NTN UCP309D1

NTN UCP309D1 Pillow Block Bearing Unit

Description

The NTN UCP309D1 is a reliable and durable pillow block bearing unit designed for a wide range of industrial machinery. It consists of a P309 cast iron housing and a UC309D1 insert bearing, providing a complete, ready-to-mount solution. The unit is designed for easy installation and maintenance, with a grease nipple for re-lubrication to ensure a long service life.

Specifications

• Manufacturer: NTN
• Type: UCP309D1
• Bore Diameter: 45 mm
• Housing Material: Cast Iron
• Bearing Insert: UC309D1
• Shaft Locking: Set Screw
• Sealing: L3 Triple Lip Seal

Label Info

• Housing Marking: P309
• Bearing Marking: UC309
• Brand: NTN

Application

This pillow block bearing is ideal for use in conveyor systems, agricultural machinery, construction equipment, and general industrial applications where a reliable rotating shaft support is required.

Country of Origin

Made in Japan.

CO2 Impact

By purchasing this pre-owned item, you are helping to avoid the emission of approximately 8.4 kg of CO2, which is the estimated amount produced during the manufacturing of a new unit. This saving is comparable to driving a car for 42 kilometers.

Availability

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

FAQ

What is the significance of the ‘D1’ suffix in the UCP309D1 part number?

The ‘D1’ suffix in NTN’s nomenclature typically specifies the type of seal used. In this case, it often refers to NTN’s effective L3 triple-lip seal, which provides superior protection against contamination and moisture, extending the bearing’s life in harsh environments.

What is the recommended shaft tolerance for a 45mm bore bearing like this?

For general-purpose industrial applications using a set-screw locking mechanism, a shaft tolerance of h6 or h7 is typically recommended. This ensures a proper fit that is secure but allows for easier installation and removal compared to tighter interference fits.

How often should the UCP309D1 be re-lubricated?

Re-lubrication intervals are highly dependent on operating conditions such as speed, load, temperature, and environmental contamination. For moderate conditions, re-greasing every 500 to 1000 operating hours is a common starting point. However, it is crucial to consult the machine’s maintenance manual or NTN’s guidelines for your specific application.

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Last Update: Friday, March 13, 2026