Product Categories / Mounted Bearings / Pillow Block Bearing / UCSP206

UCSP206

Name: UCSP206 Pillow Block Bearing
Brand: LILY

$22.26 /Each

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Overview
Part Number	UCSP206
Brand: LILY	Interchangeable With: AMI
Bearing Part Number	UC206
Housing Part Number	SP206
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	UCSP200
Lubrication Fitting Tap	1/8-27 NPT
Dimensions
Bore Dia	30 mm
Bore Dia Tolerance	-0.0005" to 0"
Bearing Width	38.1 mm
Hole Width	14.3 mm
Hole Length	22.2 mm
Overall Height	98.4 mm
Pillow Height	15.9 mm
Center Height	50.8 mm
Whole Length	190.5 mm
Hole Ctr-to-Ctr Min	136.5 mm
Hole Ctr-to-Ctr Max	155.6 mm
Width of Inner Ring	50.8 mm
Mounting Bolt Size	M12
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	2.63 kg

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What does UCSP206 mean?

UCSP206 is an AMI metric cast iron pillow block unit with a wide inner ring insert and set screw locking, for a 30 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 UC206

SP: Housing style: cast iron pillow block. Housing part number is SP206

2: 200 series (normal duty)

06: Bore code: 06 × 5 = 30 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 UCSP206 mean?

UCSP206 is an AMI metric cast iron pillow block unit with a wide inner ring insert and set screw locking, for a 30 mm shaft. UC = wide inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is UC206, SP = housing style: cast iron pillow block. Housing part number is SP206, 2 = 200 series (normal duty), 06 = bore code: 06 × 5 = 30 mm.

What is the bore size of UCSP206?

The bore of UCSP206 is 30 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 M12 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. One of the most prevalent sizes in metric pillow block applications, M12 balances holding strength and versatility, making it the default choice for a broad range of conveyor, drive, and general industrial installations.

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 M12 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 M12 bolt corresponds to one of the most prevalent hole patterns in metric pillow block applications, balancing strength and versatility across conveyor, drive, and general industrial installations, 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.