Ceramic Angular Contact Ball Bearings HCB708-C-2RSD-T-P4S

Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of ceramic angular contact ball bearings hcb708-c-2rsd-t-p4s in China. As we have world-leading production equipment and strong manufacturing capabilities, we warmly welcome you to buy bulk high quality bearings at competitive price from our factory.

Ceramic Angular Contact Ball Bearings-HCB708-C-2RSD-T-P4S

🏭 High-Speed CNC Machine Tool Spindles

This is the most common use case. The hybrid ceramic design (silicon nitride balls with steel rings) allows for extremely high rotational speeds with minimal heat generation and vibration. It's perfect for milling and turning centers that demand superior surface finish and dimensional accuracy.

⚙️ Precision Grinders & Motorized Spindles

For ultra-precision grinding where radial runout must be kept within microns, the P4S tolerance class and UL (universal) preload configuration provide the necessary rigidity and stability. It's widely used in internal, external, and surface grinding machines.

🖥️ High-Speed Engraving & PCB Drilling Machines

Due to its compact size (40mm bore) and ability to handle high RPMs, this bearing is ideal for driving small-diameter cutting tools. It's a standard choice in the electronics manufacturing industry for drilling printed circuit boards and in mold engraving applications.

🦷 Dental Equipment & Medical Instruments

High-speed dental handpieces and certain medical centrifuges rely on these bearings for their low noise, high speed, and smooth operation. The ceramic balls also offer excellent corrosion resistance and electrical insulation, which is beneficial in medical environments.

🚗 Turbocharger Rotor Supports

In some high-performance automotive or aerospace applications, this type of hybrid ceramic bearing is used to support turbocharger shafts. It can withstand the extreme speeds and temperatures found in turbine systems, though this is a more specialized application compared to machine tools.

• Cleanliness is Critical

Contamination Control: Install in a clean, dust-free environment. Even microscopic particles can cause brinelling or raceway damage in P4S bearings.

Do Not Wash: These bearings are typically supplied with factory grease and sealed (2RSD). Never wash, degrease, or spin them dry, as this will remove the lubricant and damage the seals.

• Temperature & Thermal Expansion

Controlled Heating: If an interference fit is required for the inner ring, heat the bearing to a maximum of 80°C (176°F) using an induction heater or oil bath.

Avoid Direct Flame: Never use an open flame or excessive heat, as this will permanently damage the grease, seals, and the ceramic balls' structural integrity.

Thermal Runaway Prevention: Ensure the housing and shaft are machined to the correct tolerances to allow for thermal expansion during high-speed operation.

•  Installation Technique

Uniform Force: Apply mounting force only to the ring being press-fitted (e.g., press on the inner ring if fitting onto the shaft). Never transmit force through the rolling elements or seals.

Avoid Impact: Do not use hammers or punches. Use a hydraulic press or a proper mounting sleeve to apply smooth, even pressure.

Seal Protection: Take extreme care not to damage the 2RSD contact seals during installation, as seal damage will lead to grease leakage and contamination ingress.

• Lubrication & Preload

Factory Grease: The "2RSD" designation means it is pre-lubricated and sealed. Do not add additional grease, as over-lubrication causes churning, excessive heat, and seal failure.

UL Preload Matching: The "UL" suffix indicates a universal preload pair. Ensure that bearings are installed in matched pairs or sets as specified. Mixing UL bearings with other preload classes (e.g., L or M) will result in incorrect preload, leading to overheating or loss of rigidity.

Break-in Period: After installation, run the spindle at low speed initially to allow the grease to distribute evenly before ramping up to full operating speed.

∗ 30 years of dedicated development

HXB was founded in 1995, with nearly 30 years of dedicated development, HXB now operates6 subsidiaries.

 

∗ 2 high-tech R&D centers

∗ 2 modern manufacturing factories - Hangzhou Yijia Precision Bearing Co., Ltd. and Zhejiang Ruiyang Bearing Technology Co., Ltd.

∗ Supported by advanced digital MES and SPC management systems

∗ IATF16949:2016, ISO9001:2015 and ISO14001 certifications

∗ High-end equipment and high-quality material

1. Hangzhou Factory - YJB

Founded in June 2007, YJB is located in Hangzhou. As a subsidiary of HXB Group, we are a national high-tech enterprise and provincial science & technology enterprise specializing in R&D and manufacturing of high-precision, high-speed, advanced, special and professional bearings.

Core Capabilities & Intelligent Manufacturing

• Product Size: Inner diameter Φ3–Φ300mm
• Precision Classes: P2, P4 (ultra-precision grades)
• Annual Capacity: 3 million sets of precision bearings in a lean & intelligent factory

2. Huzhou Factory

In 2021, the deep groove ball bearing factory relocated from Hangzhou to Huzhou. It operate in a 10,000㎡ production facility with a team of 75 employees, focused on the R&D, and manufacturing of high-performance deep groove ball bearings.

We maintain a professional engineering and quality system to ensure stable precision and reliability.

Engineering Team: 4 bearing design & process engineers, accounting for 5% of staff.

Quality Team: 15 quality personnel, including 2 quality engineers, 20% of staff, covering incoming inspection, in-process control and final testing.