B7214-E-T-P4S-UL FAG

Angular Contact Ball Bearing Single Row B7214-E-T-P4S-UL FAG

FAG B7214-E-T-P4S-UL single-row angular contact ball bearing: Bore d=70 mm, outer diameter D=125 mm, width B=24 mm, fillet radius r=1.1 mm. Contact angle 25° (E series), ultra-precision tolerance grade P4S, higher geometric accuracy than standard P4. Bore tolerance: 0/-0.008 mm, outer ring tolerance: 0/-0.010 mm. UL designation means universal matching design, allowing arbitrary paired mounting (DB, DF, DT) without spacer modification for spindle preload configuration.

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Technical Datasheet: B7214-E-T-P4S-UL FAG High Precision Angular Contact Ball Bearing

1. Dimensional Specifications (ISO 281 Standard)
FAG B7214-E-T-P4S-UL single-row angular contact ball bearing: Bore d=70 mm, outer diameter D=125 mm, width B=24 mm, fillet radius r=1.1 mm. Contact angle 25° (E series), ultra-precision tolerance grade P4S, higher geometric accuracy than standard P4. Bore tolerance: 0/-0.008 mm, outer ring tolerance: 0/-0.010 mm. UL designation means universal matching design, allowing arbitrary paired mounting (DB, DF, DT) without spacer modification for spindle preload configuration.
2. Material Composition & Mechanical Performance
Inner ring, outer ring and rolling balls: Vacuum degassed 100Cr6 bearing steel, quenched to HRC 60–64, excellent contact fatigue strength and wear resistance under high-speed cyclic load. Cage: Machined solid brass cage (CuZn39Pb3), low friction, stable guidance, resistant to high-speed centrifugal force and thermal deformation. Premium steel purity minimizes internal inclusions, greatly reducing premature flaking risk for precision spindle operation.
3. Core Manufacturing Processes
1. Closed hot forging optimizes metal grain flow and eliminates material porosity.
2. Precision CNC turning achieves near-net-shape blank geometry.
3. Controlled quenching and low-temperature tempering ensures stable hardness and minimal thermal distortion.
4. Raceway ultra-precision grinding, surface roughness Ra ≤0.012 μm.
5. Oscillating superfinishing optimizes contact surface texture to lower friction, vibration and noise. All processes comply with Schaeffler FAG precision bearing manufacturing specifications and ISO 3290.
4. Service Life Performance
Dynamic load rating Cr=69.5 kN, static load rating C0r=55.2 kN, calculated according to ISO 281:2019. Under standard operating conditions: moderate preload, operating temperature -20℃~120℃, sufficient clean lubrication, nominal L10 rated life ≥32,000 working hours. Primary life-limiting factors: excessive preload, contamination, lubricant degradation, shaft misalignment and sustained overspeed operation.
5. Industrial Application Fields
FAG B7214-E-T-P4S-UL precision angular contact bearing is developed for high-speed machine tool spindles. Core applications: CNC machining centers, grinding machine spindles, high-speed milling equipment, precision robotics rotary axes, semiconductor processing machinery and high-speed testing equipment. The 25° contact angle balances radial and axial rigidity; UL universal matching offers flexible pairing schemes for various spindle preload requirements.
6. Routine Maintenance Standards
Lubrication cycle: Grease lubrication every 400 operating hours; oil-air lubrication maintenance interval extends to 1200 hours. Recommended lubricant: high-speed spindle synthetic grease, filling ratio 20%–30% of internal cavity. Weekly cleaning to remove fine abrasives; inspect running vibration, temperature rise and abnormal noise. Temperature exceeding 25℃ above ambient or obvious chatter indicates preload failure or bearing damage.
7. Installation Guidelines
Pre-installation: Thoroughly clean shaft and housing seats, remove burrs and impurities. Adopt temperature-controlled hot mounting; avoid direct impact on raceways. Shaft coaxiality error limited below 0.008 mm; lock nut tightening torque 140–170 N·m. After assembly, implement 3-stage gradual speed running-in test. Wear lint-free gloves during operation to prevent surface contamination and fingerprint corrosion.

BRAND	FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI
BEARINGS NO.	B7214-E-T-P4S-UL FAG
TYPE	Angular Contact Ball Bearings
Inner(d)mm	70
Outer(D)mm	125
Width(B)mm	24
WEIGHT/KG	1.1
EAN CODE	4012801 464338

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fonkin-industries@188.com

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