Angular Contact Thrust Ball Bearing 40TAC72B

Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of angular contact thrust ball bearing 40tac72b 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 Thrust Ball Bearing-40TAC72BDGG

Why Ball Screw Support Bearings Adopt 60° Contact Angle

1. Optimized for Axial-Dominant Load Conditions

Ball screw operations are driven primarily by axial thrust, with radial loads accounting for only a small portion. The 60° steep contact angle directs the rolling element load vector mainly along the axial direction. Compared with standard angular contact ball bearings (15°/25°/30°), it delivers significantly higher axial load capacity, capable of withstanding both continuous axial thrust and instantaneous impact forces during screw feed motion.

2. Delivers High Axial Rigidity

A larger contact angle translates directly to greater axial stiffness. The 60° design provides exceptional resistance to axial deformation under preload, effectively suppressing axial play of the screw shaft. This ensures micron-level positioning accuracy and repeatability - critical performance requirements for CNC machine tools and precision transmission systems.

3. Maintains Necessary Radial Support Capability

Unlike pure thrust bearings (90° contact angle with negligible radial capacity), the 60° configuration retains substantial radial stiffness. It can sustain combined loads simultaneously, accommodating minor radial forces during screw operation and simplifying the overall spindle support structure.

4. Balanced Trade-off Between Speed and Positioning Performance

Sixty degrees represents the optimal compromise between axial rigidity and rotational speed capability. A steeper angle (70°/90°) would dramatically increase centrifugal force and reduce speed limits; a shallower angle (30°/40°) would compromise axial stiffness and fail to meet precision feed requirements.

Quick Comparison

表格

In short, the 60° contact angle is purpose-engineered for the unique ball screw operating profile - axial-dominant loads, high-precision positioning, and balanced speed performance.

• 60° Large Contact Angle Design – Specially engineered for ball screw applications, providing extreme axial thrust capacity and stable radial performance for heavy-load precision transmission.
• Ultra-High Rigidity & Zero-Clearance Preload Performance – Supports DB/DF/DT duplex mounting with precise preload elimination, minimizing micro-deformation and ensuring ultra-precise axial positioning.
• Excellent High-Speed Dynamic Stability – Adopts super-finished mirror raceways and low-friction cages, enabling smooth high-speed operation, fast acceleration and responsive feed movement without jitter.
• Super-Precision Tolerance & Ultra-Low Vibration – Manufactured under P2/PN7C precision standards with 100% full vibration inspection, delivering ultra-quiet, resonance-free running for high-end machines.
• Balanced Axial & Radial Load Capacity – Optimized structure combines dominant thrust resistance and auxiliary radial rigidity, adapting to complex alternating load working conditions.
• Durable Sealing & Maintenance-Free Performance – Optional triple-lip sealed structure blocks coolant and dust, matched with long-life high-temperature grease to realize grease-for-life operation.
• Superior Material & Fatigue Resistance – Made of high-purity vacuum-degassed bearing steel with stable heat treatment, greatly improving wear resistance and overall service life.
• Flexible Combination & Easy Assembly – Supports single or 2–4 sets combined installation, perfectly compatible with cylindrical roller bearings to form high-rigidity machine tool spindle systems.

• Thrust angular contact ball screw support bearings are ultra-precision rolling components professionally optimized for high-end ball screw drive systems and high-rigidity spindle units. Featuring superior axial thrust capacity, balanced radial performance, extreme structural rigidity and outstanding high-speed stability, these bearings are widely adopted in precision machine tools, automated linear motion systems, heavy-duty industrial facilities and high-speed vertical equipment. They perform exceptionally well in scenarios requiring rapid acceleration, precise axial positioning, continuous high-speed operation and heavy downward thrust loads.
• Precision Machine Tool Spindle Systems
• Widely applied in high-precision machine tool spindle systems, these bearings are commonly paired with cylindrical roller bearings to form composite high-rigidity support structures. This collaborative combination perfectly complements the strong radial rigidity of cylindrical roller bearings and the extreme axial thrust resistance of 60° angular contact bearings, delivering excellent overall structural stability and running accuracy. Ideal for CNC lathes, milling machines, grinding centers and machining centers, they effectively suppress spindle runout and micro-vibration during high-speed cutting and heavy-load processing, ensuring stable, consistent and high-precision machining results for long-term industrial production.
• High-Precision Ball Screw Drive Mechanisms
• Specially designed for precision ball screw transmission, this bearing series serves as the optimal supporting solution for high-precision linear motion systems. With structurally enhanced axial load capacity and precisely controlled radial performance, the bearings support steady high-speed operation, instant rapid acceleration/deceleration and ultra-precise axial positioning. They eliminate transmission jitter and positioning errors during reciprocating screw movement, enabling smooth, sensitive and repeatable linear feed motion. They are extensively used in CNC feed axes, precision linear modules, automated sliding platforms and robot linear transmission systems, guaranteeing micron-level positioning accuracy and long-term operational stability.

• Delivers high rigidity and precise axial positioning
• Supports high speeds and rapid acceleration cycles
• Low friction for smooth, efficient operation
• Compatible with cylindrical roller bearings for combined load support

∗ 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

1. Hangzhou Factory - YJB

Established in June 2007, Hangzhou Yijia Precision Bearing (YJB) is a core subsidiary of HXB Group, certified as both a national high-tech enterprise and Zhejiang provincial science and technology enterprise. Focused on the independent R&D and intelligent manufacturing of ultra-precision, high-speed and customized special bearings, YJB serves high-end precision transmission scenarios for industrial and precision equipment worldwide.

• Product Size: Inner diameter Φ5–Φ300mm
• Precision Classes: P2, P4, P5, P6

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.