Product Categories / Mounted Bearings / Pillow Block Bearing / UCP319

UCP319

Name: UCP319 Pillow Block Bearing
Brand: LILY

$165.53 /Each

Bulk orders will be discounted, please contact our sales for a bulk quote.

Ships in 1-2 business days after payment, plus 3-6 business days in transit via FedEx. Tracking information will be sent to your email.

Searching for the best price?

Complete the inquiry form, and we'll provide you with the most suitable solution.

Overview
Part Number	UCP319
Brand: LILY	Interchangeable With: AMI
Bearing Part Number	UC319
Housing Part Number	P319
Characteristics
System of Measurement	Metric
Bearing Type	Ball Bearing
Bearing Seal Type	Double Sealed
Inner Ring Type	Wide Inner Ring
Mounted Type	Pillow Block Bearing
Shaft Mount Type	Set Screw Locking
Product Series	UCP300
Lubrication Fitting Tap	1/8-27 NPT
Dimensions
Bore Dia	95 mm
Bore Dia Tolerance	-0.0005" to 0"
Bearing Width	103 mm
Hole Width	38 mm
Hole Length	50 mm
Overall Height	253 mm
Pillow Height	52 mm
Center Height	125 mm
Whole Length	470 mm
Hole Ctr-to-Ctr Min	337 mm
Hole Ctr-to-Ctr Max	380 mm
Width of Inner Ring	120 mm
Mounting Bolt Size	M30
Material
Bearings Material	AISI 52100 Steel
Housing Material	Cast Iron
Performance
Temperature Range	-30° to 110 °C
Properties
RoHS	Compliant
REACH	Compliant
Lubrication	Required
Weight	26.81 kg

Download Pdf

What does UCP319 mean?

UCP319 is an AMI metric cast iron pillow block unit with a wide inner ring insert and set screw locking, for a 95 mm shaft. The part number breaks down into 4 segments:

UC: Wide inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is UC319

P: Housing style: cast iron pillow block. Housing part number is P319

3: 300 series (heavy duty)

19: Bore code: 19 × 5 = 95 mm

Note: For metric mounted bearings, the bore is usually the bore code × 5 mm. Codes 00, 01, 02 and 03 are the exceptions: 10, 12, 15 and 17 mm.

Frequently asked questions

What does UCP319 mean?

UCP319 is an AMI metric cast iron pillow block unit with a wide inner ring insert and set screw locking, for a 95 mm shaft. UC = wide inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is UC319, P = housing style: cast iron pillow block. Housing part number is P319, 3 = 300 series (heavy duty), 19 = bore code: 19 × 5 = 95 mm.

What is the bore size of UCP319?

The bore of UCP319 is 95 mm.

The housing of pillow block bearing, crafted from iron, is engineered to withstand heavy-load and high-vibration conditions with the structural rigidity and dimensional stability needed to keep the overall mounted bearing assembly performing reliably over the long term.

Shaft retention is achieved through set screw locking in this pillow block bearing unit, which secures the shaft reliably against moderate loads and low-to-medium vibration — provided the shaft is of standard ground finish and the screws are correctly torqued — without damaging the shaft surface.

Two M30 bolts fasten the mounted bearing unit to the mounting surface, providing a secure and stable foundation that suits both new installations and direct replacement applications. A large industrial fastener size, M30 is associated with very large pillow block housings in heavy-duty continuous operations such as steel production, quarrying, or large-scale conveyor systems.

Why choose Iron for the bearing housing?

Because this pillow block bearing is specifically designed for heavy-load and high-vibration conditions, cast iron delivers superior rigidity and dimensional stability where lighter or polymer housings are prone to deformation under load, making it a purpose-built choice for this application rather than a generic substitute.

Why does this bearing use Set Screw Locking to secure the shaft?

Set screw locking works by tightening one or two hardened screws directly against the shaft surface, which makes it well suited to applications where shaft positioning is fixed and loads are moderate. Its main advantage over other shaft locking methods is simplicity and low cost, which matters most when quick installation and minimal tooling are the priority.

How does the M30 affect installation and compatibility?

The bolt size directly determines whether the pillow block bearing can be mounted onto an existing frame or structure without modification. An M30 bolt corresponds to a large industrial hole pattern associated with very large housings in heavy-duty continuous operations such as steel production, quarrying, or large-scale conveyor systems, so when replacing an existing unit, confirming this dimension ensures a drop-in fit. Mismatched bolt sizes may require redrilling the mounting surface or sourcing an adapter plate, adding time and cost to the bearing installation.