# Rexnord KB2108 1-1/2" Mounted Spherical Roller Bearing, Fixed Cast Iron 3-Bolt Round Flange Block, Single Setscrew Locking Collar, Single Lip Light Contact Seal - MROSupply.com ***Rexnord KB2108 1-1/2" mounted spherical roller bearing with fixed cast iron 3-bolt round flange block. Features a single setscrew locking collar and single lip light contact seal for normal duty applications.*** ## Product details: - Catalog number: 10433518 - SKU: 502825 - Price: ***$866.71*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Rexnord](https://www.mrosupply.com/brands/rexnord/) - Category: - [2-Bolt Flange](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/flanged-mounted-bearings/2-bolt-flange/) - [Flanged Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/flanged-mounted-bearings/) - [Mounted Ball Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/) - [Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/) - [Bearings](htts://www.mrosupply.com/bearings/) - Unit of measure: each - Weight: 6.700 lb - UPC: 698210621483 - Technicall support: contact supplier for technical support on 800-626-2120 ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - Ability to Relubricate: Yes - Available end cap: DTC4 - Available End Cap: DTC4 - 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 3 BOLT ROUND - Bearing housing material: Cast iron - Bearing Type: Spherical roller brg - Bolt circle radius (in): 2 1/2 in - Bolt Circle Radius (in): 2 1/2 in - Bolt Size (in): 1.5 in - Bore length (in): 2 7/8 in - Bore Length (in): 2 7/8 in - Bore Size (in): 1.5 in - C dynamic load rating: 19860 lb - Cage Material: Engineered Polymer - Clearance: C3 STANDARD - Co static load rating: 20900 lb - Distance between bolt holes (in): 4 21/64 in - Distance Between Bolt Holes (in): 4 21/64 in - Distance from housing cast face to inner ring long hub face (in): 11/16 in - Distance from Housing Cast Face to Inner Ring Long Hub Face (in): 11/16 in - Fixed expansion: Fixed - Fixed vs. Expansion: Fixed - Foot Height (in): 0.63 - Grease fitting size: 1/8 NPT - Grease Fitting Thread Size: 1/8 NPT - Height: 6.63 - Housing Cast Face to Outermost Bearing Face (in): 0.69 - Housing coating: Powder coated - Housing Coating: POWDER COATED - Housing Construction: Solid - Housing Material: Cast Iron - Housing Outside Diameter (in): 6.25 - Housing Style: Flange Block - Housing Type: Flange, Three Bolt - Inner ring hub diameter (in): 1 3/4 in - Inner Ring Hub Diameter (in): 1 3/4 in - Inner Ring Outside Diameter (in): 1.745 - Insert: 2108U - Length: 6.63 - Length Through Bore (in): 2.88 - Locking collar outside diameter (in): 2 5/16 in - Locking Collar Outside Diameter (in): 2 5/16 in - Locking device kit: SC4 - Locking Device Kit: SC4 - Locking Type: Single Set Collar - Lubrication type: EXXON RONEX MP STD - Lubrication Type: EXXON RONEX MP STD - Max Speed: 3600 rpm - Max temperature (°F (°C)): 225 (107) F (C) - Maximum Speed (RPM): 3600 rpm - Maximum Temperature (C): 107 C - Maximum Temperature (F): 225 F - Microlock kit: ML2 - Microlock Kit: ML2 - Misalignment Capability: ±2.0° Misalignment - Dynamic - Misalignment Type: Dynamic - Mounted clearance: C3 standard - Mounting bolt size (in): 1/2 in - Mounting Bolt Size (in): 1/2 in - Mounting pad height (in): 5/8 in - Mounting Pad Height (in): 5/8 in - Net Weight: 6.70 - Overall Length (in): 6.25 - Overall width: 6.25 - Primary seal: BUNA SGL lip light contact - Primary Seal: BUNA SGL LIP LIGHT CONTACT - Radial Dynamic Load Capacity (lb): 19860 lb - Radial Static Load Capacity (lb): 20900 lb - Retainer Material: Engineered Polymer - Retainer type: Engineered polymer - Seal kit: KS4 - Seal Kit: KS4 - Seal Type: Single Lip Contact Seal - Service instructions: BR3-001 REX 2, 3, 5, 6, 9000 - Setscrew torque (in-lbs): 325 in/lbs - Setscrew Torque (in-lbs): 325 in/lbs - Shaft diameter (in): 1 1/2 in - Shaft locking: Single set collar - Size code: 4 - Size Code: 4 - Standoff distance (in): 1/32 in - Standoff Distance (in): 1/32 in - Threaded cover kit: TC4 - Type of seal: Light contact seal - Unit of dimension: in - Unit of Dimension: IN - Vibration frequency fundamental train: 0.0070 cps - Vibration Frequency Fundamental Train: 0.0070 cps - Vibration frequency inner ring defect: 0.1445 cps - Vibration Frequency Inner Ring Defect: 0.1445 cps - Vibration frequency outer ring defect: 0.1055 cps - Vibration Frequency Outer Ring Defect: 0.1055 cps - Vibration frequency roller spin: 0.0499 cps - Vibration Frequency Roller Spin: 0.0499 cps - Volume: 0.713 - Volume unit: GLL - Volume Unit: GLL - Weight unit: LB - Width: 3.75 ## Product documents / software: - [Rex 2000, 3000, 5000, 9000 Series Roller Bearings](https://documents.mrosupply.com/product_documents/BM/BMT52111/000-Series-Roller-Bearings_Installation-Manual_PK8BJAF.pdf) ## Product's reviews: - Parts ordered - We were very happy with the parts we ordered. - Rexnord idler pulley - Great pricing and fast shipping A +++++++++ - Great service-fast shipping - Awesome service. I would highly recommend doing business with MRO! Price was cheapest anywhere - 1st timer - 1st purchase with MRO good product selection at best price. Will check in for my next purchase. ## FAQ: - 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.