Product Categories / Mounted Bearings / Pillow Block Bearing / UP001C

UP001C

Name: UP001C Pillow Block Bearing
Brand: LILY

$5.63 /Each

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Overview
Part Number	UP001C
Brand: LILY	Interchangeable With: AMI
Bearing Part Number	U001
Housing Part Number	P001
Characteristics
System of Measurement	Metric
Bearing Type	Ball Bearing
Bearing Seal Type	Double Sealed
Inner Ring Type	Extra Narrow Inner Ring
Mounted Type	Pillow Block Bearing
Shaft Mount Type	Eccentric Collar Locking
Product Series	UP000C
Dimensions
Bore Dia	12 mm
Bore Dia Tolerance	-0.0005" to 0"
Cover Dia	31 mm
Hole Width	7 mm
Overall Height	38 mm
Pillow Height	6 mm
Center Height	19 mm
Whole Width	33 mm
Whole Length	71 mm
Hole Center to Center 1	56 mm
Width of Inner Ring	16 mm
Mounting Bolt Size	M6
Material
Bearings Material	AISI 52100 Steel
Housing Material	ZDC Alloy
Performance
Temperature Range	-30° to 110 °C
Properties
RoHS	Compliant
REACH	Compliant
Lubrication	Required
Weight	0.1 kg

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What does UP001C mean?

UP001C is an AMI metric ZDC alloy pillow block unit with a extra narrow inner ring insert and eccentric collar locking, for a 12 mm shaft. The part number breaks down into 5 segments:

U: Extra narrow inner ring ball bearing insert, eccentric collar locking, spherical outer ring. Insert part number is U001

P: Housing style: ZDC alloy pillow block. Housing part number is P001

0: 000 series (light duty)

01: Bore code: 01 = 12 mm

C: Cover configuration: two open covers, for positions where the shaft runs through the bearing

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 UP001C mean?

UP001C is an AMI metric ZDC alloy pillow block unit with a extra narrow inner ring insert and eccentric collar locking, for a 12 mm shaft. U = extra narrow inner ring ball bearing insert, eccentric collar locking, spherical outer ring. Insert part number is U001, P = housing style: ZDC alloy pillow block. Housing part number is P001, 0 = 000 series (light duty), 01 = bore code: 01 = 12 mm, C = cover configuration: two open covers, for positions where the shaft runs through the bearing.

What is the bore size of UP001C?

The bore of UP001C is 12 mm.

Shaft retention is achieved through eccentric collar locking in this pillow block bearing unit, which secures the shaft reliably against moderate loads and intermittent vibration — provided the collar is rotated firmly in the direction of shaft rotation and the locking screw is fully tightened — without damaging the shaft surface.

Two M6 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. M6 is a small-scale fastener used on compact pillow blocks with fine shaft bores, suited to light loads and applications where overall assembly size is a priority.

Why does this bearing use Eccentric Collar Locking to secure the shaft?

Eccentric collar locking works by rotating an offset collar in the direction of shaft rotation until it clamps firmly around the shaft, which makes it well suited to applications where the shaft surface must remain undamaged and load distribution needs to be more even. Its main advantage over other shaft locking methods is a broader contact area that reduces shaft stress, which matters most when the application involves intermittent loads, frequent starts and stops, or softer shaft materials.

How does the M6 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 M6 bolt corresponds to a fine-pitch hole pattern used on compact, light-duty metric housings with small shaft bores, 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.