# Rex ZFS511578 1-15/16" Square Flange Expansion Mounted Spherical Roller Bearing, 5000 Series Heavy Duty, Cast Iron, Double Setscrew Locking, Clearance Seal - MROSupply.com ***Rex ZFS511578 5000 series heavy duty mounted spherical roller bearing in a square flange expansion housing. Features a 1-15/16 in (49.21 mm) bore, cast iron 4-bolt flange block, double setscrew locking collar, and standard clearance seal with steel retainers.*** ## Product details: - Catalog number: 10409982 - SKU: 508560 - Price: ***$909.28*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Rexnord](https://www.mrosupply.com/brands/rexnord/) - Category: - [4-Bolt Flange](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/flanged-mounted-bearings/4-bolt-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: 12.800 lb - UPC: 793699507881 - 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 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): 2 7/8 in - Bolt Circle Radius (in): 2 7/8 in - Bolt hole circle diameter (in): 5 3/4 in - Bolt Hole Circle Diameter (in): 5 3/4 in - Bolt Size (in): 1.9375 in - Bore length (in): 3 13/16 in - Bore Length (in): 3 13/16 in - Bore size (in): 1.9375 in - Bore Size (in): 1.9375 in - Cage Material: Steel - Clearance: C3 STANDARD - Distance between bolt holes (in): 4 1/16 in - Distance Between Bolt Holes (in): 4 1/16 in - Distance from housing cast face to inner ring long hub face (in): 13/32 in - Distance from Housing Cast Face to Inner Ring Long Hub Face (in): 13/32 in - Distance from mounting surface to outer most bearing face (in): 15/32 in - Distance from Mounting Surface to Outer Most Bearing Face (in): 15/32 in - Expansion Capability (in): 0.38 - Expansion lock plug: 105-95008-27 - Expansion Lock Plug: 105-95008-27 - Fixed vs. Expansion: Expansion - Foot Height (in): 0.63 - Grease Fitting Thread Size: 1/8 NPT - Height: 5.50 - Housing Cast Face to Outermost Bearing Face (in): 0.69 - 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, Four Bolt - Housing Type: Flange, Four Bolt - Housing width (in): 5 5/16 in - Housing Width (in): 5 5/16 in - Inner Ring Outside Diameter (in): 2.307 - Insert: 5115UR78 - Length: 5.50 - Length Through Bore (in): 3.81 - Locking collar outside diameter (in): 2 7/8 in - Locking Collar Outside Diameter (in): 2 7/8 in - Locking device kit: SC6 QTY 2 - Locking Device Kit: SC6 QTY 2 - Locking Type: Double Set Collar - Lubrication type: EXXON RONEX MP STD - Lubrication Type: EXXON RONEX MP STD - Maximum Speed (RPM): 4050 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 - 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: 12.80 - Overall Length (in): 5.31 - Overall width: 5.31 - Primary seal: Steel clearance seal - Primary Seal: STEEL CLEARANCE SEAL - Radial Dynamic Load Capacity (lb): 28890 lb - Radial Static Load Capacity (lb): 33200 lb - Retainer material: Steel - Retainer Material: Steel - Rolling element: Spherical Roller - Seal kit: ZS6 - Seal Kit: ZS6 - Seal type: Labyrinth Seal - Seal Type: Labyrinth Seal - Setscrew torque (in-lbs): 325 in/lbs - Setscrew Torque (in-lbs): 325 in/lbs - Size code: 6 - Size Code: 6 - 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: 0.1617 cps - Vibration Frequency Inner Ring Defect: 0.1617 cps - Vibration frequency outer ring defect: 0.1217 cps - Vibration Frequency Outer Ring Defect: 0.1217 cps - Vibration frequency roller spin: 0.0559 cps - Vibration Frequency Roller Spin: 0.0559 cps - Volume: 0.54 - Volume unit: GLL - Volume Unit: GLL - Weight unit: LB - Width: 4.13 ## 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: - Great service - easy to do business with, competitive pricing, excellent service and quick shipping. - Excellent - very fast, very good!!! A+++ - Great service-fast shipping - Awesome service. I would highly recommend doing business with MRO! Price was cheapest anywhere - Jose - Really good customer service ## 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.