1. Dedicated Measurement Equipment for Critical Parameters:

• High-precision dynamic radial and axial clearance;
• Precision bearing inner/outer ring rotation accuracy including inner/outer diameters and end vibration (dynamic measurement, conforms to national evaluation standards). Repeat accuracy is within 0.6μm – 1.5μm;
• Precision bearing rigidity (optimizing structures by preloading and then measuring end face convex border). Air shaft loaded, the repeatability is within 1~2μm);
• Matched bearing dynamic and static friction moments (of single bearings). The stability value of the air spindle shaft (support and rotary component) is 0.5mN·m/4h;
• Bearing vibration (acceleration and velocity detection modes, including common frequency, peak value, high, intermediate and low frequency measurement to analyze the bearing’s overall performance);
• Service life (integrates reliability, failure analysis, as well as collecting the temperature and vibrating values).

2. Strict Compliance with World-Class Production Standards:

RHD is in strict compliance with the highest manufacturing standards. All procedural requirements are taken seriously in production,from the initially material selection,through loading, processing, inspection, clearing, assembly and lubrication to the final packaging. To ensure quality finished products, RHD developed specific standards for the dust control, the constant temperature and the stable voltage. No employee is allowed to operate production or inspection equipment until having undergone extensive, rigorous training. Furthermore, RHD has also studied the automated production of NSK and NTN, and spent million dollars on the highly effective automatic equipment to realize standardized production, thus significantly reducing product faults caused by human factors. By taking the advantage of high-tech modern facilities and experienced professional operators, it is ensured that the aerospace and defense bearings series products made by RHD are delivered in a timely manner and will pass our client’s incoming QC inspections without needing further review.

3. Military high carbon chrome bearing steel(ZGCr15):

Since the advent of ZGCr15, it’s the first choice of making military equipment and high grade precision bearings. By adopting the improved electro slag remelting techniques, we can reduce non-metallic inclusions, modify its distribution, split the composition blocks, and thus reduce the adverse effects. During the remelting process, the metal is also further refined, significantly enhancing the steel density, restructuring the crystals and reforming the continuity of carbon composition resulting in a more organized lattice. As the result of strict procedures, the service life and reliability of the material can achieves higher levels than ever before. Produced using argon shielded vacuum-degassed steel techniques, our ZGCr15 (oxygen content below 15×10-6) is of the world’s highest quality, that which is used in aircraft engines. Such highest grade bearing steel is used for RHD’s full range products. Fine material does improve the reliability, precision and durability of our bearings, and fully guarantees the capability and accuracy for military uses.

4. Precision to One Thousandth(10-3)of a MM:

We start with a high standard of discipline from the very beginning, setting us apart from other bearing manufacturers. RHD’s full product range is based on P4/ABEC 7 level precision, even reaching as high as the P2/ABEC 9 standard. Generally speaking, the precision reflects the matches between component’s actual geometric parameters (dimension, shape and position) and the ideal parameters. As a consequence, high-end equipment with a dedicated shaft will require great bearing precision to achieve the best overall performance. For the instance, the maximum tolerance in aerospace applications will not exceed a tenth of the width of a single hair.

5. Excellent Stability and Reliability:

Bearing stability is the capability of bearings to allow/assist the axis in returning to the initial position when there is a deviation caused by external forces. Such specific requirements led to a great challenge for RHD in the stability analysis of military bearings. With continuous research into military product requirements, RHD has amassed considerable experience in structural design, alternate hot-and-cold processing technology, detection methods and precision enhancement techniques. Through the development of orthotropic aircraft engine bearings, we have further mastered bearing internal structuring procedures and have overcome difficulties involved in controlling the deviation of rolling elements within 0.001mm range. Material analysis also helps us to reduce the austenite content of ZGCr15/Cr4Mo4V made components below 3%, thus achieving an impressive level in aerospace and defense bearings’ stability and reliability. Through persistence in innovation and quality control, RHD stands out among thousands of bearing manufacturers. With great confidence, we can guarantee reliable performance on the world’s stage.

6. Superior Rotational Speed:

For a quite a long time, aerospace and defense bearings lacked tolerance for high rotational speed. After several years of continuous research and development, the speed of RHD’s aerospace and defense bearing products has steadily increased to 480,000 RPM, and as high as 500,000 RPM in platform tests. Considering that these bearings operate under high speed and heavy load conditions for extended periods of time, we committed to making our military bearings able to reach 480,000 RPM while maintaining reliability and stability. This series also comes with many outstanding features such as low non-mechanical wear, low consumption, low noise and dedicated self-lubrication. In light of all of their advantages, our bearings are widely used in high-end industries including aviation, ultra-precision component processing, robots, energy, electronics, petroleum and petrochemical industries. We have great confidence that there will be more fascinating prospects in the days to come.

7. Flexible Customization:

Alongside worldwide progressive change, RHD bearing is continuously pursuing trends to meet the needs of existing and emerging markets. By using information provided about shape and specific application, RHD is always able to produce the tailor-made bearings based on the customer’s needs. Complying with P4/ABEC 7 and higher precision, we can ensure the dedicated rotational accuracy, minimum tolerance, optimized structure, efficient heat-dissipation and properly dispersed lubrication. By maintaining focus on attention to detail, we provide considerable flexibility to modify a wide range of bearing features. In accordance with the demands of clients who also make custom equipment and limited production runs, RHD would be pleased to offer our services for the design and manufacture nonstandard bearings in small order quantities.