Rigorous Quality Testing: High-Performance Bearing Steel Tubes for Bearing Ring Material

Product Introduction

As a specialized manufacturer since 1958, Jiangsu Hongbao Group (Pipe) Co., Ltd. provides premium Bearing Steel Tubes specifically engineered for the production of high-durability bearing rings. Our tubes are designed to meet the extreme fatigue resistance and wear requirements of the global automotive and industrial machinery sectors. By utilizing a "Rigorous Quality Testing" framework—including Eddy Current Detection and Tensile Strength Testing—we ensure that every millimeter of steel meets the "zero-defect" threshold required for high-speed rotational applications.

Technical Specifications

Our bearing steel tubes are produced under a perfect Quality Management System certified by IATF 16949:2016 and ISO 9001:2015.

Core Advantages

High Dimensional Accuracy: Our Automatic High-precise Rolling Mills deliver tight tolerances, ensuring minimal material waste during bearing ring machining.

Exceptional Straightness: Advanced Precision Point Straightening ensures the stability of the tube during high-speed feeding in CNC lathes.

Superior Surface Finish: The RX Gas Protected Bright Annealing process prevents decarburization and oxidation, preserving the integrity of the bearing steel.

Global Compliance: Products are certified by DNV, Lloyd’s, and PED 2014/68 EU, making them suitable for international export to the USA, Europe, and Asia.

Frequently Asked Questions (FAQ)

Q: What is the maximum annual capacity for your bearing tubes? A: We maintain an annual output of 50,000 Metric Tons, ensuring stable supply for large-scale automotive OEM orders.

Q: Which bearing steel grades do you specialize in? A: We primarily manufacture GCr15 and 100Cr6, but we also offer specialized ZT series grades (ZT380 to ZT950) for specific industrial requirements.

Q: How do you verify the internal quality of the tubes? A: Every tube undergoes Rigorous Quality Testing using Eddy Current Detectors to identify subsurface flaws and Hardness Testers to verify uniform material properties.