72225C Single Row Angular Contact Ball Bearing 125x225x42mm 15° Contact Angle

1. Product Overview

72225C is single row open type angular contact ball bearing with 15° contact angle, standard metric dimension 125mm inner bore × 225mm outer diameter × 42mm width.

Model Code Explanation:

• 72225: Medium light series angular contact ball bearing, matching shaft diameter 125mm
• C: 15° small contact angle design, prioritize high rotating speed performance

Inner ring, outer ring and steel balls adopt high purity GCr15 chrome bearing steel, integral quenching treatment plus ultra-mirror superfinishing raceway surface. Stamped steel cage evenly separates each steel ball, reduce collision noise and centrifugal loss under high speed rotation. Open structure without sealing baffle, support circulating oil cooling lubrication, realize stable ultra-high speed operation. 15° small contact angle features small axial rigidity but excellent high-speed performance, suitable for equipment that runs continuously at high speed with light axial load. It can bear single direction axial load and radial combined load, usually used in pairs or multiple groups for bidirectional axial positioning. Widely applied to large industrial gearboxes, machine tool main spindles, high-speed fans, turbine auxiliary shafts, large centrifugal equipment and all high-speed rotary transmission devices.

2. Technical Specifications

Mounting dimension drawings, gearbox paired installation matching guides and long-cycle high speed rotation durability test reports can be provided on customer request.

3. Core Advantages

1. 15° small C contact angle, smaller rolling friction torque compared to 25°/40° bearings, outstanding high-speed running performance, less heat generation during long-time continuous rotation.
2. Open through-type design without shield or rubber seal, circulating cooling oil can fully circulate inside bearing, rapidly take away friction heat to avoid high-temperature ablation at high speed.
3. Ultra-precision superfinished arc raceway, smooth rolling contact surface, low vibration and low noise, stable operation for high-precision spindle and high-speed transmission equipment.
4. Lightweight stamped steel cage, small centrifugal force at high rotation speed, will not deform under long-term high-speed cycle operation, effectively reduce steel ball impact noise.
5. Standard unified metric interchangeable dimensions, fully compatible with global mainstream 72225C angular contact bearings, direct replacement without modifying gearbox housing and spindle shaft structure.
6. High hardness quenched bearing steel raw material, uniform internal metallographic structure, strong anti-fatigue and anti-spalling performance, extend service life of high-speed rotating equipment.
7. Flexible pairing matching mode, can be installed in DB, DF, DT combined arrangement to meet different bidirectional axial positioning and rigidity requirements of spindles and reducers.
8. Rich customizable options: P4 ultra-high precision grade upgrade, brass solid machined cage, C3 high-temperature enlarged clearance, OEM laser marking on outer ring, neutral export anti-rust carton packaging, high-speed synthetic lubricating oil pre-filling.

4. Application Scenarios

72225C 15° high-speed open angular contact ball bearing is light axial load high-speed rotary spare part matched with 125mm shaft large industrial equipment:

• Large heavy-duty gearbox input/output shaft paired bearing assemblies
• Medium-large CNC machine tool main spindle high-speed support bearing sets
• Industrial large centrifugal fan, turbo blower rotor rotating components
• Small steam turbine, generator auxiliary transmission limit bearings
• Large centrifugal separator, chemical processing high-speed rotary equipment parts
• Printing high-speed roller, metallurgical light load high-speed transmission bearings

Aftermarket interchangeable 72000 series C type 15° high-speed angular contact ball bearing

Low-friction high-speed spindle bearing solution for gearbox manufacturers, CNC machine tool OEM factories and centrifugal equipment bulk maintenance procurement.

5. Why Choose GQZ Bearing

We have 25 years of mature professional manufacturing experience for 72000 series C type 15° high-speed angular contact ball bearings including 72225C gearbox and spindle dedicated models.

Our 72225C bearings adopt unified international industrial standard dimensions, consistent dynamic/static load parameters, GCr15 integral quenching heat treatment and stamped cage precision stamping standards, fully dimensionally interchangeable with mainstream imported brand high-speed angular contact bearings.

Complete OEM & ODM customized service system, supporting cage material switching, multi-precision grade selection, multi-clearance customization and personalized outer ring marking demands.

Strict pre-delivery full quality inspection workflow: GCr15 steel raw material composition and hardness test, steel ball automatic sorting screening, long-cycle uninterrupted high-speed rotation aging test, contact angle precision full batch inspection.

Professional angular contact bearing technical team provides one-to-one radial-single direction axial combined load matching calculation, spindle paired preload tolerance design and circulating oil high-speed lubrication maintenance guidance within 24 working hours.

Standardized large-size precision ball bearing grinding production workshop provides competitive factory direct bulk wholesale price, stable long-term mass supply for global gearbox, machine tool and centrifugal machinery spare parts purchasers.

We specialize in C type small contact angle high-speed angular contact ball bearings, strict arc raceway superfinishing and high-speed dynamic balance quality control, committed to long-term stable win-win cooperation with high-speed precision rotary transmission equipment suppliers.

6. Quality Control

• Raw material chemical composition, hardness and fatigue resistance inspection for GCr15 inner/outer ring and steel ball blanks
• Precision forging & CNC turning forming processing, multiple stress relief tempering cycles, ultra-precision superfinishing grinding for 15° angular contact arc raceway surfaces
• Spherical steel ball high-temperature integral quenching, nano mirror polishing and high-precision automatic sorting production line
• Thin steel cage precision stamping forming process, single bearing internal clearance classification inspection, high-speed anti-wear grease quantitative filling procedure
• Targeted professional performance testing: 72225C long-cycle gearbox continuous high-speed rotation aging test, circulating oil cooling high-temperature durability simulation test, high-speed low-vibration running stability detection
• Comprehensive re-inspection of overall dimensional tolerance, inner bore roundness and outer ring surface smoothness before anti-rust oil coating and export moisture-proof carton packaging.

Each production batch of 72225C bearings undergoes large gearbox long-hour high-speed cycle simulation test to guarantee stable low-heat low-vibration high-speed rotary support performance for 125mm shaft precision transmission systems.

7. Get A Quote Now

If you need 72225C 125x225x42 open 15° high-speed angular contact ball bearings for large gearbox / CNC spindle manufacturing, centrifugal fan high-speed assembly and industrial equipment maintenance bulk matching, send your purchase demand directly.

Complete professional one-stop supporting services after sending inquiry:

• Formal official detailed quotation reply within 24 working hours
• One-to-one radial + single direction light axial combined load matching calculation, spindle DB/DF/DT paired installation and circulating oil cooling lubrication technical support provided by professional angular contact bearing engineers
• Customized bearing upgrade options including solid brass cage modification and P4 ultra-high precision grade production
• Favorable factory direct bulk wholesale price for large quantity single model orders of 72225C

Please provide purchase quantity, actual working conditions (long-time continuous high-speed operation / circulating oil cooling requirement / paired spindle preload assembly demand) to obtain complete official quotation documents.

8. FAQ