71914CE/HCP4DBA Super Precision Angular Contact Ball Bearing 70x100x32mm Hybrid Ceramic Back-To-Back P4A Spindle

1. Product Overview

71914CE/HCP4DBA is matched double set super precision thin section angular contact ball bearing, dimension 70×100×32mm. CE stands for 15° contact angle high-speed design; HC means silicon nitride ceramic rolling balls; P4A ultra-high dimensional & running tolerance; DBA represents back-to-back paired arrangement with light preload. Phenolic fabric reinforced resin cage guides rolling elements stably. Hybrid ceramic structure cuts centrifugal force for ultra-high rotating speed, bears combined radial and heavy bidirectional axial loads, widely applied to CNC spindle, precision grinding machine, medical equipment and semiconductor automation.

2. Technical Specifications

Model: 71914CE/HCP4DBA
d:70mm, D:100mm, Total width B:32mm
Contact angle:15°
Min fillet r:1mm
Dynamic load Cr:35.8kN, Static load C0r:32kN
Grease limiting speed:24000r/min
Net weight:0.561kg
Structure: Two single bearings back-to-back DBA matched, open type
Roller: Silicon nitride ceramic balls
Cage: Cotton fabric phenolic resin cage
Ring material: GCr15 vacuum smelting bearing steel, HRC60-65
Precision grade: P4A super precision
Preload class: Light preload
Operating temperature: -30℃ ~ 110℃
Dimension drawings and durability test reports available on request.

3. Core Advantages

• HC hybrid ceramic balls reduce weight and centrifugal force, boost maximum rotating speed greatly
• CE 15° small contact angle optimized for high-speed spindle operation
• P4A ultra-high precision, ultra-low runout for high accuracy machining
• DBA back-to-back pairing provides high axial & radial rigidity, light preload stable performance
• Fabric phenolic resin cage low friction, low noise and stable at ultra-high speed
• Thin wall 719 series compact size saves spindle internal installation space
• Custom preload grade, special high-speed grease and non-standard matching available

4. Application Scenarios

• CNC machining center main spindles, high-speed grinding machine spindles
• Precision medical rotary equipment, dental high-speed handpieces
• Semiconductor wafer processing automation rotating components
• Measuring instruments, optical precision rotating modules

Fit OEM assembly and aftermarket replacement of high-speed ultra-precision rotating equipment.

5. Why Choose GQZ Bearing

25 years professional production of hybrid ceramic super precision spindle bearings. Vacuum smelting high-purity GCr15 steel with stable heat treatment metallurgical structure. Full OEM & ODM customization for preload grade, lubricant and matching arrangement. Strict full-process inspection includes ultra-precision raceway mirror grinding, ceramic ball screening, rotation runout test and high-speed aging test. 24-hour professional technical support for spindle matching, preload selection and high-speed lubrication maintenance plans. Factory direct bulk price, stable precision bearing stock for global machine tool and automation buyers.

6. Quality Control

1. Raw material chemical composition and hardness inspection
2. Integral quenching, cryogenic treatment and stress relief tempering
3. CNC ultra-precision inner/outer ring spherical raceway mirror grinding
4. High-precision ceramic ball sorting and phenolic cage precision molding
5. Dust-class 100 clean room assembly with high-speed spindle special grease filling
6. Ultra-low runout detection and continuous high-speed durability cycle testing
7. Full dimension precision inspection, anti-rust vacuum packaging, neutral export carton packing

Each batch completes vibration, noise and runout test to guarantee stable ultra-high speed precision operation.

7. Get A Quote

Send inquiries for 71914CE/HCP4DBA hybrid ceramic precision bearings used on CNC spindles and medical precision equipment.
Services after inquiry:

1. Standard formal quotation document delivered within 24 working hours
2. Technical guidance for spindle housing matching, preload adjustment and high-speed lubrication cycle
3. Upgrade options: P2 ultra-precision grade, medium/heavy preload, high-temperature synthetic grease
4. Competitive factory bulk unit price for large quantity orders

Please state order quantity, rotating speed and spindle type for complete formal quotation documents.

8. FAQ