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

NTN Pillow Block Bearing: 3 1/2 in Bore, Cast Iron, Set Screws, 3 63/64 in Shaft Ht - Medium Duty Pillow Block Ball Bearings
NTNMedium Duty Pillow Block Ball Bearings

NTN Pillow Block Bearing: 3 1/2 in Bore, Cast Iron, Set Screws, 3 63/64 in Shaft Ht

The NTN UCPX-3.1/2M is a medium duty pillow block ball bearing with a 3 1/2 in bore, designed for inch-system applications. This cast-iron housed unit features set screw locking and a mounting bolt size of 3/4 in…

SKU 3G-OTH-105415

Brand
NTN
Item
Pillow Block Bearing: 3 1/2 in Bore, Cast Iron, Set Screws, 3 63/64 in Shaft Ht
Category
Medium Duty Pillow Block 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
UCPX-3.1/2M
Type
Cast Iron, Set Screws
Shaft Ht
3 63/64 in
Overall Ht
8 in
Mounting Bolt Size
3/4 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 UCPX-3.1/2M is a medium duty pillow block ball bearing with a 3 1/2 in bore, designed for inch-system applications. This cast-iron housed unit features set screw locking and a mounting bolt size of 3/4 in, with a shaft height of 3 63/64 in and an overall height of 8 in.

Frequently Asked Questions

What is the NTN UCPX-3.1/2M pillow block bearing used for?

The NTN UCPX-3.1/2M is a medium duty pillow block ball bearing used to support rotating shafts in industrial machinery, conveyors, and material handling systems. Its cast iron housing with set screw locking provides reliable shaft retention in inch-system applications.

What are the specifications of the NTN UCPX-3.1/2M?

The NTN UCPX-3.1/2M has a 3 1/2 in bore, cast iron housing with set screws, a shaft height of 3 63/64 in, overall height of 8 in, and a mounting bolt size of 3/4 in. It is designed for inch-system measurements and is a medium duty pillow block ball bearing.

Where to buy the NTN UCPX-3.1/2M worldwide?

3G Electric supplies the NTN UCPX-3.1/2M pillow block bearing to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this NTN bearing.

How to install the NTN UCPX-3.1/2M pillow block bearing?

To install the NTN UCPX-3.1/2M, first ensure the shaft is clean and free of burrs. Align the bearing with the mounting holes and tighten the 3/4 in bolts evenly. Secure the set screws onto the shaft using a hex key, then verify free rotation before full operation.

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 medium duty pillow block 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 Pillow Block Bearing: 1 in Bore, Cast Iron, Set Screws, 1 11/16 in Shaft Ht, 6.5 in Overall Lg (MPN UCPX-1M). Key specifications — Brand: NTN; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 in Bore, Cast Iron, Set Screws, 1 11/16 in Shaft Ht, 6.5 in Overall Lg (MPN UCPX-1M). Key specifications — Brand: NTN; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 3/4 in Bore, Cast Iron, Set Screws, 2 1/4 in Shaft Ht, 4.5 in Overall Ht (MPN UCPX-1.3/4M). Key specifications — Brand: NTN; Maximum Speed: 3,050 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 3/4 in Bore, Cast Iron, Set Screws, 2 1/4 in Shaft Ht, 4.5 in Overall Ht (MPN UCPX-1.3/4M). Key specifications — Brand: NTN; Maximum Speed: 3,050 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 3 7/16 in Bore, Cast Iron, Set Screws, 3 63/64 in Shaft Ht, 1,300 RPM (MPN UCPX-3.7/16M). Key specifications — Brand: NTN; Maximum Speed: 1,300 RPM; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 3 7/16 in Bore, Cast Iron, Set Screws, 3 63/64 in Shaft Ht, 1,300 RPM (MPN UCPX-3.7/16M). Key specifications — Brand: NTN; Maximum Speed: 1,300 RPM; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 1/2 in Bore, Cast Iron, Set Screws, 2 1/8 in Shaft Ht, 3,300 RPM (MPN UCPX-1.1/2M). Key specifications — Brand: NTN; Maximum Speed: 3,300 RPM; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 1/2 in Bore, Cast Iron, Set Screws, 2 1/8 in Shaft Ht, 3,300 RPM (MPN UCPX-1.1/2M). Key specifications — Brand: NTN; Maximum Speed: 3,300 RPM; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 11/16 in Bore, Cast Iron, Set Screws, 2 1/4 in Shaft Ht, 3,050 RPM (MPN UCPX-1.11/16M). Key specifications — Brand: NTN; Maximum Speed: 3,050 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 11/16 in Bore, Cast Iron, Set Screws, 2 1/4 in Shaft Ht, 3,050 RPM (MPN UCPX-1.11/16M). Key specifications — Brand: NTN; Maximum Speed: 3,050 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 3/16 in Bore, Cast Iron, Set Screws, 1 55/64 in Shaft Ht, 4,000 RPM (MPN UCPX-1.3/16M). Key specifications — Brand: NTN; Maximum Speed: 4,000 RPM; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 3/16 in Bore, Cast Iron, Set Screws, 1 55/64 in Shaft Ht, 4,000 RPM (MPN UCPX-1.3/16M). Key specifications — Brand: NTN; Maximum Speed: 4,000 RPM; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.

More from NTN

View all NTN parts
NTN Pillow Block Bearing: 1 in Bore, Cast Iron, Set Screws, 1 47/64 in Shaft Ht, 6.259 in Overall Lg (MPN UCPX05-100D1). Key specifications — Brand: NTN; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 in Bore, Cast Iron, Set Screws, 1 47/64 in Shaft Ht, 6.259 in Overall Lg (MPN UCPX05-100D1). Key specifications — Brand: NTN; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 2 1/4 in Bore, Cast Iron, Set Screws, 2 3/4 in Shaft Ht, 9.5 in Overall Lg (MPN UCPX-2.1/4M). Key specifications — Brand: NTN; Maximum Speed: 2,500 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 2 1/4 in Bore, Cast Iron, Set Screws, 2 3/4 in Shaft Ht, 9.5 in Overall Lg (MPN UCPX-2.1/4M). Key specifications — Brand: NTN; Maximum Speed: 2,500 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 7/16 in Bore, Cast Iron, Set Screws, 2 1/8 in Shaft Ht, 250°F Max Temp (MPN UCPX07-107D1). Key specifications — Brand: NTN; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 7/16 in Bore, Cast Iron, Set Screws, 2 1/8 in Shaft Ht, 250°F Max Temp (MPN UCPX07-107D1). Key specifications — Brand: NTN; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 2 1/2 in Bore, Cast Iron, Set Screws, 2 63/64 in Shaft Ht, 250°F Max Temp (MPN UCPX13-208D1). Key specifications — Brand: NTN; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 2 1/2 in Bore, Cast Iron, Set Screws, 2 63/64 in Shaft Ht, 250°F Max Temp (MPN UCPX13-208D1). Key specifications — Brand: NTN; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 15/16 in Bore, Cast Iron, Set Screws, 2 1/2 in Shaft Ht, 250°F Max Temp (MPN UCPX10-115D1). Key specifications — Brand: NTN; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 15/16 in Bore, Cast Iron, Set Screws, 2 1/2 in Shaft Ht, 250°F Max Temp (MPN UCPX10-115D1). Key specifications — Brand: NTN; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 1 7/16 in Bore, Cast Iron, Set Screws, 2 1/8 in Shaft Ht, 3,550 RPM (MPN UCPX-1.7/16M). Key specifications — Brand: NTN; Maximum Speed: 3,550 RPM; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 1 7/16 in Bore, Cast Iron, Set Screws, 2 1/8 in Shaft Ht, 3,550 RPM (MPN UCPX-1.7/16M). Key specifications — Brand: NTN; Maximum Speed: 3,550 RPM; Mounting Bolt Size: 1/2 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 3 in Bore, Cast Iron, Set Screws, 3 31/64 in Shaft Ht, 13 in Overall Lg (MPN UCPX-3M). Key specifications — Brand: NTN; Maximum Speed: 1,900 RPM; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 3 in Bore, Cast Iron, Set Screws, 3 31/64 in Shaft Ht, 13 in Overall Lg (MPN UCPX-3M). Key specifications — Brand: NTN; Maximum Speed: 1,900 RPM; Mounting Bolt Size: 3/4 in; System of Measurement: Inch.
NTN Pillow Block Bearing: 2 in Bore, Cast Iron, Set Screws, 2 1/2 in Shaft Ht, 8.625 in Overall Lg (MPN UCPX-2M). Key specifications — Brand: NTN; Maximum Speed: 2,900 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.
NTN
NTN Pillow Block Bearing: 2 in Bore, Cast Iron, Set Screws, 2 1/2 in Shaft Ht, 8.625 in Overall Lg (MPN UCPX-2M). Key specifications — Brand: NTN; Maximum Speed: 2,900 RPM; Mounting Bolt Size: 5/8 in; System of Measurement: Inch.