Shaoyi manufactures custom steel and stainless sleeves, spacers, crush tubes, pivot sleeves and weld-in bungs from DOM tubing, seamless tube, 4130 chromoly and bar stock — via three production routes chosen by your tolerance and volume, under IATF 16949:2016 since 2011.
CERTIFIED
ESTABLISHED
QUOTATION
DESIGN ANALYSIS
We use a variety of quality control methods to ensure that the products we deliver to our customers are of the right size and performance for their needs.
Our unwavering commitment to quality is bolstered by our IATF 16949 certification, ensuring a stringent quality control system throughout every phase of production. This certification is a testament to our meticulous approach, from the initial design to the final product delivery. -IATF16949 Certification
Leveraging top-tier production and inspection equipment, our state-of-the-art, fully automated machinery guarantees product quality with every manufacturing process, ensuring consistency and excellence in every output.
Our team of technical experts, each with over a decade of experience in metal fabrication, forms the backbone of our operations. These elite engineers bring a wealth of knowledge and expertise to every project, ensuring that our products not only meet but exceed industry standards for quality and innovation.
Steel sleeves and tube spacers set spacing, carry clamp load and locate components in bolted and welded joints. The same part is specified as a spacer, crush tube, pivot sleeve or weld-in bung depending on the industry.
We have 13 years of experience in manufacturing automotive metal components and have been certified to the IATF 16949 standard for many years
Our advanced metal processing facilities include state-of-the-art automated tube cutting machines, chamfering machines, and precision CNC lathes enable us to deliver specialized and high-quality metal tube processing services
We provide comprehensive tube customization services, tailoring specifications and varieties to suit your product's application. Our mature processes help you reduce overall costs while ensuring optimal performance
All our metal bushings and core products undergo thorough inspection using our infrared dimension measuring equipment. This ensures that every product meets the precise size requirements of our clients
We deliver more than just parts — we deliver peace of mind. Trusted by 30+ automotive brands worldwide. Partner with a manufacturer who understands your quality, lead time, and budget needs.
Standardized,process-oriented refined production standards efforts to provide you with up to 99.8%qualified string of precision parts
Pre-manufacturing feasibility assessment and optimization
Benchmarking,assembly,and inspection criteriadevelopment foridentification of key dimensions
For DFM and work instructions standard full-sizeinspection proofing process problems
Summarize the proofing problems, close the problerpointsand continuously optimize the productlon process
Determine the correctness of the manufacturing process and that the product meets the customer's specifications and process requirements.
Control of special requirements and processesimplementation of CPK>l.33 for key dimensions
Perform according to AQC standards and requirements
Through precise data monitoring and process optimization, we ensure timely delivery of products.
The capability envelope below covers what Shaoyi runs in-house. Exact figures for your part are confirmed in the free design analysis that accompanies every quotation.
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Bushing types |
Steel sleeve, stepped, metal-sleeved rubber, bronze bearing, control-arm, subframe, sway-bar and shock-absorber bushings |
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Materials |
Low-carbon and alloy steel, stainless steel, bronze, brass; rubber and elastomer inserts on request |
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Size range |
Confirmed per drawing; from small link bushings to large subframe mounts |
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Press-fit tolerance |
IT6–IT7 class, approximately ±0.01–0.05 mm depending on diameter and fit specification |
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Surface finish |
Zinc plating, phosphating, Dacromet, e-coating, black oxide; machined bore finish to drawing |
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Forming processes |
Cold heading, forging, CNC turning and machining, stamping of sleeves |
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Inspection |
CMM dimensional inspection; UT, RT, MT, PT, ET; press-fit and pull-off force testing; 100% QC with report |
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MOQ |
Sample orders and small validation batches accepted; bulk production capability for serial programs |
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Lead time |
Quotation 24 h · technical analysis 12 h · tooling and sampling quoted per part |
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Documentation |
Inspection report, PPAP / DV / PV / OTS packages, material certificates, NDA on request |
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Material |
Strengths |
Best fit |
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Steel |
High load capacity, strong press-fit retention |
Structural chassis and subframe mounts |
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Bronze / brass |
Low friction, good wear behaviour as a bearing surface |
Pivot and rotating joints |
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Stainless steel |
Corrosion resistance in exposed positions |
Underbody and salt-exposed locations |
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Metal-sleeved rubber |
Vibration and noise isolation with controlled compliance |
Control arms, sway bars, shock mounts |
Our engineers ensures maximum productivity and cost efficiency for client projects.
After years of development, the company's welding technology mainly includes gas shielded welding, arc welding, laser welding and kinds of welding technologies, combined with automatic assemble lines, through Ultrasonic Testing (UT), Radiographic Testing(RT), Magnetic particle Testing(MT) Penetrant Testing(PT), Eddy Current Testing(ET), Pull-off force of testing, to achieve high capacity, high quality and safer welding assemblies, we could supply CAE, MOLDING and 24-hour quick quotation to provide customers with better service for chassis stamping parts and machining parts.
We’re Exhibiting at Automechanika Frankfurt 2026 — September 8 | Hall 4.2, Stand M31 — 
EN
