# Dodge 128777 F4B-DL-015 Four-Bolt Flange Bearing 15/16" Bore D-Lok Concentric Collar - MROSupply.com ***Dodge 128777 F4B-DL-015 four-bolt flange mounted ball bearing with 15/16" bore and D-Lok concentric collar locking. Standard duty, 205 series, non-expansion fixed bearing for shaft positioning. Cast iron housing with DualGuard seals and flingers, relubrication capable. General purpose application.*** ## Product details: - Catalog number: F4B-DL-015 - SKU: 132441 - Price: ***$117.00*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Dodge](https://www.mrosupply.com/brands/dodge/) - Category: - [4-Bolt Flange](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/flanged-mounted-bearings/4-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: 2.180 lb - Technicall support: contact supplier for technical support on +1-864-284-5700 ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - Application: General Purpose - Ball bearing series: 205 series - Bearing type: Ball, ball - Bolt Diameter: 0.4375 in - Bolt to bolt max: 2.7500 in, 69.85 mm - Bolt to bolt min: 2.7500 in, 69.85 mm - Bore: 15/16 in - Bore Diameter: 15/16" with 205 series ball bearing insert - Bore length: 1.4400 in, 36.576 mm - Duty: Standard Duty - Duty Rating: Standard duty - Expansion: No - Expansion capability: Non-expansion (fixed) - Expansion Type: Non-expansion (fixed) bearing - Greasable: Yes - High temp: No - Housing: Polymer - Housing construction: Solid - Housing material: Cast iron - Housing Material: Cast iron - Housing option: Cast iron - Housing type: Four-bolt flange - Housing Type: Four-bolt flange mount - I.D.: 1 1/4 in - Insert material: Steel - Insert option: Bearing steel - Insert type: Ball Bearing - Locking: Concentric collar - Lubrication type: Grease - Max Speed: 7500 rpm - Relubrication: Yes - Rolling element: Standard duty ball - Seal option: DualGuard seals with flingers - Sealing: DualGuard seal system - Sensor ready: Adapter required - Shaft attachment: Clamp collar - Shaft diameter: 0.9375 in - Standoff housing: No - Static load capacity: 1769 lbf, 7868.904 N - Suitable for high temperature: No - Suitable for washdown: No - Type: 4-bolt flange ## Product documents / software: - [Dimensions ](https://documents.mrosupply.com/product_documents/12/128778/B6_34-35.pdf) - [Instruction Manual](https://documents.mrosupply.com/product_documents/13/24/132441/304307_xhWU4Tl.pdf) - [2D DXF front](https://documents.mrosupply.com/product_documents/12/128777/baldor2d_128777_front_3y6ZmQj.dxf) - [2D DXF right](https://documents.mrosupply.com/product_documents/12/128777/baldor2d_128777_right_Np3VyWE.dxf) - [2D DXF top](https://documents.mrosupply.com/product_documents/12/128777/baldor2d_128777_top_GfhAWdt.dxf) - [3D DXF](https://documents.mrosupply.com/product_documents/12/128777/baldor_dxf3d_128777_IJOXueI.dxf) - [3D PDF Datasheet](https://documents.mrosupply.com/product_documents/12/128777/baldor_pdf_128777_PlV3K2H.pdf) ## Alternate products to `Dodge 128777 F4B-DL-015 Four-Bolt Flange Bearing 15/16" Bore D-Lok Concentric Collar - MROSupply.com`: - [Browning VPLS-116 767739 2-bolt low-base pillow block mounted ball bearing with a 1-inch bore and set screw locking. The cast iron housing supports a relubricable single-row deep-groove ball bearing insert with a single lip contact seal. Suitable for conveyor head shafts, fan supports, and general industrial machinery.](https://www.mrosupply.com/products/2271847/as-markdown/) - [Browning VPLE-116 767777 2-bolt pillow block mounted ball bearing with a 1-inch bore and eccentric locking collar. The cast iron low-base extended housing supports a relubricable 52100 bearing steel insert with a single-lip contact seal. Suitable for conveyor head shafts, fan supports, and general industrial machinery.](https://www.mrosupply.com/products/2271828/as-markdown/) - [Link-Belt PL3S216E 10421683 2-bolt pillow block ball bearing with 1" bore, set screw locking, and cast iron housing. This intermediate-duty mounted ball bearing features a single lip contact seal, nylon retainer, and C3 internal clearance. 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Pre-lubricated for general industrial applications.](https://www.mrosupply.com/products/2255021/as-markdown/) ## Suggested products: - [Dodge 123803 P2B-SC-012 two-bolt pillow block ball bearing with 3/4" bore, 65° set screw locking, standard duty rating, cast iron housing, DualGuard seals with flingers, 204 series insert, non-expansion design. Powder coated finish for general purpose applications. Maximum speed 7500 rpm. Relubrication enabled.](https://www.mrosupply.com/products/123363/as-markdown/) - [Dodge 128721 P2B-DLB-012 two-bolt pillow block bearing with 3/4" bore, D-Lok concentric collar locking, standard duty cast iron housing, non-expansion fixed design, DualGuard seals with flingers, 204 series ball bearing insert, 5500 rpm maximum speed, powder coated finish, relubrication enabled, general purpose application.](https://www.mrosupply.com/products/125623/as-markdown/) - [Dodge 079711 P2B-DL-20M-HTS two-bolt pillow block bearing with 20mm bore, D-Lok concentric collar locking, non-expansion design, cast iron housing, 204 series ball bearing, DualGuard seal with flingers, high temperature rated for general purpose applications.](https://www.mrosupply.com/products/2218137/as-markdown/) - [Dodge 123595 P2B-VSCB-012 two-bolt pillow block bearing with 3/4" bore, intermediate duty set screw locking, 204 series ball bearing, cast iron housing, non-expansion (fixed) design, DualGuard seals with flingers, 7500 rpm maximum speed.](https://www.mrosupply.com/products/126948/as-markdown/) - [Dodge 052012 P2B-SC-012-NL two-bolt pillow block bearing with 3/4" bore, 65° set screw locking, cast iron housing, standard duty ball bearing insert, and DualGuard seals with flingers. No-lube sealed design for maintenance-free operation in general purpose applications. Non-expansion fixed bearing with powder coated finish.](https://www.mrosupply.com/products/123364/as-markdown/) ## Product's reviews: - Perfect fit and finish - Good product, perfect fit and finish, good price and fast shipping. Thanks - Thanks mro - Right part fast shipping. Thanks - Prompt & great service - As usual MRO Supply team are quick in shipping the ordered parts correctly without any delay.. Will shop online again confidently knowing they offer very good and prompt service! - Recent purchase - My order with MRO was easy, quick and priced just right! Assistance over the phone was professional and helpful. I will be making more orders in the future. JG ## 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.