original samples.
How do I select suitable steel shim kit material for my dampers?
High‑stress racing scenarios recommend Sandvik 20C. SK4 / SK5 works well for most aftermarket rebuilds. 65Mn is a cost‑efficient choice for large‑volume replacement‑part projects. Our engineering team can give grade suggestions once you share your working‑condition requirements.
How can I arrange remote factory inspection at Bonpora?
Send your time‑zone and available time window to our sales email. We will schedule live‑video meeting, arrange production & QC managers to join, and prepare relevant documents for your virtual audit.
Get Your Steel Shim Kit Quotation & Remote‑Audit Booking
If you plan to source standard or custom steel shim kits from China factory, or want to schedule remote factory inspection, please contact our sales team. Share your required shim‑kit type, target material, dimension specs and order volume.
Email: sales@bonporaparts.com
Visit our shim product page: https://www.bonporaparts.com/en/shims/
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