# Dodge 129768 FC-GTM-207 4-Bolt Piloted Flange Bearing 2-7/16" Bore Grip Tight Medium Duty - MROSupply.com ***Dodge 129768 FC-GTM-207 4-bolt piloted flange bearing with 2-7/16" bore, Grip Tight adapter mount, and medium duty cast iron housing. Grip Tight locking provides 360° shaft contact without marring. DualGuard seals with flingers retain lubrication and exclude contaminants. Wide inner ring ball bearing insert supports radial and thrust loads. Non-expansion design for fixed shaft positioning. Maximum speed 5000 rpm. Relubrication enabled for extended service life.*** ## Product details: - Catalog number: FC-GTM-207 - SKU: 127777 - Price: ***$476.16*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Dodge](https://www.mrosupply.com/brands/dodge/) - Category: - [Piloted Flange](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/flanged-mounted-bearings/piloted-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: 12.370 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 - Bearing type: Ball, ball - Bolt circle: 2.3900 in, 60.706 mm - Bore: 2 7/16 in - Bore Diameter: 2-7/16" - Bore length: 2.3900 in, 60.706 mm - Configuration: Non-expansion (fixed) bearing - Duty: Medium duty - Duty Rating: Medium duty - Expansion: No - Expansion capability: Non-expansion (fixed) - Finish: Uncoated - Greasable: Yes - High temp: No - Housing construction: Solid - Housing material: Cast iron - Housing Material: Cast iron - Housing option: Cast iron - Housing type: Piloted flange - I.D.: 2 7/16 in - Insert material: Steel - Insert option: Bearing steel - Insert type: Ball Bearing - Locking: Grip tight - Lubrication type: Grease - Max RPM: 5000 rpm - Pilot depth: 1.1300 in, 28.702 mm - Pilot diameter: 5.5000 in, 139.7 mm - Relubrication: Yes - Rolling element: Medium duty ball - Seal option: DualGuard seals with flingers - Sealing: DualGuard seals - Sensor ready: Adapter required - Shaft: Nitrile rubber - Shaft attachment: Push-pull adapter - Shaft diameter: 2.4375 in - Standoff housing: No - Suitable for high temperature: No - Suitable for washdown: No - Type: 4-bolt piloted flange ## Product documents / software: - [Brochure](https://documents.mrosupply.com/product_documents/12/77/127777/337157_8GgqdcB.pdf) - [Instruction Manual](https://documents.mrosupply.com/product_documents/12/77/127777/337158_UvhcNOw.pdf) - [2D DXF front](https://documents.mrosupply.com/product_documents/12/129768/baldor2d_129768_front_KdAHgQP.dxf) - [2D DXF right](https://documents.mrosupply.com/product_documents/12/129768/baldor2d_129768_right_ML3wwow.dxf) - [2D DXF top](https://documents.mrosupply.com/product_documents/12/129768/baldor2d_129768_top_it50nW2.dxf) - [3D DXF](https://documents.mrosupply.com/product_documents/12/129768/baldor_dxf3d_129768_wm3ZK7j.dxf) - [3D PDF Datasheet](https://documents.mrosupply.com/product_documents/12/129768/baldor_pdf_129768_36JWUfq.pdf) ## Product's reviews: - Oem parts - I was repairing a piece of equipment and wanted the same bearings that were removed. MRO Supply had the OEM bearings at a reduced cost. Shipped and received in a timely manner. - Bearings - Order arrived on time, could have been packed a little tighter as the boxes the bearings came in were tore up. All is good as i used all of them instead of leaving them set in inventory. - Purchase review - I received quick replies to any questions; delivery was on time and immediate. I am very satisfied with my experience with MRO Supply. - Great - great ## FAQ: - How much grease is in a Dodge bearing out of the box?: Most standard Dodge bearings ship with a 33–35% factory grease fill. Washdown bearings ship 100% full; Harsh Duty ball bearings ship at 66%. All are shaft-ready out of the box — no pre-lube needed before installation. - What grease do Dodge bearings come with from the factory?: Standard Dodge mounted bearings ship shaft-ready with an NLGI #2 lithium-based grease. Ball bearing inserts are factory-filled with Mobil Unirex N2 (a lithium complex grease); roller bearings get a heavier grease, Mobil XHP 222. Bearings can also be ordered dry, or with a special grease, if your plant runs its own lubrication standard. - Which Dodge bearings hold up on sand-and-gravel conveyors with regular washdown?: Dodge's Harsh Duty series (formerly the Defender series) was designed for aggregate duty. It's a seal upgrade over the standard product with identical mounting dimensions, so it drops into your existing footprint: Harsh Duty versions exist for Type E and TAF tapered-roller pillow blocks and for ball bearings (ED suffix). The tapered line carries a one-year performance guarantee against solid-particle-contamination failure when commissioned with a Dodge IntelliLube automatic lubricator. - How do I keep water out of a bearing on a wet shaft (washers, washdown conveyors)?: Three factory-recommended angles: a more robust multi-lip seal option for the housing where one exists; Dodge's modern SAF-style mounted bearing, which installs faster than a traditional SAF assembly and seals better; and continuous lubrication with an automatic lubricator (IntelliLube), which keeps a positive grease purge at the seal so water is pushed out instead of drawn in. - How does Dodge warranty evaluation work if a product fails?: Failed units go to Dodge's US plants for evaluation — about a week in transit plus one to two weeks of analysis, and you get the findings either way. Warranty covers workmanship and material defects; failures caused by the application (lubrication, installation) fall to the customer, but the failure analysis tells you the root cause so it doesn't repeat. - 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. - 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. - 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. - 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. - 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 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 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.