Angular Contact Ball Bearings 7220ACPBCP4

Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of angular contact ball bearings 7220acpbcp4 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.

Angular Contact Ball Bearings-7220ACPBCP4

7220ACPBCP4 is a large-sized precision angular contact ball bearing:

7220: Size series, bore diameter 100 mm, outer diameter 180 mm, width 34 mm, heavy-duty large-size precision angular contact bearing

AC: 25° standard contact angle, balanced performance for both radial and axial loads

PBC: Code for four-bearing combined arrangement (industry-standard four-piece assembly: Back-to-back + Tandem combination, also named QBC/PBC)

P4: Ultra-precision tolerance grade, the most widely adopted high precision grade for machine tool spindles

1. Structure Definition of PBC

PBC refers to a factory preloaded integrated set of five angular contact ball bearings, arranged in back-to-back combined with tandem layout (<<>>>). Before delivery, manufacturers precisely grind bearing end faces, uniformly select internal clearance and preload levels (light / medium / heavy preload optional). No manual shim adjustment is needed during on-site assembly; locking the assembly directly achieves the designated preload value.

2. Eight Key Merits of PBC Five-Bearing Matching (Top Choice for PV Slicing & Heavy-Duty Spindles)

(1) Maximized radial & axial rigidity, outstanding resistance to overturning moment Back-to-back layout features the longest load action distance, delivering far stronger anti-overturning capacity than face-to-face (DF) arrangement. The stacked five-bearing structure provides much higher rigidity than dual-set or four-set assemblies, minimizing spindle deflection during cutting and ensuring superior cut surface flatness, which eliminates vibration defects in silicon wafer slicing.

(2) Stable bearing capacity for bidirectional alternating axial loads (mandatory for reciprocating cutting) Reciprocating feeding and cutting movements produce reversible axial thrust. Dual or four-bearing sets have limited load margin, while the PBC five-bearing unit steadily bears alternating axial forces in both directions without axial play inside the spindle.

(3) Standard factory preloading, easy assembly & consistent precision in mass production Internal clearance and preload are uniformly calibrated before shipment. Assembly workers do not need manual lapping and shimming to adjust preload force. All finished spindles maintain identical precision with much lower failure rates, suitable for mass equipment manufacturing.

(4) Controlled temperature rise at continuous high speed, no seizure risk When the spindle thermally expands during high-speed rotation, the internal clearance of back-to-back layout increases slightly, which moderately reduces preload and avoids bearing seizure caused by thermal extrusion. Under 24/7 continuous high-speed PV cutting conditions, its thermal stability greatly outperforms DF arrangement (DF suffers clearance shrinkage and seizure easily under heat).

(5) Even load distribution, drastically extended service life Five bearings jointly share radial loads, axial loads and instantaneous impact forces, lowering stress on each individual bearing. Silicon wafer slicing is a long-term cyclic fatigue load application; the service life of PBC five-set bearings is over 75% longer than four-set assemblies, cutting downtime and bearing replacement costs greatly.

(6) Durable rotational accuracy with negligible precision degradation Combined with P4 ultra-precision grade and original factory matched assembly, tolerance deviations of inner and outer rings are mutually compensated. Radial runout and axial end play of the spindle stay within micron ranges permanently, enabling precise control of silicon wafer thickness tolerance, a critical requirement for PV slicing machinery.

(7) Excellent impact resistance with abundant load margin Instant impact loads occur when cutting through hard spots or impurities inside silicon materials. The extra load reserve of five bearings effectively prevents early failures such as rolling element indentation, raceway pitting and spalling.

(8) Balanced speed & load capacity, ideal for medium-to-high continuous rotation The 25° AC contact angle will not severely limit maximum rotational speed like large contact angle bearings, while offering higher axial load capacity than 15° small contact angle bearings. It perfectly fits the standard working speed range of photovoltaic cutting spindles.

 Comparative Advantages Between PBC Five-Set and Other Common Bearing Arrangements

1. Heavy-duty Precision CNC Machine Tool Spindles (Primary Application)

Vertical machining centers, CNC lathes, cylindrical & surface grinders, boring machines, heavy gantry milling spindles. Large spindles adopt this bearing to withstand overturning torque and bidirectional alternating axial cutting forces generated during machining. Its 7220 dimension perfectly matches the supporting structure of heavy-duty main transmission shafts.

2. Photovoltaic Silicon Wafer Cutting Equipment (Ideal for PV Panel & Silicon Ingot Cutting Spindles)

✅ Fully compatible with PV multi-wire silicon slicers, silicon rod cutting spindles, electric spindles for photovoltaic plate cutting The operating conditions of PV slicing perfectly match the bearing characteristics:

Reciprocating cutting generates continuous alternating axial tension and radial cutting loads;

Long-term high-speed operation with ultra-low vibration is required to guarantee uniform wafer thickness and prevent edge chipping;

Fluctuating cutting loads demand ultra-high rigidity to suppress vibration; P4 micron-level rotational accuracy can be maintained steadily for long hours. Besides, it is also extensively used in PV vacuum pumps, rotary indexing tables and silicon material grinding machines across the photovoltaic industry.

3. Other Heavy Industry & Precision Equipment

End support units for heavy ball screws on large CNC equipment

High-speed centrifugal machines, industrial vacuum pumps, screw air compressor spindles

Small wind power speed increasers, metallurgical roller shafts, precision glass cutting spindles

Precision rotary tables, heavy-duty industrial robot joints, high-speed gearbox output shafts

HXB has a comprehensive laboratory (including durability, physical and chemical, high and low temperature cycle, enamel-wire laboratory, performance, gear, magnetic observation room), with dozens of various equipment and instruments, with the ability to test and verify the performance of new products and components such as magneto, starter motor, generator electronic products. We will support you in selecting the best spindle bearings for your application.

• Deep groove ball bearings: 34 production lines, 30,000,000pcs per year
• Angular contact ball bearings: 14 production lines, 3,000,000pcs per year

Established in May 1995, Hangzhou Huaxing Kechuang Holding Group (HXB, formerly known as Hangzhou Huaxing Bearing Co.,Ltd) is a professional technology enterprise integrating R&D, production and sales. Over 30 years of development, we run two major manufacturing bases: Hangzhou Yijia Precision Bearing Co.Ltd. and Zhejiang Ruiyang Bearing Technology Co.,Ltd.

HXB focuses on high-end bearings such as high-precision angular contact ball bearings, deep groove ball bearings and NEV bearings. Our products widely applied in intelligent manufacturing, 3C industry, CNC centers, precision machinery, robots, aerospace, motors and household appliances.

We uphold rigorous craftsmanship and innovative development, committed to delivering superior angular contact bearing solutions and creating long-term value for global partners.

∗ 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
• Equipment Investment: Over RMB 3 million in world-leading precision testing instruments
• Digital Transformation: with full deployment of MESYS bearing design platform, ERP, MES, WMS, SPC real-time quality monitoring and OA systems, building a benchmark smart manufacturing plant.

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.