UCTB211-34

UCTB211-34 Pillow Block Bearing
$93.09 /Each    info

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Overview

Part Number UCTB211-34
Brand: LILY Brand: LILY Interchangeable With: AMI
Size: 2.125"
UCTB211-322" UCTB211-342.125" UCTB211-352.1875"
Bearing Part Number UC211-34
Housing Part Number TB211
Product Series UCTB200

Characteristics

System of Measurement Inch
Housing Style Pillow Block Bearing
Bearing Type Ball Bearing
Bearing Duty Normal Duty
Self Aligning Yes
Inner Ring Type Wide Inner Ring
Shaft Mount Type Set Screw Locking
Bearing Seal Type Double Sealed
Number of Mounting Holes 2

Dimensions

Shaft Diameter 2.125"
Bore Dia 2.125"
Bearing Width 2.189"
Length Through Bore 2.189"
Width of Inner Ring 2"
Whole Length 5.5"
Whole Width 2"
Overall Height 4.625"
Housing Width 2 "
Center Height 2.25"
Hole Center to Center 4"
Hole Ctr-to-Ctr Min 4"
Hole Ctr-to-Ctr Max 4"
Bore Dia Tolerance -0.0005" to 0"
Base Width 2 "
Hole Length 5/8-11"
Hole Width 0.875"

Material

Bearings Material AISI 52100 Steel
Housing Material Cast Iron

Performance

Temperature Range -30° to 110 °C

Properties

Lubrication Required
Lubrication Fitting Tap 1/8-27 NPT
RoHS Compliant
REACH Compliant
Weight 6.4 lbs

What does UCTB211-34 mean?

UCTB211-34 is an AMI inch cast iron tapped base pillow block unit with a wide inner ring insert and set screw locking, for a 2 1/8" (53.97 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 UC211-34
TB
Housing style: cast iron tapped base pillow block. Housing part number is TB211
211
Frame size 211, 200 series (normal duty)
-34
Bore in sixteenths of an inch: 34/16" = 2 1/8" (53.97 mm)

Note: For inch mounted bearings, the number after the dash is the bore in sixteenths of an inch. For example, -8 is 1/2", -12 is 3/4" and -16 is 1".

Frequently asked questions

What does UCTB211-34 mean?

UCTB211-34 is an AMI inch cast iron tapped base pillow block unit with a wide inner ring insert and set screw locking, for a 2 1/8" (53.97 mm) shaft. UC = wide inner ring ball bearing insert, set screw locking, spherical outer ring. Insert part number is UC211-34, TB = housing style: cast iron tapped base pillow block. Housing part number is TB211, 211 = frame size 211, 200 series (normal duty), -34 = bore in sixteenths of an inch: 34/16" = 2 1/8" (53.97 mm).

What is the bore size of UCTB211-34?

The bore of UCTB211-34 is 2 1/8" (53.97 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.

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