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Rex ZNT8220818 is a 2-1/2" bore mounted spherical roller bearing in a top angle protected screw take-up assembly. The cast iron housing features a single setscrew locking collar and a clearance seal. This 8000 series unit is designed for normal duty applications requiring take-up adjustment.
MODEL 10423572
Contact supplier for technical support on: 800-626-2120
$2,042.32 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable: See conditions
Ability to Relubricate
Yes
Adjusting screw thread size
7/8-9 NC
Allowable Working Load [2/3 Yield Strength] (lb)
4400
Available end cap
DTC8
Available End Cap
DTC8
Available Seal Type
K Light Contact Lip Seal; M Spring Loaded Heavy Contact Lip Seal (Buna and Viton); Z Clearance Seal; G Triple Lip
Base to centerline height (in)
4.375
Bearing Brand
REX ROLLER BEARING
Bolt Size (in)
3/4
Bore size (in)
2.5 in
Bore Size (in)
2.5 in
Cage Material
Engineered Polymer
Channel Width (in)
3
Clearance
C3 STANDARD
Distance between bolt holes (in)
34.5
Distance from Bearing Centerline to Housing Face (in)
1.38
Distance from frame bolt hole center to bearing centerline (in)
8.25
Fixed vs. Expansion
Fixed
Foot Height (in)
1.75
Frame
ZNT818
Frame height (in)
9.125 in
Frame Height (in)
9.125 in
Frame length (in)
36.5 in
Frame Length (in)
36.5 in
Frame Material
Welded Steel
Frame type
Protected Screw Take-up Assembly
Frame Type
Protected Screw Take-up Assembly
Frame Width (in)
3.9375 in
Grease Fitting Thread Size
1/8 NPT
Housing coating
Powder coated
Housing Coating
POWDER COATED
Housing construction
Solid
Housing Construction
Solid
Housing material
Cast iron
Housing Material
Cast Iron
Housing style
Take-Up Assembly
Housing Style
Take-Up Assembly
Housing type
Take-Up Assembly
Housing Type
Take-Up Assembly
Housing width (in)
4.13
Insert
2208U
Length Through Bore (in)
3.51
Locking device kit
SC8
Locking Device Kit
SC8
Locking Type
Single Set Collar
Lubrication type
EXXON RONEX MP STD
Lubrication Type
EXXON RONEX MP STD
Maximum Speed (RPM)
3300 rpm
Maximum Temperature (C)
107
Maximum Temperature (F)
225
Microlock kit
ML3
Misalignment Capability
±2.0° Misalignment - Dynamic
Misalignment Type
Dynamic
Net Weight
63.00
Overall rod length (in)
33.75
Overall width
3.5
Primary seal
Steel clearance seal
Primary Seal
STEEL CLEARANCE SEAL
Radial Dynamic Load Capacity (lb)
43240 lb
Radial Static Load Capacity (lb)
53500 lb
Retainer material
Engineered Polymer
Retainer Material
Engineered Polymer
Rolling element
Spherical Roller
Seal kit
ZS8
Seal type
Clearance Seal
Setscrew torque (in-lbs)
680
Size code
8
Size Code
8
Take-up block
ZN82208
Take-up Block
ZN82208
Take-up frame assembly type
Protected Screw Type
Take-up Frame Assembly Type
Protected Screw Type
Travel length (in)
18
Vibration frequency fundamental train
0.0072 cps
Vibration Frequency Fundamental Train
0.0072 cps
Vibration frequency inner ring defect
0.1791 cps
Vibration Frequency Inner Ring Defect
0.1791 cps
Vibration frequency outer ring defect
0.1376 cps
Vibration Frequency Outer Ring Defect
0.1376 cps
Vibration frequency roller spin
0.0607 cps
Vibration Frequency Roller Spin
0.0607 cps
Weight unit
LB
2 1/2" Mounted Spherical Roller Bearing, Top Angle Protected Screw Take-up Assembly, Single Setscrew Locking Collar, Clearance Seal
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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