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Rexnord Corp.
MBR3207
3000 Series 4-Bolt Flange Spherical Roller Bearing Cartridge Unit
Item #100000375
- Spherical Roller Bearing Cartridge Unit
- 2 7/16 in Shaft Diameter
- Eccentric Cam Collar Locking Device
- Non-Expansion Bearing Design
- Spherical Roller Bearing Type
features
- Easy bearing clearance: can be field adjusted to meet application needs
- Mounting to suit the load and installation requirements
- Shaft ready: prelubricated with standard grease for normal operation
- other lubricants available for special conditions
- Fully self-aligning: spherical roller bearing to accommodate operational and installation misalignment
- Rugged housing: standard material – cast iron, steel or ductile iron available on request
- Carburized raceways: case-carburized inner races provide a hard, fatigue-resistant surface and a tough, crack-resistant ductile core
- Interchangeable seals: three types of seals to match the application requirements: Z seal, for the broad range of normal operating conditions
- K seal, for dusty, dirty conditions
- and M seal, for protection against liquid contamination
- For extra protection under severe conditions, auxiliary caps are also available
- Spherical bearing design accomodates continual misalignment.
- Collar is larger, thicker, and heavier to provide increased surface area contact with shaft.
- Threaded cover and microlock design allows bearing clearance adjustment, off-the-shelf units to meet special requirements.
- Wedges tight during operation, even if setscrews loosen.
- Carburized (case-hardened) inner ring resists fracturing, even under heavy loads
- Units are completely preassembled, preadjusted, greased, sealed, and ready to mount.
- Grips tight, even with undersized shafting.
| Lubrication Type | Exxon Ronex MP Std |
| Locking Device | Eccentric Cam Locking Collar |
| Set Screw Torque | 460 in lb |
| Inch/Metric | Inch |
| Type | Spherical Roller Bearing |
| Locking Collar O.D. | 3 9/16 in |
| Bore Dia. [Min] | 1 7/16 in |
| Bore Length | 3 21/32 in |
| Temperature Range [Min] | -40 °F |
| Flange Thickness | 5/8 in |
| Collar O.D. | 3 9/16 in |
| Housing Construction | 1 Piece |
| Temperature Range [Max] | 225 °F |
| Length Through Bore | 3.65625 in |
| Shaft Locking | Eccentric Locking Collar |
| Seal Type | Spring Loaded Heavy Contact Seals |
| Housing Height | 7 5/8 in |
| Housing Material | Cast Iron |
| Retainer Type | Engineered Polymer |
| Vibration Frequency Roller Spin | 0.0607 cps |
| Distance Between Bolt Holes | 4 19/32 in |
| Setscrew Torque | 460 in-lbs |
| Flange Type | 4-Bolt Piloted Flange |
| Collar Extension | 1 1/64 in |
| Temperature [Max] | 225 °F |
| Bore Dia. [Max] | 3 15/16 in |
| Mounting Bolt Size | 1/2 in |
| Misalignment Range | ±1 1/2° |
| Pilot Dia. | 5 1/2 in |
| Bearing Type | Spherical Roller |
| RPM [Max] | 2000 rpm |
| Pilot Depth | 1 in |
| Style | 4-Bolt Piloted Flange |
| Mounted Unit Duty | Heavy-Duty |
| Bolt Circle Radius | 3 1/4 in |
| Lubricant Type | Exxon Ronex MP |
| Bolt Size | 1/2 in |
| Size Code | 8 |
| Vibration Frequency Fundamental Train | 0.0072 cps |
| Lubrication | Relubricatable |
| Shaft Dia. | 2 7/16 in |
| Duty | Heavy-Duty |
| Housing Coating | Powder Coated |
| Bolt Circle Dia. | 6 1/2 in |
| Bolt Hole Spacing | 4 19/32 in |
| Series | 3000 |
| Relubricatable | Yes |
| Flange Pilot Diameter | 5 1/2 in |
| Vibration Frequency Inner Ring Defect | 0.1791 cps |
| End Type | Open End |
| Overall Width | 5 11/32 in |
| Static Load Rating | 53500 lb |
| Microlock Kit | ML3 |
| Primary Seal | Buna Spring Loaded Lip Seal |
| Shape | Round |
| Radial Dynamic Load Capacity | 43240 lb |
| Grease Fitting Size | 1/8 NPT |
| Vibration Frequency Outer Ring Defect | 0.1376 cps |
| Bearing Design | Non-Expansion |
| Housing Length | 7 5/8 in |
| Weight | 15.0 LB |
| EAN or UPC | 698210907198 |
