S71908P4 Super Precision Stainless Angular Contact Ball Bearing 40x62x12mm High Speed Spindle Bearing

1. Product Overview

S71908P4 is single row ultra-precision stainless steel angular contact ball bearing, standard metric dimension 40mm inner bore × 62mm outer diameter × 12mm width, 719 ultra-thin lightweight series structure.

Model Code Full Explanation:

• S: Stainless steel anti-corrosion bearing material
• 719: Super thin section angular contact ball bearing size series
• 08: Nominal inner bore 40mm
• P4: ISO P4 super precision tolerance grade (ABEC7), ultra-low radial & axial runout

Adopts full stainless steel rings and stainless steel rolling balls, matched with lightweight phenolic resin cage, classic angular contact raceway structure that bears combined radial load and single-direction axial load simultaneously. Ultra-thin cross-section design greatly reduces spindle overall volume, P4 precision control guarantees ultra-stable high-speed rotation accuracy. Open non-sealed design matches oil-air circulating lubrication for ultra-high speed precision equipment. Widely used in PCB high-speed drilling spindles, medical lab testing instruments, optical detection equipment, miniature CNC high-speed spindles, semiconductor automation positioning shafts and all anti-corrosion high-precision transmission equipment.

2. Technical Specifications

3. Core Advantages

1. Full stainless steel construction, excellent anti-rust and anti-corrosion performance, adapt to humid medical workshop, semiconductor clean room and chemical light vapor working environment.
2. ISO P4 super precision grade, strictly controlled inner/outer ring dimensional tolerance, ultra-low radial and axial runout, meet micron-level precision positioning requirements of optical and PCB spindles.
3. 719 ultra-thin lightweight cross-section, occupies minimal radial installation space, realize miniaturization and lightweight design of high-speed precision spindles.
4. Superfinishing mirror raceway and stainless steel ball surfaces, ultra-low friction torque, stable vibration-free ultra-high speed continuous rotation, effectively reduce spindle heat generation.
5. Lightweight phenolic resin cage, low centrifugal force loss under ultra-high speed, avoid cage deformation and abnormal noise during long-time high-frequency operation.
6. Standard unified interchangeable metric dimensions, fully compatible with global mainstream S71908P4 precision spindle bearings, direct replacement without modifying spindle shaft and housing structure.
7. Open through oil-permeable structure without sealing barrier, smooth oil-air lubricant circulation inside bearing, rapid heat dissipation to prevent high-temperature grease carbonization failure.
8. Rich customizable options: 15°/25° contact angle switch, single/double-side non-contact VV seal upgrade, light/medium preload duplex DB/DF matched pairs, OEM laser marking on outer ring, neutral export anti-rust carton packaging, high-temperature synthetic grease pre-filling.

4. Application Scenarios

S71908P4 stainless steel P4 super precision angular contact ball bearing is compact anti-corrosion high-speed precision rotary spare part matched with 40mm shaft high-end industrial equipment:

• PCB drilling, routing machine high-speed spindle internal support bearing assemblies
• Medical laboratory analyzers, dental precision equipment rotating positioning units
• Optical inspection camera, laser measuring instrument miniature spindle bearing sets
• Miniature CNC engraving machine, mold high-speed spindle support components
• Semiconductor wafer handling automation linear rotary positioning shafts
• Small precision textile high-speed spinning spindle transmission parts

Aftermarket interchangeable S series stainless steel P4 grade ultra-thin angular contact ball bearing

Anti-rust ultra-precision high-speed spindle bearing solution for PCB spindle manufacturers, medical equipment OEM factories and optical automation bulk maintenance procurement.

5. Why Choose GQZ Bearing

We have 25 years of mature professional manufacturing experience for S series stainless steel P4 super precision angular contact ball bearings including S71908P4 thin spindle dedicated models.

Our S71908P4 bearings adopt unified international ISO precision dimensional standards, consistent dynamic/static load parameters, stainless steel quenching heat treatment and P4 ultra-precision grinding process standards, fully dimensionally interchangeable with original brand high-speed spindle bearings.

Complete OEM & ODM customized service system, supporting multiple contact angles, duplex matched preload groups, sealing structure transformation and personalized surface marking demands.

Strict pre-delivery full quality inspection workflow: AISI440C stainless steel raw material hardness & anti-corrosion test, stainless steel ball automatic sorting screening, long-cycle ultra-high speed temperature rise rotation aging test, P4 grade runout precision full batch one-by-one inspection.

Professional precision spindle bearing technical team provides one-to-one radial-axial combined load matching calculation, high-speed spindle interference fit tolerance design and oil-air cooling lubrication maintenance guidance within 24 working hours.

Standardized super precision bearing grinding production workshop provides competitive factory direct bulk wholesale price, stable long-term mass supply for global PCB spindle, medical and optical automation machinery spare parts purchasers.

We specialize in S series stainless steel P4 ultra-precision angular contact ball bearings, strict mirror raceway superfinishing and P4 tolerance precision control, committed to long-term stable win-win cooperation with anti-corrosion high-speed precision spindle transmission equipment suppliers.

6. Quality Control

• Raw material chemical composition, hardness and anti-corrosion resistance inspection for AISI440C stainless steel inner/outer ring and steel ball blanks
• Precision CNC hard turning forming processing, multiple stress relief tempering cycles, ultra-precision mirror superfinishing grinding for angular contact curved raceway surfaces
• Stainless steel ball high-temperature integral quenching, nano mirror polishing and high-precision automatic sorting production line
• Phenolic resin cage precision stamping forming process, single bearing assembly clearance inspection, anti-wear synthetic grease quantitative filling curing procedure
• Targeted professional performance testing: S71908P4 long-cycle PCB spindle ultra-high speed temperature rise rotation aging test, humid environment anti-rust durability simulation test, P4 grade radial runout precision one-by-one detection

Comprehensive re-inspection of overall dimensional tolerance, inner bore roundness and raceway surface smoothness before anti-rust oil coating and export moisture-proof carton packaging.

Each production batch of S71908P4 bearings undergoes PCB high-speed spindle continuous cycle rotation simulation test to guarantee stable low-vibration anti-corrosion ultra-precision rotary support performance for 40mm shaft miniaturized high-speed precision transmission systems.

7. Get A Quote Now

If you need S71908P4 40x62x12 stainless steel P4 super precision angular contact ball bearings for PCB spindle / medical optical equipment manufacturing, high-speed precision spindle assembly and semiconductor automation 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 axial combined load matching calculation, high-speed spindle press-fit installation and oil-air cooling lubrication technical support provided by professional super precision spindle bearing engineers
• Customized bearing performance upgrade options including 25° large contact angle transformation and DB back-to-back preload duplex matching
• Favorable factory direct bulk wholesale price for large quantity single model orders of S71908P4

Please provide purchase quantity, actual working conditions (ultra-high speed continuous operation / humid anti-rust required environment / micron-level precision positioning demand) to obtain complete official quotation documents.

8. FAQ