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Rex MB2208 is a 2000 series normal duty mounted spherical roller bearing in a fixed cast iron 4-bolt round flange cartridge housing. It features a 2-1/2 in (63.5 mm) bore with single setscrew locking collar and spring-loaded heavy contact lip seal (M-seal). Suitable for industrial applications requiring compact flange mounting.
MODEL 10439729
Contact supplier for technical support on: 800-626-2120
$764.01 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable: See conditions
Ability to Relubricate
Yes
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
Bearing Brand
REX ROLLER BEARING
Bearing housing
Flange block 4 bolt round
Bearing housing material
Cast iron
Bearing Type
Spherical roller brg
Bolt circle radius (in)
3 3/8 in
Bolt Circle Radius (in)
3 3/8 in
Bolt hole circle diameter (in)
6 3/4 in
Bolt Hole Circle Diameter (in)
6 3/4 in
Bolt Size (in)
2.5 in
Bore length (in)
3 1/2 in
Bore Length (in)
3 1/2 in
Bore Size (in)
2.5 in
C dynamic load rating
43240 lb
Cage Material
Engineered Polymer
Clearance
C3 STANDARD
Co static load rating
53500 lb
Distance between bolt holes (in)
4 49/64 in
Distance Between Bolt Holes (in)
4 49/64 in
Distance from housing cast face to locking feature face (in)
7/8 in
Distance from Housing Cast Face to Locking Feature Face (in)
7/8 in
Fixed expansion
Fixed
Fixed vs. Expansion
Fixed
Foot Height (in)
0.75
Grease fitting size
1/8 NPT
Grease Fitting Thread Size
1/8 NPT
Height
8.63
Housing Cast Face to Outermost Bearing Face (in)
0.88
Housing coating
Powder coated
Housing Coating
POWDER COATED
Housing Construction
Solid
Housing Material
Cast Iron
Housing Outside Diameter (in)
8.13
Housing Style
Flange Block
Housing Type
Flange, Four Bolt
Inner ring hub diameter (in)
2 29/32 in
Inner Ring Hub Diameter (in)
2 29/32 in
Inner Ring Outside Diameter (in)
2.901
Insert
2208U
Length
8.63
Length Through Bore (in)
3.5
Locking collar outside diameter (in)
3 9/16 in
Locking Collar Outside Diameter (in)
3 9/16 in
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
Max Speed
2000 RPM
Max temperature (°F (°C))
225 (107) F (C)
Maximum Speed (RPM)
2000 rpm
Maximum Temperature (C)
107 C
Maximum Temperature (F)
225 F
Microlock kit
ML3
Microlock Kit
ML3
Misalignment Capability
±2.0° Misalignment - Dynamic
Misalignment Type
Dynamic
Mounted clearance
C3 standard
Mounting bolt size (in)
5/8 in
Mounting Bolt Size (in)
5/8 in
Mounting pad height (in)
3/4 in
Mounting Pad Height (in)
3/4 in
Net Weight
16.50
Overall Length (in)
8.13
Overall width
8.13
Primary seal
Buna spring loaded lip seal
Primary Seal
BUNA SPRING LOADED LIP SEAL
Radial Dynamic Load Capacity (lb)
43240 lb
Radial Static Load Capacity (lb)
53500 lb
Retainer Material
Engineered Polymer
Retainer type
Engineered polymer
Seal kit
MS8
Seal Kit
MS8
Seal Type
Heavy Contact Seal
Service instructions
BR3-001 REX 2, 3, 5, 6, 9000
Setscrew torque (in-lbs)
680 in/lbs
Setscrew Torque (in-lbs)
680 in/lbs
Shaft diameter (in)
2 1/2 in
Shaft locking
Single set collar
Size code
8
Size Code
8
Standoff distance (in)
3/32 in
Standoff Distance (in)
3/32 in
Threaded cover kit
TC8
Type of seal
Spring loaded heavy contact seal
Unit of dimension
in
Unit of Dimension
IN
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
Volume
0.048
Volume unit
Hectoliter
Volume Unit
Hectoliter
Weight unit
LB
Width
3.94
2 1/2" Mounted Spherical Roller Bearing, Fixed Cast Iron 4-Bolt Round Flange Block, Single Setscrew Locking Collar, Spring Loaded Heavy Contact 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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