# Dodge 124479 TB-SC-108 Tapped-Base Pillow Block Bearing 1-1/2" Bore Set Screw Standard Duty 208 Series Non-Expansion Cast Iron - MROSupply.com ***Dodge 124479 TB-SC-108 tapped-base pillow block bearing with 1-1/2" bore, set screw locking, standard duty 208 series ball bearing insert. DualGuard seals with flingers, cast iron housing, powder coated finish. Suitable for general industrial applications; maximum speed 5000 rpm. Relubricatable design.*** ## Product details: - Catalog number: TB-SC-108 - SKU: 125208 - Price: ***$161.71*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Dodge](https://www.mrosupply.com/brands/dodge/) - Category: - [Tap Based Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/tap-based-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: 4.500 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: 208 series - Base to center height: 1.9400 in, 49.276 mm - Bearing Series: 208 series ball bearing insert - Bearing type: Ball, ball - Bolt Diameter: 0.5000 in - Bolt to bolt max: 3.5000 in, 88.9 mm - Bolt to bolt min: 3.5000 in, 88.9 mm - Bore: 1 1/2 in - Bore Diameter: 1-1/2 inch - Bore length: 1.9400 in, 49.276 mm - Duty: Standard Duty - Duty Rating: Standard duty - Expansion: No - Expansion capability: Non-expansion (fixed) - Expansion Type: Non-expansion (fixed) - Finish: Powder coated - Greasable: Yes - High temp: No - Housing construction: Solid - Housing material: Cast iron - Housing Material: Cast iron - Housing option: Cast iron - Housing type: Tapped-base pillow block - Housing Type: Tapped-base pillow block - I.D.: 1 1/2 in - Insert material: Steel - Insert option: Bearing steel - Insert type: Ball Bearing - Locking: Set screw - Lubrication type: Grease - Material: Steel - Max RPM: 5000 rpm - Max Speed: 3500 RPM - Relubrication: Yes - Rolling element: Standard duty ball - Seal: Single lip - Seal option: DualGuard seals with flingers - Sealing: DualGuard seals - Sensor ready: Adapter required - Shaft attachment: Setscrew - Shaft diameter: 1.5000 in - Standoff housing: No - Static load capacity: 4475 lbf, 19905.792 N - Suitable for high temperature: No - Suitable for washdown: No - Type: Tap based ## Product documents / software: - [Accessories](https://documents.mrosupply.com/product_documents/12/123858/Setscrew_Ball_Bearings_Accessories_Related_Products.pdf) - [Brochure](https://documents.mrosupply.com/product_documents/12/52/125208/331910_wqeyBvR.pdf) - [Dimensions](https://documents.mrosupply.com/product_documents/12/124462/Setscrew_Ball_Bearings_Tapped_Base_Selection_Dimensions.pdf) - [Features](https://documents.mrosupply.com/product_documents/12/123858/Setscrew_Ball_Bearings_Features.pdf) - [Instruction Manual](https://documents.mrosupply.com/product_documents/12/52/125208/331913_SdspCQp.pdf) - [Nomenclature](https://documents.mrosupply.com/product_documents/12/123858/Setscrew_Ball_Bearings_How_to_Order_Nomenclature.pdf) - [Selection](https://documents.mrosupply.com/product_documents/12/123858/Setscrew_Ball_Bearings_Easy_Selection.pdf) - [2D DXF front](https://documents.mrosupply.com/product_documents/12/124479/baldor2d_124479_front_0fpeAZk.dxf) - [2D DXF right](https://documents.mrosupply.com/product_documents/12/124479/baldor2d_124479_right_7RUjYQT.dxf) - [2D DXF top](https://documents.mrosupply.com/product_documents/12/124479/baldor2d_124479_top_gSRdMn7.dxf) - [3D DXF](https://documents.mrosupply.com/product_documents/12/124479/baldor_dxf3d_124479_fAthAd0.dxf) - [3D PDF Datasheet](https://documents.mrosupply.com/product_documents/12/124479/baldor_pdf_124479_aqzjMc9.pdf) ## Alternate products to `Dodge 124479 TB-SC-108 Tapped-Base Pillow Block Bearing 1-1/2" Bore Set Screw Standard Duty 208 Series Non-Expansion Cast Iron - MROSupply.com`: - [Browning VPS-112 767676 2-bolt pillow block mounted ball bearing with a 1-3/4-inch bore and set screw locking. The cast iron housing supports a relubricable single-row deep-groove ball bearing insert with a contact seal. Suitable for conveyor head shafts, fan supports, and general industrial machinery.](https://www.mrosupply.com/products/2271865/as-markdown/) - [SealMaster NP-12 700176 2-bolt pillow block bearing with 3/4" bore, set screw lock, and felt-labyrinth seal. Cast iron housing with 52100 bearing steel insert and black oxide coating. Pre-lubricated for general industrial applications.](https://www.mrosupply.com/products/421825/as-markdown/) - [SealMaster TB-23 700877 tap-based mounted bearing with 1-7/16" bore, set screw lock, and felt-labyrinth seal. Cast iron tapped base pillow block houses a 52100 bearing steel insert with black oxide coating. Pre-lubricated for general industrial applications.](https://www.mrosupply.com/products/2259601/as-markdown/) - [SealMaster TB-20 700874 tap-based mounted bearing with 1-1/4" bore, set screw locking, and felt-labyrinth seal. Cast iron tapped base pillow block housing with 52100 bearing steel insert and black oxide coating. Pre-lubricated Gold Line unit for compact base-mounted industrial applications.](https://www.mrosupply.com/products/2259596/as-markdown/) - [SealMaster TB-24T 705553 tap-based mounted bearing with 1-1/2" bore, cast iron tapped base pillow block housing. Features 52100 bearing steel insert with black oxide coating, SKWEZLOC concentric locking, and felt-labyrinth seal. Pre-lubricated for general industrial applications.](https://www.mrosupply.com/products/2259609/as-markdown/) - [SealMaster TB-31T 705557 tap-based mounted bearing with 1-15/16" bore, cast iron tapped base pillow block housing. Features 52100 bearing steel insert with black oxide coating, SKWEZLOC concentric locking, and standard felt seal. Pre-lubricated for general industrial applications.](https://www.mrosupply.com/products/2259621/as-markdown/) - [SealMaster TB-23T 705552 tap-based mounted bearing with 1-7/16" bore, cast iron tapped base pillow block housing. Features 52100 bearing steel insert with black oxide coating, SKWEZLOC concentric locking, and felt labyrinth seal. Pre-lubricated for general industrial applications.](https://www.mrosupply.com/products/2259603/as-markdown/) - [AMI UCTB208-24 tapped base pillow block bearing with 1-1/2" bore, set screw locking, and wide inner ring. Cast iron housing with chrome steel insert for normal duty applications. 200 series bearing unit.](https://www.mrosupply.com/products/16016/as-markdown/) ## Suggested products: - [Dodge 054548 TB-SC-111 tapped-base pillow block bearing with 1-11/16" bore, set screw locking, cast iron housing, and DualGuard seals with flingers. Standard duty 209 series non-expansion ball bearing insert for general industrial applications. Relubricatable design with bearing steel insert.](https://www.mrosupply.com/products/125211/as-markdown/) - [Dodge 124205 F4B-SC-103 four-bolt flange mounted ball bearing with 1-3/16" bore, set screw locking, standard duty, non-expansion design. Cast iron housing with powder coated finish, DualGuard seals with flingers, and relubrication capability. Maximum speed 6500 rpm. 206 series insert for general purpose applications.](https://www.mrosupply.com/products/123311/as-markdown/) - [Dodge 114464 Type E Quick Disconnect (QD) bushing with 80mm finished bore. Ductile iron (class 65) construction rated for 20,000 lbf torque. Features 3-bolt flange, 22 x 14 keyway, and 2.63 in bore length. For high-torque shaft mounting in industrial power transmission applications.](https://www.mrosupply.com/products/5003106/as-markdown/) - [Dodge 124478 TB-SC-115 tapped base pillow block bearing with 1-15/16" bore, 65° set screw locking, cast iron housing, normal duty, 210 series. DualGuard seal with flingers. Threaded mounting holes for base attachment. Relubricatable. Maximum 4500 rpm.](https://www.mrosupply.com/products/130862/as-markdown/) - [Dodge 124479 TB-SC-108 tapped-base pillow block bearing with 1-1/2" bore, set screw locking, standard duty 208 series ball bearing insert. DualGuard seals with flingers, cast iron housing, powder coated finish. Suitable for general industrial applications; maximum speed 5000 rpm. Relubricatable design.](https://www.mrosupply.com/products/125208/as-markdown/) ## Product's reviews: - Bearring - Perfect - Director - Great costumer care - Great - Good price and excellent delivery - Dodge conveyor bushings - The right part, in stock, easy to find, quickly shipped. ## FAQ: - 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. - 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. - 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. - 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. - 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. - When should I use ball bearings versus roller bearings in tapped base pillow blocks?: Ball bearings in tapped base units are best for lighter radial loads and higher-speed applications, typically 1,000–3,000 RPM and above. Roller bearings are preferred for heavier loads and lower speeds (under 1,500 RPM) where shock loads or extended radial load capacity is needed. - What is a tapped base bearing, and how does it differ from other pillow block mountings?: A tapped base bearing is a pillow block unit with pre-drilled, internally threaded holes in its base that allow direct bolt attachment to machine frames without requiring separate nuts. This design provides a compact, secure mounting solution compared to standard pillow blocks that use through-holes with external nuts. - What maintenance routine should I follow for tapped base bearings?: Periodically inspect for unusual noises, vibrations, or heat; check mounting bolt tightness and retighten if needed without over-torquing. Monitor operating temperature regularly, and watch for signs of wear, contamination, or inadequate lubrication. - How do I properly install and secure a tapped base pillow block bearing?: First, ensure the mounting surface is clean, flat, and perpendicular to the shaft. Insert bolts through the tapped holes and tighten securely using the manufacturer-specified bolt size and torque—avoid over-tightening, which can distort the housing. Use the set screws to lock the bearing insert to the shaft. - What load safety factor should I use when selecting a tapped base bearing?: For smooth, steady loads, ensure the dynamic load rating exceeds the actual radial load by at least 1.5×. For shock or impact loads, use a safety factor of 2.0–3.0× the actual load to prevent premature bearing failure. - What temperature should a mounted bearing run at?: Monitor housing surface temperature (the standard MRO measurement point): 40–65°C is normal, 70–75°C warrants investigation of misalignment or over-greasing, and 80°C requires immediate shutdown. The inner race runs 15–30°C hotter than the housing surface, so an 80°C housing reading means lubricant degradation is accelerating and the bearing requires emergency diagnosis. - What are the main types of mounted bearings?: Mounted bearings come in four main forms: pillow blocks (flat-base, shaft parallel to mounting surface), flange mounts (perpendicular shaft, available in 2-bolt and 4-bolt variants with different radial ratings), hanger bearings (overhead support for long horizontal shafts), and take-up frames (adjustable center-distance units for belt or chain drive tensioning). Select based on your shaft orientation, load direction, and space constraints. - How do I install a mounted bearing correctly?: Verify your shaft diameter is within the bearing bore tolerance (consult the NSK or SKF datasheet), then secure the bearing to the mounting surface using the specified bolt torque and engage the locking collar or set-screw on the shaft to prevent axial slip. Hand-rotate the shaft through several complete turns with a dial indicator, laser alignment tool, or feeler gauge to confirm smooth operation and proper shaft runout within spec. - How often should I grease a mounted bearing?: Use the formula (OD in mm) × (Width in mm) × 0.005 = grams for periodic relubrication of the bearing element only; initial housing cavity fill is separate and should be 30–50% of free volume. Over-greasing damages seals and generates excess heat—stick to the calculated quantity and recommended relubrication schedule. - When should I replace a mounted bearing?: Replace based on condition: vibration signature analysis or ultrasonic emission (detected with a hand-held meter) indicates wear hours or days before audible noise appears, and is the actionable MRO signal. Other replacement triggers include continuous operation above 80°C housing temperature, visible grease leakage, or reaching the manufacturer's service interval for your duty cycle. Scheduled relubrication and temperature monitoring extend service life significantly — replacement is a last resort, not preventive maintenance. - 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 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 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 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. - 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 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.