Thin Section Angular Contact Ball Bearings 71814 with 440C Stainless Steel for Semiconductor

Designation: 71814 440C Stainless Steel Bearings

Type: Super Precision Angular Contact Ball Bearings

Grade: P5/P4/P2 grade

Dimension: 70*90*10mm

Weight: 0.12kg

Elements: Si3N4 Silicon nitride ceramic balls

Feature: High Speed & & Wear and Corrosion Resistant

Application:Vacuum pumps, Medical devices, Semiconductors.

71814 440C Stainless Steel Angular Contact Ball Bearing (P4 Grade) – New Release

TKW Bearing proudly presents the 71814 440C stainless steel precision angular contact ball bearing (P4 grade), engineered for high-speed, high-precision, and mildly corrosive environments. Ideal for thin-section precision applications. 

Contact angle: 15° (CD type, high rigidity) , 25° (ACD Type, high-capacity)

• Precision grade: P4 (ISO, equivalent to ABEC-7) 

• Material: 440C (9Cr18Mo) stainless steel Rings/ Si3N4 Balls  

• Cage: Phenolic resin / stainless steel optional 

• Dynamic load rating Cr: 13.8 kN 

• Static load rating Cor: 16.0 kN 

• Limiting speed (grease): ≈17,000 rpm 

The similar design also avaiable of 71814 as follows:

-- 71814 ACD/P4

-- 71814 ACDGA/HCP4

-- 71814 ACDGC/HCP4

-- 71814 CD/P4DBA

-- 71814 CD/P4DGB

 Material & Technology Advantages 

• 440C (9Cr18Mo): High-carbon chromium martensitic stainless steel, 

vacuum quenched + cryogenically treated, hardness HRC 58–62. Excellent hardness, wear resistance, and moderate corrosion resistance for humid/weak acid-alkali environments. 

• P4 Ultra-precision: Radial runout ≤0.001 mm, face runout ≤0.002 mm. Low noise, low vibration, high-speed stability. 

• Thin-section & High Rigidity: 70×90×10 mm compact size, 15° contact angle for optimal load distribution. Strong combined radial/axial load capacity. 

• Cleanroom Manufacturing: Produced in dust-free workshops with superfinishing and ultrasonic cleaning. Ideal for medical, semiconductor, and food industries.  Applications 

• High-speed precision spindles (CNC, engraving machines) 

• Servo / VFD motors (anti-electric erosion, low noise) 

• Vacuum pumps & equipment (low dust, long life) 

• Medical centrifuges, dental equipment (non-magnetic, clean) 

• Semiconductor & optical instruments (high accuracy, low vibration) 

• Food & packaging machinery (rust-proof, easy cleaning) 

 Why Choose TKW 71814 440C/P4? 

• ✅ New Arrival in Stock: 2026 new production, same-day shipping, samples available 

• ✅ Genuine 440C: Material certificate provided, no substitution 

• ✅ P4 Quality Assured: 100% inspected, test report included 

• ✅ Cost-Effective: Domestic precision quality, 30%+ cost savings vs. imports 

• ✅ Customization: Contact angle, preload, cage, seals available on request