NTN UK208D1

NTN UK208D1 Ball Bearing Insert

Description

The NTN UK208D1 is a high-performance ball bearing insert engineered for reliability in demanding industrial applications. It features a set screw locking mechanism for secure shaft mounting and a spherical outer surface to accommodate initial misalignment when installed in a suitable housing. The D1 designation refers to NTN’s highly effective double-lip seal, which provides superior protection against contamination and ensures lubricant retention, extending the bearing’s service life.

Specifications

• Bore Diameter: 40 mm
• Outer Diameter: 80 mm
• Overall Width: 49.2 mm
• Locking Mechanism: Set Screw
• Seal Type: Double Lip Seal (D1 Suffix)
• Outer Ring: Spherical
• Material: Bearing Steel

Label Info

• Manufacturer: NTN
• Type: UK208D1
• EAN: 4547359241822

Application

This bearing insert is widely used in agricultural machinery, conveyor systems, construction equipment, and food processing machinery where a reliable and easily mountable bearing solution is required.

Country of Origin

Made in Japan.

CO2 Impact

By purchasing this new surplus item, you contribute to a circular economy and help avoid 1.36 kg of CO2 emissions compared to new production.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
What is the main advantage of the D1 seal designation on this NTN bearing?

The D1 designation indicates a double-lip seal, often with an outer flinger. This design provides superior protection against solid and liquid contaminants while effectively retaining grease, making it ideal for harsh or dirty environments.

Question?

Can this UK208D1 insert be used in any standard 208 series pillow block housing?

Yes, this bearing insert has standardized dimensions (80mm spherical OD) and is designed to be fully interchangeable with most 208 series housings, such as UCP, UCF, and UCFL types, regardless of the housing manufacturer.

Question?

What is the recommended set screw tightening torque for this 40mm bore bearing?

For an M8x1 set screw typically used in this size, NTN generally recommends a tightening torque of approximately 14.7 N-m (Newton-meters). Always consult the manufacturer’s specific installation guide for the most accurate values to ensure proper and safe shaft locking.

Last Update: Friday, March 13, 2026

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