FAGI DAC 40-74-40 Angular Contact Ball Bearing
The FAGI DAC 40-74-40 ABS bearing is far more than just an ordinary rotating component. Specifically designed for automotive wheel assemblies, it is an "angular contact" bearing; unlike standard bearings that handle only vertical loads, this model robustly supports combined loads—withstanding both vertical pressure and the lateral forces encountered during cornering. Another outstanding feature is its integrated ABS sensor: the unit not only facilitates wheel rotation but also communicates with the vehicle's braking system to prevent wheel lock-up during sudden braking, ensuring you maintain control of the vehicle.
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Product Detail
FAGI DAC 40-74-40 ABS Angular Contact Wheel Bearing
The Silent Guardian of Your Drive; Precision, Strength, and Road Safety
Where Smooth Rotation Meets Critical Vehicle Safety
Have you ever considered the enormous physical forces concentrated on your wheels when taking a sharp turn at highway speeds? It is not merely the sheer downward weight of the automobile pressing on the wheel hubs. Dynamic cornering forces, centrifugal energy, sudden bumps, and sudden directional shifts constantly push the wheel assembly from side to side. Under these intense working conditions, an ordinary bearing simply cannot hold up.
The FAGI DAC 40-74-40 ABS Double-Row Angular Contact Wheel Bearing is engineered precisely to master these combined loads. Unlike basic deep groove bearings that primarily support vertical loads, this specialized automotive bearing uses angular contact geometry. Its dual rows of precision steel balls contact the inner and outer raceways at carefully matched angles, giving the bearing unmatched rigidity against both heavy vertical weight (radial load) and harsh lateral cornering forces (axial load).
Even more importantly, this bearing is equipped with a built-in magnetic ABS sensor encoder. That means this component does not just allow your wheels to spin smoothly—it communicates continuously with your vehicle's onboard brake computer. During emergency braking, your Anti-Lock Braking System reads instantaneous speed signals directly from this bearing, preventing wheel lockup, skidding, and loss of steering control.
Decoding the Code: DAC 40-74-40 ABS in Plain Terms
Automotive bearing codes provide exact specifications about how the component fits into your vehicle's wheel hub:
- DAC (Double Angular Contact): This designation identifies the bearing as a double-row angular contact hub bearing. Having two distinct rows of load-bearing rolling elements inside a single, compact housing provides exceptional load capacity and prevents wobbling during cornering.
- First Number "40" (Inner Bore Diameter): The inside diameter is exactly 40 mm, matched to press tightly onto the steering knuckle shaft or drive axle spindle.
- Second Number "74" (Outer Diameter): The overall outside diameter is 74 mm, engineered to fit securely inside the wheel hub housing.
- Third Number "40" (Total Width): The complete width across the bearing face is 40 mm, providing wide structural support across the hub.
- Suffix "ABS": Denotes the integrated magnetic encoder seal on one side of the bearing, ensuring seamless real-time communication with the vehicle's ABS/ESP speed sensors.
FAGI DAC 40-74-40 ABS Technical Specifications
| Product Designation | DAC 40-74-40 ABS Wheel Hub Bearing |
| Brand | FAGI (Premium Automotive Grade) |
| Inner Bore Diameter (d) | 40 mm |
| Outer Diameter (D) | 74 mm |
| Width (B) | 40 mm |
| Internal Geometry | Double-Row Angular Contact Ball Bearing |
| Sensor Integration | Magnetic ABS Multi-Pole Ring Encoder |
| Material & Lubrication | High-Purity GCr15 Chrome Alloy, Pre-lubricated with High-Temp Synthetic Grease |
Why Mechanics and Vehicle Owners Trust FAGI DAC Bearings
When it comes to automotive steering and suspension, alloy quality and precision manufacturing make all the difference. FAGI delivers clear advantages over generic aftermarket parts:
- Combined Load Handling: Handles severe radial weight and intense axial cornering thrust effortlessly, maintaining precise wheel alignment and crisp handling feel.
- High-Precision ABS Signals: The magnetic encoder ring is manufactured with strict polarity tolerances, preventing false ABS warning lights or delayed brake interventions.
- Advanced Multi-Lip Sealing: Premium rubber seals on both faces keep road grime, puddle water, salt, and abrasive dust out while keeping long-life synthetic grease sealed inside.
- Whisper-Quiet Operation: Precision-ground raceways and micro-finished chrome steel balls eliminate rumbling, roaring, and high-speed road humming noises inside the passenger cabin.
- High Thermal & Shock Tolerance: FAGI heat-treated alloy resists micro-cracking and deformation even when driving over rough road potholes and during repeated heavy braking.
Vehicle Applications
The 40×74×40 mm dimension is an international standard across numerous passenger vehicle platforms:
- Front & Rear Wheel Hubs: Widely utilized as the primary wheel bearing in modern passenger cars, sedans, hatchbacks, and crossover SUVs equipped with ABS.
- ESP and Traction Control Systems: Supplies accurate wheel revolution data essential for Electronic Stability Programs (ESP) and Electronic Brakeforce Distribution (EBD).
- Fleet and Daily Drivers: Ideal for commercial taxis, delivery fleets, and personal vehicles requiring extended mileage without premature bearing failure.
Crucial Installation Rules for ABS Wheel Bearings
Proper installation ensures you achieve the full service life from your FAGI wheel bearing:
1. Mind the ABS Magnetic Side: The bearing has a specific orientation. The side containing the dark magnetic encoder ring must face inwards toward the vehicle's electronic ABS wheel sensor. Installing it backwards will immediately trigger an ABS dashboard warning light.
2. Use a Hydraulic Press (Never Strike with a Hammer): Never hammer directly on the bearing body or race. Always use a proper bearing press tool kit, applying steady, square pressure exclusively to the outer ring when pressing into the hub housing.
3. Thoroughly Clean the Knuckle Housing: Clean away all old rust, burrs, dirt, and metal shavings from inside the knuckle bore before pressing the new bearing in. Even a small piece of grit can cock the bearing off-center.
4. Torque Axle Nut to Exact Factory Specifications: Always torque the central axle shaft nut with a calibrated torque wrench according to vehicle OEM guidelines. Over-tightening or under-torquing leads to rapid bearing overheating and failure.
Frequently Asked Questions (FAQ)
Can I install a non-ABS bearing in place of an ABS model?
No. If your car is equipped with an Anti-Lock Braking System, installing a non-ABS bearing will leave the wheel speed sensor without a signal, disabling your ABS and traction safety systems.
How do I recognize a failing wheel bearing?
The most common signs are a deep humming or rumbling noise that gets louder with vehicle speed or changes tone when steering from side to side, along with detectable wheel play during inspection.
Does this bearing require grease before installation?
No. The FAGI DAC 40-74-40 ABS bearing comes factory-sealed and pre-lubricated with high-grade, heat-resistant synthetic grease designed for the lifetime of the unit.
Drive with Confidence — Choose Genuine FAGI Quality
Never compromise on safety, braking performance, or driving comfort. Equip your vehicle with authentic FAGI DAC 40-74-40 ABS wheel bearings. Contact KGICO for verified genuine stock, competitive wholesale rates, and fast delivery.
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