Product Categories / Mounted Bearings / Pillow Block Bearing / UCPA201

UCPA201

Name: UCPA201 Pillow Block Bearing
Brand: LILY

$5.84 /Each

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Overview
Part Number	UCPA201
Brand: LILY	Interchangeable With: AMI
Bearing Part Number	UC201
Housing Part Number	PA204
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	UCPA200
Lubrication Fitting Tap	1/4-28 UNF
Dimensions
Bore Dia	12 mm
Bore Dia Tolerance	-0.0005" to 0"
Bearing Width	31 mm
Hole Width	12 mm
Hole Length	M10
Overall Height	62 mm
Center Height	30.2 mm
Whole Length	76 mm
Hole Center to Center	52 mm
Hole Ctr-to-Ctr Min	52 mm
Hole Ctr-to-Ctr Max	52 mm
Width of Inner Ring	38 mm
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	0.66 kg

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What does UCPA201 mean?

UCPA201 is an AMI metric cast iron tapped base pillow block unit with a wide inner ring insert and set screw locking, for a 12 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 UC201

PA: Housing style: cast iron tapped base pillow block. Housing part number is PA204

2: 200 series (normal duty)

01: Bore code: 01 = 12 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 UCPA201 mean?

UCPA201 is an AMI metric cast iron tapped base pillow block unit with a wide inner ring insert and set screw locking, for a 12 mm shaft. UC = wide inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is UC201, PA = housing style: cast iron tapped base pillow block. Housing part number is PA204, 2 = 200 series (normal duty), 01 = bore code: 01 = 12 mm.

What is the bore size of UCPA201?

The bore of UCPA201 is 12 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.

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.