# Rex KBR3307 Round Flange Cartridge Bracket 3-7/16" Bore 3000 Series Normal Duty Eccentric Cam Locking - MROSupply.com ***Rex KBR3307 3000 series normal duty round flange cartridge bracket with 3-7/16 in (87.31 mm) bore. Cast iron housing with eccentric cam locking collar and single lip light contact seal. Compact flange-mounted spherical roller bearing unit for easy installation.*** ## Product details: - Catalog number: 10416728 - SKU: 502770 - Price: ***$3,401.61*** 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: 34.000 lb - UPC: 698210910846 - Technicall support: contact supplier for technical support on 800-626-2120 ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - Available end cap: Need EXT EC - Available End Cap: NEED EXT EC - 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 - Bolt circle radius (in): 4 5/16 in - Bolt Circle Radius (in): 4 5/16 in - Bolt hole circle diameter (in): 8 5/8 in - Bolt Hole Circle Diameter (in): 8 5/8 in - Bolt Size (in): 3.4375 in - Bore size (in): 3.4375 in - Bore Size (in): 3.4375 in - Cage Material: Engineered Polymer - Clearance: C3 STANDARD - Distance between bolt holes (in): 6 3/32 in - Distance Between Bolt Holes (in): 6 3/32 in - Fixed vs. Expansion: Fixed - Grease Fitting Thread Size: 1/8 NPT - Height: 10.75 - Housing coating: Powder coated - Housing Coating: POWDER COATED - Housing construction: Solid - Housing Construction: Solid - Housing material: Cast iron - Housing Material: Cast Iron - Housing style: Flange block - Housing Style: Flange Block - Housing type: Flange, Cartridge - Housing Type: Flange, Cartridge - Insert: 3307U - Length: 11.00 - Locking device kit: SC3307 - Locking Device Kit: SC3307 - Locking Type: Eccentric - Lubrication type: EXXON RONEX MP STD - Lubrication Type: EXXON RONEX MP STD - Maximum Speed (RPM): 1700 rpm - Mounting bolt size (in): 3/4 in - Mounting Bolt Size (in): 3/4 in - Net Weight: 34.00 - Primary seal: BUNA SGL lip light contact - Primary Seal: BUNA SGL LIP LIGHT CONTACT - Radial Dynamic Load Capacity (lb): 84330 lb - Radial Static Load Capacity (lb): 90700 lb - Retainer material: Engineered Polymer - Retainer Material: Engineered Polymer - Series: Flanged Cartridge Blocks - Size code: 10 - Size Code: 10 - Unit of dimension: in - Unit of Dimension: IN - Vibration frequency fundamental train: 0.0073 cps - Vibration Frequency Fundamental Train: 0.0073 cps - Vibration frequency inner ring defect: 0.1784 cps - Vibration Frequency Inner Ring Defect: 0.1784 cps - Vibration frequency outer ring defect: 0.1383 cps - Vibration Frequency Outer Ring Defect: 0.1383 cps - Vibration frequency roller spin: 0.0628 cps - Vibration Frequency Roller Spin: 0.0628 cps - Volume: 2.56 - Volume unit: GLL - Volume Unit: GLL - Weight unit: LB - Width: 5.00 ## Product documents / software: - [Rex Mounted Roller Bearings Installation Instructions](https://documents.mrosupply.com/product_documents/23/63/2363892/6ddc7fe1403d4227d36d1cb21d07ffff0b45a555_lA7yTlb.pdf) - [Rex Mounted Roller Bearings Installation Instructions](https://documents.mrosupply.com/product_documents/85/76/857687/BR3-001_manual.pdf) - [Rexnord Bearings Catalog](https://documents.mrosupply.com/product_documents/58/93/5893723/5c878e5c94dc5c3d338a775129f99b4f092be791_xnS4NzU.pdf) - [Rexnord Bearings Catalog](https://documents.mrosupply.com/product_documents/85/80/858069/BR101-100EN_catalog.pdf) ## Alternate products to `Rex KBR3307 Round Flange Cartridge Bracket 3-7/16" Bore 3000 Series Normal Duty Eccentric Cam Locking - MROSupply.com`: - [Rexnord 81416722 HP5705-4.5 MatTop modular plastic belt, 5705 series, 4.5 in (114.3 mm) wide, 1.5 in (38.1 mm) pitch, brown high-performance acetal, solid top surface, straight running, 420 lbs chain strength, polyester rod/pin material.](https://www.mrosupply.com/products/526511/as-markdown/) - [Rexnord 81416725 HP5705-15 MatTop conveyor chain assembly, 15 in (381 mm) wide, 1.5 in (38.1 mm) pitch, solid top surface, straight running. 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Chain strength rated at 420 lbs (1865 N).](https://www.mrosupply.com/products/526510/as-markdown/) - [Rex KBR6207 6000 series heavy duty adapter mounted round flange cartridge bracket, 2-7/16 in (61.91 mm) bore, cast iron housing, Shurlok adapter mounting system, single lip light contact seal. Designed for spherical roller bearings in demanding industrial applications.](https://www.mrosupply.com/products/502800/as-markdown/) - [Rexnord 614-167-2 NS7956 molded split sprocket with 1-1/2 in (38.10 mm) shaft-ready bore, 16 teeth, 6.407 in pitch diameter, and 1 keyway. Constructed from PA (polyamide) thermoplastic with a round bore shape and 1 set screw. Designed for MatTop and TableTop chain systems.](https://www.mrosupply.com/products/525150/as-markdown/) - [Dodge 119767 4535 Taper-Lock bushing for shaft mounting. Ductile iron (class 65) construction with 3-bolt flange. Rough bore accommodates shafts from 2-7/16" to 4-15/16". Rated for 110,000 lbf torque with 2,450 in/lb installation torque. Integral key not included.](https://www.mrosupply.com/products/583623/as-markdown/) ## Product's reviews: - Great service-fast shipping - Awesome service. I would highly recommend doing business with MRO! Price was cheapest anywhere - Good - On time good - Great service - easy to do business with, competitive pricing, excellent service and quick shipping. - Parts ordered - We were very happy with the parts we ordered. ## 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.