UKP315+HA2315

UKP315+HA2315 Pillow Block Bearing
$385.29 /Each    info

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Overview

Part Number UKP315+HA2315
Brand: LILY Brand: LILY Interchangeable With: AMI
Bearing Part Number UK315+HA2315
Housing Part Number P315
Product Series UKP300+H

Characteristics

System of Measurement Inch
Housing Style Pillow Block Bearing
Housing Configuration 1 Piece Solid
Bearing Type Ball Bearing
Bearing Duty Heavy Duty
Expansion Type Non-Expansion Bearing (Fixed)
Bore Type Round
Inner Ring Type Wide Inner Ring
Shaft Mount Type Tapered Adapter Sleeve Locking
Bearing Seal Type Double Sealed
Number of Mounting Holes 2

Dimensions

Shaft Diameter 2.4375"
Bore Dia 2.4375"
Width of Inner Ring 3.875"
Whole Length 15.0781"
Whole Width 3.875"
Overall Height 7.9219"
Center Height 3.9375"
Pillow Height 1.5781"
Mounting Bolt Size 0.875"
Hole Ctr-to-Ctr Min 10.6875"
Hole Ctr-to-Ctr Max 12.0625"
Bore Dia Tolerance -0.0005" to 0"
Base Width 3.875 "
Hole Length 1.5625"
Hole Width 1.0625"
Width with Adapter Sleeve 2.874"

Material

Bearings Material AISI 52100 Steel
Housing Material Cast Iron

Performance

Dynamic Radial Load 25600 lbf
Static Radial Load 17300 lbf
Temperature Range -30° to 110 °C

Properties

Lubrication Required
Lubrication Fitting Tap 1/8-27 NPT
RoHS Compliant
REACH Compliant
Weight 30.6 lbs

What does UKP315+HA2315 mean?

UKP315+HA2315 is an AMI inch cast iron pillow block unit with a wide inner ring insert and tapered adapter sleeve locking, for a 2 7/16" (61.91 mm) shaft. The part number breaks down into 4 segments:

UK
Wide inner ring ball bearing insert, tapered adapter sleeve locking. Insert part number is UK315+HA2315
P
Housing style: cast iron pillow block. Housing part number is P315
315
Frame size 315, 300 series (heavy duty)
+HA2315
Tapered adapter sleeve HA2315, which mounts the unit on a 2 7/16" (61.91 mm) shaft

Frequently asked questions

What does UKP315+HA2315 mean?

UKP315+HA2315 is an AMI inch cast iron pillow block unit with a wide inner ring insert and tapered adapter sleeve locking, for a 2 7/16" (61.91 mm) shaft. UK = wide inner ring ball bearing insert, tapered adapter sleeve locking. Insert part number is UK315+HA2315, P = housing style: cast iron pillow block. Housing part number is P315, 315 = frame size 315, 300 series (heavy duty), +HA2315 = tapered adapter sleeve HA2315, which mounts the unit on a 2 7/16" (61.91 mm) shaft.

What is the bore size of UKP315+HA2315?

The bore of UKP315+HA2315 is 2 7/16" (61.91 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 tapered adapter sleeve locking in this pillow block bearing unit, which secures the shaft reliably against heavy loads, high torque, and continuous vibration — provided the adapter sleeve is correctly seated and the locknut is tightened to the specified torque — without damaging the shaft surface.
Two 0.875 inch 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. This size is used on extra heavy-duty bearings where structural integrity of the mounting is as critical as the bearing itself, typically in heavy industrial or mining equipment.

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 Tapered Adapter Sleeve Locking to secure the shaft?

Tapered adapter sleeve locking works by compressing a precision-machined sleeve onto the shaft as the locknut is tightened, creating a strong concentric grip, which makes it well suited to applications where heavy loads, high torque, or frequent repositioning are required. Its main advantage over other shaft locking methods used in mounted bearing applications is superior holding force combined with self-centering alignment, which matters most when shaft runout, vibration, or the need for periodic bearing relocation demand a more robust and precise locking solution.

How does the 0.875 inch 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. A 0.875 inch bolt corresponds to an extra heavy-duty hole pattern used on oversized housings in demanding industrial or mining environments, 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.

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