Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
NTN 4 Bolt Flange Bearing: Radial Ball, 2 3/8 in Bore, Cast Iron, Set Screws - General Purpose Flange-Mount Ball Bearings
NTNGeneral Purpose Flange-Mount Ball Bearings

NTN 4 Bolt Flange Bearing: Radial Ball, 2 3/8 in Bore, Cast Iron, Set Screws

The NTN 4 Bolt Flange Bearing is a general purpose flange-mount ball bearing with a 2 3/8 in cylindrical bore and a cast iron housing. It features set screws for shaft locking, uses NLGI #3 Equivalent lubricant, and…

SKU 3G-OTH-115387

Brand
NTN
Item
4 Bolt Flange Bearing: Radial Ball, 2 3/8 in Bore, Cast Iron, Set Screws
Category
General Purpose Flange-Mount Ball Bearings
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

NTN
Manufacturer Part Number
UCFU-2.3/8M
Type
Cast Iron, Set Screws, Square
Bore
2 3/8 in
Lg
6 7/8 in
Bore Type
Cylindrical
Lubricant Material
NLGI #3 Equivalent
Mounting Bolt Size
5/8 in
System of Measurement
Inch
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

NTN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The NTN 4 Bolt Flange Bearing is a general purpose flange-mount ball bearing with a 2 3/8 in cylindrical bore and a cast iron housing. It features set screws for shaft locking, uses NLGI #3 Equivalent lubricant, and has a mounting bolt size of 5/8 in. This inch-system unit is identified by manufacturer part number UCFU-2.3/8M.

Frequently Asked Questions

What is the NTN 4 Bolt Flange Bearing used for?

The NTN 4 Bolt Flange Bearing is used to support rotating shafts in industrial machinery, conveyors, and material handling equipment. Its cast iron housing and set-screw locking provide reliable radial load support in general-purpose applications where flange mounting is required.

What are the specifications of the NTN UCFU-2.3/8M flange bearing?

The NTN UCFU-2.3/8M has a 2 3/8 in cylindrical bore, cast iron square housing, and set-screw shaft locking. It uses NLGI #3 Equivalent lubricant, has a mounting bolt size of 5/8 in, and an overall length of 6 7/8 in. This inch-system bearing is designed for general-purpose flange-mount applications.

Where to buy NTN flange bearings worldwide?

You can source the NTN 4 Bolt Flange Bearing through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this NTN UCFU-2.3/8M bearing.

How to install an NTN set-screw flange bearing?

To install the NTN flange bearing, first clean the shaft and housing bore. Slide the bearing onto the shaft, align the flange bolt holes, and tighten the mounting bolts to the recommended torque. Then tighten the set screws evenly against the shaft to secure it. Use NLGI #3 grease for relubrication as needed.

Used in

Common applications for NTN
Automotive driveline — NTN tapered roller bearing assemblies (e.g., 4T-30303) for differential and wheel hub applications
Conveyor systems — NTN 4-bolt flange bearings (e.g., UCF211-200D1) for idler rollers and take-up units
Machine tool spindles — NTN duplex angular contact bearings (e.g., ML7006CVDUJ74S) for high-speed precision rotation
Industrial fans — NTN high-temperature radial ball bearings (e.g., 6004FT150) for oven and dryer exhaust systems
Pump drives — NTN radial ball bearings (e.g., 6008LLBC3/L627) for electric motor and pump shaft support
Agricultural equipment — NTN tapered roller bearing cones (e.g., LM29748L) for gearbox and PTO shaft assemblies

NTN Products

3G Electric supplies NTN general purpose flange-mount ball bearings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
NTN 4 Bolt Flange Bearing: Radial Ball, 2 3/16 in Bore, Cast Iron, Set Screws, 6 13/32 in Lg, Square (MPN UCFU-2.3/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 2 3/16 in Bore, Cast Iron, Set Screws, 6 13/32 in Lg, Square (MPN UCFU-2.3/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 2 in Bore, Cast Iron, Set Screws, 6 13/32 in Lg, Square (MPN UCFU-2M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 2 in Bore, Cast Iron, Set Screws, 6 13/32 in Lg, Square (MPN UCFU-2M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 2 1/8 in Bore, Cast Iron, Set Screws, 6 13/32 in Lg, Square (MPN UCFU-2.1/8M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 2 1/8 in Bore, Cast Iron, Set Screws, 6 13/32 in Lg, Square (MPN UCFU-2.1/8M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 2 1/4 in Bore, Cast Iron, Set Screws, 6 7/8 in Lg, Square (MPN UCFU-2.1/4M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 2 1/4 in Bore, Cast Iron, Set Screws, 6 7/8 in Lg, Square (MPN UCFU-2.1/4M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 1 9/16 in Bore, Cast Iron, Set Screws, 5 5/32 in Lg, Square (MPN UCFU-1.9/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 1 9/16 in Bore, Cast Iron, Set Screws, 5 5/32 in Lg, Square (MPN UCFU-1.9/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 2 3/16 in Bore, Cast Iron, Set Screws, 6 7/8 in Lg, Square (MPN UCFUX-2.3/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 2 3/16 in Bore, Cast Iron, Set Screws, 6 7/8 in Lg, Square (MPN UCFUX-2.3/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.

More from NTN

View all NTN parts →
NTN 2 Bolt Flange Bearing: Radial Ball, 1/2 in Bore, Cast Iron, Set Screws, 4 7/16 in Lg, Rhombus (MPN UCFL201-008D1). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 7/16 in; System of Measurement: Inch.
NTN
NTN 2 Bolt Flange Bearing: Radial Ball, 1/2 in Bore, Cast Iron, Set Screws, 4 7/16 in Lg, Rhombus (MPN UCFL201-008D1). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 7/16 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 2 15/16 in Bore, Cast Iron, Eccentric Collar, 7 7/8 in Lg (MPN UELFU-2.15/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 2 15/16 in Bore, Cast Iron, Eccentric Collar, 7 7/8 in Lg (MPN UELFU-2.15/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN 2 Bolt Flange Bearing: Radial Ball, 2 in Bore, Cast Iron, Set Screws, 8 17/32 in Lg, Rhombus (MPN UCFLUX-2M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN 2 Bolt Flange Bearing: Radial Ball, 2 in Bore, Cast Iron, Set Screws, 8 17/32 in Lg, Rhombus (MPN UCFLUX-2M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 1 5/8 in Bore, Cast Iron, Set Screws, 5 13/32 in Lg, Square (MPN UCFU-1.5/8M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 1 5/8 in Bore, Cast Iron, Set Screws, 5 13/32 in Lg, Square (MPN UCFU-1.5/8M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN 2 Bolt Flange Bearing: Radial Ball, 1 3/8 in Bore, Cast Iron, Set Screws, 6 5/32 in Lg, Rhombus (MPN UCFLU-1.3/8M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN 2 Bolt Flange Bearing: Radial Ball, 1 3/8 in Bore, Cast Iron, Set Screws, 6 5/32 in Lg, Rhombus (MPN UCFLU-1.3/8M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 3 in Bore, Cast Iron, Set Screws, 7 7/8 in Lg, 3 23/64 in Wd (MPN UCFU-3M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 3 in Bore, Cast Iron, Set Screws, 7 7/8 in Lg, 3 23/64 in Wd (MPN UCFU-3M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN 2 Bolt Flange Bearing: Radial Ball, 1 3/16 in Bore, Cast Iron, Set Screws, 5 19/32 in Lg (MPN UCFLU-1.3/16MFG1). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 3/8 in; System of Measurement: Inch.
NTN
NTN 2 Bolt Flange Bearing: Radial Ball, 1 3/16 in Bore, Cast Iron, Set Screws, 5 19/32 in Lg (MPN UCFLU-1.3/16MFG1). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 3/8 in; System of Measurement: Inch.
NTN 4 Bolt Flange Bearing: Radial Ball, 1 11/16 in Bore, Cast Iron, Set Screws, 5 13/32 in Lg, 52100 (MPN UCFU-1.11/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN 4 Bolt Flange Bearing: Radial Ball, 1 11/16 in Bore, Cast Iron, Set Screws, 5 13/32 in Lg, 52100 (MPN UCFU-1.11/16M). Key specifications — Bore Type: Cylindrical; Brand: NTN; Lubricant Material: NLGI #3 Equivalent; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.