Product Categories / Mounted Bearings / Pillow Block Bearing / BPR1

BPR1

Name: BPR1 Pillow Block Bearing
Brand: LILY

$4.56 /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	BPR1
Brand: LILY	Interchangeable With: AMI
Bearing Part Number	B1
Housing Part Number	PP4
Characteristics
System of Measurement	Metric
Bearing Type	Ball Bearing
Bearing Seal Type	Double Sealed
Inner Ring Type	Narrow Inner Ring
Mounted Type	Pillow Block Bearing
Shaft Mount Type	Set Screw Locking
Product Series	BPR200
RubberRing	R4
Dimensions
Bore Dia	12 mm
Bore Dia Tolerance	-0.0005" to 0"
Bearing Width	22 mm
Hole Width	10.3 mm
Hole Length	12.7 mm
Overall Height	52.4 mm
Pillow Height	3.2 mm
Center Height	25.4 mm
Whole Length	104.8 mm
Hole Ctr-to-Ctr Min	73 mm
Hole Ctr-to-Ctr Max	79 mm
Width of Inner Ring	25.4 mm
Mounting Bolt Size	M10
Material
Bearings Material	AISI 52100 Steel
Housing Material	Pressed Steel
Performance
Stamping Load Limit	1.56 kN
Temperature Range	-30° to 110 °C
Properties
RoHS	Compliant
REACH	Compliant
Lubrication	Required
Weight	0.21 kg

Download Pdf

What does BPR1 mean?

BPR1 is an AMI metric pressed steel pillow block unit with a narrow inner ring insert and set screw locking, for a 12 mm shaft. The part number breaks down into 3 segments:

B: Narrow inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is B1

PR: Housing style: pressed steel pillow block. Housing part number is PP4

1: Frame size 201, 200 series (normal duty); metric bore 12 mm

Frequently asked questions

What does BPR1 mean?

BPR1 is an AMI metric pressed steel pillow block unit with a narrow inner ring insert and set screw locking, for a 12 mm shaft. B = narrow inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is B1, PR = housing style: pressed steel pillow block. Housing part number is PP4, 1 = frame size 201, 200 series (normal duty); metric bore 12 mm.

What is the bore size of BPR1?

The bore of BPR1 is 12 mm.

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 M10 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. M10 represents a mid-range metric fastener, widely used across standard industrial pillow blocks where moderate radial loads and everyday operating conditions are the norm.

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 M10 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 M10 bolt corresponds to a mid-range hole pattern widely used in standard metric pillow blocks across a broad range of industrial applications, 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 installation.