
Cylinder Boring Machine
In the realm of engine reconditioning and high-precision industrial manufacturing, the cylinder boring machine represents the pinnacle of internal diameter accuracy. Our factory in Hangzhou specializes in the production of high-precision boring components and gray iron castings (HT250) that serve as the foundation for these critical machines. For 11 years, we have refined our machining processes to ensure that the boring bars and head assemblies we produce can achieve a positional tolerance of ≤0.01mm. We know that in engine work, even a micron's deviation can lead to improper piston ring sealing or catastrophic engine failure. Our "cylinder boring machine" components are engineered to provide the rigidity and vibration dampening required to achieve a mirror-like finish on cylinder walls.
Our manufacturing process for "cylinder boring machine" parts utilizes a combination of gray iron HT250 for its superior stability and Aluminum A356 for lightweight components. We handle hole diameters ranging from 10mm up to 150mm, with a depth-to-diameter ratio exceeding 5:1. Every component is subjected to rigorous roundness and concentricity checks to ensure it meets the IT6 tolerance grade. By focusing on the "cylinder boring machine" sector, we have developed a unique technical edge in deep-hole machining and high-accuracy boring. Whether you are an industrial equipment manufacturer or a specialized engine shop in Germany or the US, our ISO 9001:2015 certified production ensures that you receive parts that will maintain their accuracy over thousands of hours of operation.

Specifications
|
Hole Diameter Range |
φ10-150mm |
|
Depth-to-Diameter Ratio |
>5:1 |
|
Positional Tolerance |
≤0.01mm |
|
Roundness Achievable |
≤0.003mm |
|
Materials |
Gray iron HT250, Aluminum A356, stainless steel |
|
Certification |
ISO 9001:2015 (Cert No. 19925Q2204R0S) |
|
Standard Lead Time |
~15 days |
Application Areas
Our boring components are used in automotive engine block rebuilding, hydraulic cylinder manufacturing, and the production of precision pump housings. They are also essential in the aerospace and marine sectors for boring out high-tolerance bushings and bearing seats.
Customization Capability
We offer full customization for boring bars and machine components. If you require a specific length, diameter, or specialized tool-holding interface (such as BT40 or HSK), our technical team can provide a design and prototype within days. We can also customize the material grade to provide higher wear resistance for heavy-duty industrial applications.
Packaging & Logistics
Precision boring bars are sensitive to temperature changes and physical impact. We use heavy-duty wooden crates with VCI (Volatile Corrosion Inhibitor) packaging to prevent rust and ensure the components arrive in factory-perfect condition. We offer EXW, FOB, and DDP shipping to accommodate our global client base.
FAQ
Q: How do you ensure the boring bar remains straight over long distances?
A: We use stress-relieved HT250 iron and perform multiple stages of precision grinding and balancing to ensure that even our longest boring bars maintain their centerline accuracy.
Q: Can you manufacture replacement parts for existing boring machines?
A: Yes, if you provide the technical drawings or a sample of the original part, we can manufacture high-precision replacements that often exceed the original OEM specifications.
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