# Rex ZBR5500 Round Flange Cartridge Bracket 5" Bore Heavy Duty Spherical Roller Bearing - MROSupply.com ***Rex ZBR5500 5000 series heavy duty round flange cartridge bracket mounted spherical roller bearing with a 5 in (127.0 mm) bore. Cast iron 6-bolt housing, double setscrew locking collar, standard clearance seal.*** ## Product details: - Catalog number: 10409949 - SKU: 507893 - Price: ***$5,015.87*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Rexnord](https://www.mrosupply.com/brands/rexnord/) - Category: - [Piloted Flange](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/flanged-mounted-bearings/piloted-flange/) - [Flanged Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/flanged-mounted-bearings/) - [Mounted Roller Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/) - [Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/) - [Bearings](htts://www.mrosupply.com/bearings/) - Unit of measure: each - Weight: 125.000 lb - UPC: 698210637712 - Technicall support: contact supplier for technical support on 800-626-2120 ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - Available seal type: M Spring Loaded Heavy Contact Lip Seal (Buna and Viton); Z Clearance Seal; G Triple Lip - Available Seal Type: 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): 6 3/8 in - Bolt Circle Radius (in): 6 3/8 in - Bolt hole circle diameter (in): 12 3/4 in - Bolt Hole Circle Diameter (in): 12 3/4 in - Bolt Size (in): 5 in - Bore length (in): 7 7/8 in - Bore Length (in): 7 7/8 in - Bore size (in): 5 in - Bore Size (in): 5 in - Cage Material: Engineered Polymer - Clearance: C3 STANDARD - Distance between bolt holes (in): 6 3/8 in - Distance Between Bolt Holes (in): 6 3/8 in - Distance from housing cast face to inner ring long hub face (in): 1 5/32 in - Distance from Housing Cast Face to Inner Ring Long Hub Face (in): 1 5/32 in - Distance from mounting surface to end of pilot end (in): 4 29/32 in - Distance from Mounting Surface to End of Pilot End (in): 4 29/32 in - Distance from mounting surface to outer most bearing face (in): 2 31/32 in - Distance from Mounting Surface to Outer Most Bearing Face (in): 2 31/32 in - Fixed vs. Expansion: Fixed - Foot Height (in): 1.25 - Grease Fitting Thread Size: 1/4 NPT - Height: 8.50 - Housing Cast Face to Outermost Bearing Face (in): 1.16 - 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: 5500U - Length: 18.00 - Length Through Bore (in): 7.88 - Locking collar outside diameter (in): 7 1/16 in - Locking Collar Outside Diameter (in): 7 1/16 in - Locking device kit: SC13 QTY 2 - Locking Device Kit: SC13 QTY 2 - Locking Type: Double Set Collar - Lubrication type: EXXON RONEX MP STD - Lubrication Type: EXXON RONEX MP STD - Maximum Speed (RPM): 1600 rpm - Maximum Temperature (C): 107 C - Maximum Temperature (F): 225 F - Microlock kit: ML4 - Microlock Kit: ML4 - Mounting bolt size (in): 7/8 in - Mounting Bolt Size (in): 7/8 in - Mounting pad height (in): 1 1/4 in - Mounting Pad Height (in): 1 1/4 in - Mounting Surface to End of Housing (in): 4.91 - Net Weight: 125.00 - Pilot depth (in): 2 1/4 in - Pilot Depth (in): 2 1/4 in - Pilot diameter (in): 11 in - Pilot Diameter (in): 11 in - Primary seal: Steel clearance seal - Primary Seal: STEEL CLEARANCE SEAL - Radial Dynamic Load Capacity (lb): 191500 lb - Radial Static Load Capacity (lb): 241900 lb - Retainer material: Engineered Polymer - Retainer Material: Engineered Polymer - Seal kit: ZS13 - Seal Kit: ZS13 - Seal type: Labyrinth Seal - Seal Type: Labyrinth Seal - Series: Flanged Cartridge Blocks - Setscrew torque (in-lbs): 1350 in/lbs - Setscrew Torque (in-lbs): 1350 in/lbs - Size code: 13 - Size Code: 13 - Unit of dimension: in - Unit of Dimension: IN - Vibration frequency fundamental train: 0.0071 cps - Vibration Frequency Fundamental Train: 0.0071 cps - Vibration frequency inner ring defect: 0.1730 cps - Vibration Frequency Inner Ring Defect: 0.1730 cps - Vibration frequency outer ring defect: 0.1270 cps - Vibration Frequency Outer Ring Defect: 0.1270 cps - Vibration frequency roller spin: 0.0515 cps - Vibration Frequency Roller Spin: 0.0515 cps - Volume: 0.451 - Volume unit: Hectoliter - Volume Unit: Hectoliter - Weight unit: LB - Width: 18.00 ## 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 ZBR5500 Round Flange Cartridge Bracket 5" Bore Heavy Duty Spherical Roller Bearing - MROSupply.com`: - [Dodge 070700 FC-S2-108L flanged cartridge spherical roller bearing with 1-1/2" bore, set screw locking, and heavy-duty S-2000 design. Non-expansion fixed configuration for locating shaft position. Cast iron housing with Springlok collar and 65° setscrew spacing. Factory-sealed and lubricated with proven R seal for effective contaminant exclusion. Suitable for high-capacity applications requiring up to ±1° dynamic misalignment.](https://www.mrosupply.com/products/128877/as-markdown/) - [Rex ZBR2400 2000 series normal duty round flange cartridge bracket for mounted spherical roller bearings, 4 in (101.6 mm) bore, cast iron housing, single setscrew locking collar, standard clearance seal.](https://www.mrosupply.com/products/507807/as-markdown/) - [Rex ZBR2108 2000 series normal duty round flange cartridge bracket with 1-1/2 in (38.1 mm) bore. Cast iron housing with single setscrew locking collar and standard clearance seal. Designed for compact, rigid mounting applications.](https://www.mrosupply.com/products/507701/as-markdown/) - [Rex MBR21080646 ZBR2000 round flange cartridge bracket mounted spherical roller bearing, 1-1/2 in bore, normal duty 2000 series, cast iron fixed 4-bolt round flange cartridge block, single setscrew locking collar, spring-loaded heavy contact lip seal, C0 clearance, 2/3-3/4 grease fill.](https://www.mrosupply.com/products/504212/as-markdown/) - [Rex ZBR240082 2000 series normal duty round flange cartridge bracket with 4" bore. Fixed cast iron housing with single setscrew locking collar and standard clearance seal with Rexlon lined inner ring bore.](https://www.mrosupply.com/products/507814/as-markdown/) - [Rex ZB6303 6000 series heavy duty adapter mount round flange cartridge bearing with 3-3/16 in (80.96 mm) bore. Cast iron housing with standard clearance seal for high-load compact flange-mounted applications.](https://www.mrosupply.com/products/508093/as-markdown/) - [SKF F4BRP 108-SRB-SGH is a 1-1/2 inch shaft 4-bolt spherical-roller flange bearing unit. This inch-series piloted flange features a cast-iron housing with a spherical-roller insert for high radial load capacity and self-alignment. Suitable for heavy-duty industrial applications such as fans, conveyors, and material handling equipment.](https://www.mrosupply.com/products/6376198/as-markdown/) ## Product's reviews: - Great service-fast shipping - Awesome service. I would highly recommend doing business with MRO! Price was cheapest anywhere - Parts ordered - We were very happy with the parts we ordered. - Good - On time good - Mechanic - Great service and fast shipping and great quality of product. ## 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. - What is a bearing and what does it do?: A bearing is a mechanical component that enables smooth rotational or linear motion by reducing friction between moving parts. Bearings support loads and facilitate the transfer of forces between moving elements, preventing direct metal-to-metal contact that would cause wear and heat buildup. Rolling element bearings contain balls or rollers that rotate within races (raceways) to minimize friction. Common types include ball bearings (used for moderate loads and high speeds), roller bearings (used for heavy loads at medium speeds), and angular contact bearings (designed for combined radial and axial loads). Bearings are essential in industrial equipment including motors, pumps, compressors, gearboxes, turbines, and conveyor systems. - How do I choose the right bearing for my application?: Bearing selection depends on five key factors: 1. Load Type and Direction — Determine whether your application has radial loads (perpendicular to shaft), axial loads (along the shaft), or combined loads. Deep groove ball bearings suit primarily radial loads; tapered roller bearings excel at combined loads; thrust bearings handle pure axial forces. 2. Rotational Speed — Ball bearings support higher speeds with lower friction. Roller bearings are better for medium-speed, heavy-load applications. Verify bearing speed ratings against your operating RPM. 3. Load Capacity — Select a bearing with adequate load capacity for your application. Basic dynamic load rating (C) and basic static load rating (C₀) determine how much load the bearing can safely carry. 4. Lubrication Requirements — Choose between grease and oil lubrication based on speed, temperature, and load. High-speed or high-temperature applications typically require oil circulation; lower-speed applications can use grease. 5. Precision and Rigidity — Evaluate your application's tolerance for runout deviation. High-precision applications require tighter tolerances and higher-grade bearings. - What bearing materials are available and which should I use?: Standard bearing materials include: - Chrome Steel — Premium bearing steel used by SKF, NSK, Timken, and most manufacturers. Offers excellent hardness, fatigue resistance, and durability in standard industrial applications. Most common for ball and roller bearings. - Stainless Steel — Provides corrosion resistance for applications in wet, humid, or chemically corrosive environments. Used in food processing, marine, and pharmaceutical equipment. - Ceramic Hybrid Bearings — Combine steel races with ceramic rolling elements. Offer reduced friction, lower heat generation, and higher temperature capability. Used in high-speed, high-precision applications and aerospace. - Polymeric Bearings — Utilize fluoropolymer composites with embedded graphite or PTFE. Provide low friction in high-speed applications where lubrication film breakdown would be problematic. Material selection depends on operating environment (temperature, moisture, chemical exposure), speed, load, and precision requirements. Standard chrome steel bearings suit most industrial MRO applications. - What are dynamic and static load ratings, and why do they matter?: Static Load Rating (C₀) — The maximum load a stationary or slowly rotating bearing can support without permanent deformation of its rolling elements or raceways. Defined by ISO 76 as the load producing 0.01% permanent deformation of the rolling element diameter. Static load capacity is the limiting factor when a bearing operates at very low speeds or remains stationary under heavy loads. Dynamic Load Rating (C) — The constant load a bearing can endure for a specified number of revolutions (the L10 life, at which 90% of identical bearings are expected to survive). Dynamic load rating determines how long a bearing will last under rotating or oscillating motion. ISO 281 defines the L10 calculation using the formula: L10 = (C/P)^p, where C is dynamic load rating, P is equivalent dynamic load, and p is the life exponent (3 for ball bearings, 10/3 for roller bearings). Why They Matter — Static load rating determines if a bearing can handle peak loads without permanent damage (even if not rotating). Dynamic load rating determines operational life. For high-speed applications, dynamic rating is critical. For low-speed or stationary loads, static rating may be the limiting factor. Always verify both ratings against your application's load profile. - What is bearing life (L10) and how does it affect my equipment maintenance?: L10 Life Definition (ISO 281) — L10 is the basic rating life at which 90% of a large group of identical bearings are statistically expected to survive under constant load and speed. It is calculated in millions of revolutions using the formula: L10 = (C/P)^p, where C is the basic dynamic load rating, P is the equivalent dynamic bearing load, and p is the life exponent (3 for ball bearings). Converting L10 to Operating Hours — To express L10 life in hours: L10h = (L10 × 10^6) / (60 × n), where n is rotational speed in RPM. For example, a bearing with L10 = 1,000 million revolutions operating at 3,600 RPM has approximately L10h ≈ 4,630 hours. Modified Life (L10a) — Actual bearing life also depends on lubrication quality, contamination, speed, temperature, and bearing accuracy. ISO 281 defines a modified life factor (a₁ × aISO) that adjusts the theoretical L10 for these real-world conditions. High-quality lubrication and proper maintenance can extend bearing life significantly; poor lubrication or high contamination reduces it. Why It Matters for Maintenance — L10 life helps you schedule preventive maintenance, budget for bearing replacement, and select bearings adequate for your duty cycle. - How should I maintain and lubricate bearings?: Lubrication Importance — Improper lubrication causes over 40% of bearing failures. Proper bearing lubrication prevents friction damage, dissipates heat, protects against corrosion, and acts as a barrier against contaminants (dust, moisture, debris). Lubrication Selection — Choose between grease and oil based on: - Grease: Suitable for low-to-medium speed, sealed bearings, and applications without continuous circulation. Easier to apply and retain. Common for motors, household appliances, and sealed units. - Oil Mist or Circulating Systems: Better for high-speed applications, high-temperature environments, and heavy-load machinery where heat dissipation is critical. Best Practices: 1. Map all lubrication points and create a maintenance schedule. 2. Use the correct lubricant type and viscosity grade specified by the bearing manufacturer. 3. Store lubricants in sealed, labeled containers away from moisture and contaminants. 4. Monitor bearing temperature and vibration; unusual heat or noise may indicate inadequate lubrication or bearing wear. 5. Replace bearings before reaching L10 life if contamination or lubrication failure is detected.