P4 Precision 7909AC Angular Contact Bearing 45x68x12mm

The 7909AC P4 is a high-precision, 25° angular contact ball bearing with a 45mm bore. Engineered for superior performance, it serves as a critical component in machine tool spindles and other precision rotary systems where high-speed operation, exceptional rigidity, and minimal runout are required.

Key Features

P4 Ultra-Precision

Minimal noise and vibration for smooth, quiet operation.

Exceptional rotational accuracy for superior part roundness and surface finish.

Reduced friction and heat generation for enhanced thermal stability.

25° Contact Angle (AC)

Balanced capacity for both axial and radial loads.

Optimized for high-speed applications.

High system rigidity under preload to minimize deflection.

Compact Lightweight Series

Space-saving design for compact spindle layouts.

Higher maximum speed due to smaller, lighter rolling elements.

Custom logos and packaging are available.

Hangzhou Changer Bearing Co., Ltd.

Established in 2013, is a professional supplier engaged in the research, development, sale and service of ball bearings, needle roller bearing, linear bearing, pillow block bearing, plastic bearing, ceramic bearing, bushing, pulley, gear motors, power transmission. We are located in Hangzhou City with convenient transportation access, near Shanghai and Ningbo seaport.

Under strict quality control of ISO9001 system, our experienced staff can discuss your requirement in details and make you satisfied. Our products are also obtained CE, RoHS certificate.

 

Our factory & Quality control

 

Strict Product Quality Inspection

FQC

Accuracy Measuring

Roughness Profile Tester

Automatic image measuring

With 13 years as your bearing manufacturer, we deliver performance guarantees, not just components.

Understanding that true precision goes beyond catalog specifications, our 7909AC P4 offers these distinct advantages:

Material Excellence

Single-quench heat treatment ensures consistent metallurgical structure for long-term stable performance

Electroslag remelted steel balls with oxygen content ≤8 ppm enhance durability in demanding conditions

Precision Manufacturing

Complete inspection documentation provided with every P4-rated bearing

CNC grinding with active wheel dressing achieves raceway surface roughness of Ra ≤ 0.05 μm

Application Engineering

Ready-to-install matched bearing sets with customizable preload settings

Cage material optimization tailored to your specific speed and environmental requirements

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