Description

NTN – FL004 – Bearing

The NTN FL004 is a compact and robust 2-bolt flange bearing unit, specifically engineered to provide dependable support and smooth operation for rotating shafts in a wide variety of mechanical systems. Manufactured by NTN Corporation, a global leader in bearing technology, this flange unit combines precision, durability, and ease of installation — making it a preferred choice in industrial, agricultural, and machinery applications.

The NTN FL004 is part of the NTN FL000 series, known for their low-profile, lightweight flange designs with two mounting holes. The compact flange housing is made from high-quality cast iron, offering excellent mechanical strength and shock resistance. Its design allows for secure mounting to flat surfaces, enabling it to support shafts and reduce misalignment under dynamic loads. The FL004 bearing unit is suitable for moderate speed and load applications, and is commonly used in conveyors, agricultural machines, packaging systems, and automation equipment.

🔧 Key Dimensions and Specifications:

• Bore Diameter (Inner Diameter): 20 mm

• Bolt Hole Center-to-Center Distance: ~71 mm

• Flange Outer Diameter: ~85 mm

• Unit Height: ~32 mm

• Approximate Weight: 0.7 kg

This configuration makes the FL004 ideal for use in space-constrained installations where strength and reliability are still paramount. Despite its compact size, it delivers impressive load-handling capability and vibration dampening, ensuring consistent performance under a wide range of conditions.

At the core of the FL004 is a deep groove ball bearing insert, which is pre-lubricated and enclosed within the housing. This insert offers low friction, high precision rotation, and the ability to support both radial and light axial loads. It is secured within the housing using set screws on the inner ring, allowing for a firm grip on the shaft and preventing slippage during operation. The bearing is also self-aligning, meaning it can accommodate slight misalignments during installation or operation without compromising performance or causing premature wear.

One of the key benefits of the FL004 is its low-maintenance design. The bearing insert comes pre-lubricated with high-performance grease that reduces friction and wear, extending service life and reducing the need for frequent re-lubrication. A grease fitting (also called a zerk fitting) is usually provided on the housing to allow easy replenishment of lubricant when necessary, making maintenance simple and efficient.

The 2-bolt flange housing is designed for easy and secure installation. The two mounting holes are precisely spaced and allow for quick bolting to a machine frame or flat surface. The compact flange form factor also contributes to reduced installation time and a smaller footprint, especially in tight assemblies or modular equipment.

The FL004 is suitable for use in both indoor and outdoor environments, thanks to its corrosion-resistant materials and enclosed design. The housing’s painted or coated cast iron surface resists rust and weathering, while the sealed bearing insert keeps out dust and contaminants. This makes it an excellent choice for use in agricultural machines, food processing conveyors, HVAC systems, material handling units, and light-duty industrial machinery.

Being part of NTN’s widely supported bearing catalog, the FL004 is also compatible with a wide range of accessories such as replacement inserts, locking collars, and covers. This ensures flexibility, ease of replacement, and a reliable supply of parts when needed.

In conclusion, the NTN FL004 2-Bolt Flange Bearing Unit offers a perfect balance of strength, efficiency, and compact design. With a 20mm bore, rugged cast iron housing, sealed ball bearing insert, and user-friendly mounting design, it delivers excellent value for applications that demand consistent, low-maintenance performance. Whether you’re maintaining existing equipment or designing new mechanical systems, the FL004 provides a trusted and time-tested bearing solution backed by the engineering excellence of NTN.

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