DODGE 070492 F3R-S2-107L

The name runs housing, bearing type, size, seal, then expansion. P2B and P4B are 2-bolt and 4-bolt cast iron pillow blocks, F4B a 4-bolt flange, FC a piloted flange and S1U an S-1 unit. The type is E (Type E), K (Type K), DI (Double-Interlock), TAF, S2 (S-2000) or IP (Imperial). Size is inches and sixteenths, so 207 is 2-7/16 in, or millimetres with an M (060M). R is the rubbing contact seal, L a labyrinth seal on S-2000 and Imperial, and T the E-Tect seal. On lines with an expansion option, a final E means an expansion bearing, so Imperial uses R, RE, L and LE. Type E units do not use the E expansion suffix or the L and LE labyrinth options.

Type E, along with Type K, Double-Interlock and TAF, uses tapered roller bearings that take any combination of radial and thrust load. They lock to the shaft with 65 degree setscrew collars and ship preassembled, prelubricated and factory adjusted. S-2000 is a double-row spherical roller insert held by a 65 degree Springlok collar. Imperial (IP) is also a double-row spherical roller bearing, but it mounts on Dodge's patented push/pull tapered adapter instead of setscrews, giving a concentric grip with less fretting corrosion and vibration.

Imperial uses a patented push/pull adapter. Turning the locknut clockwise pushes the tapered sleeve between the shaft and inner race; the nut is then turned a set number of further turns to reduce internal clearance, so no feeler gauges are needed, and a lock plate holds it. Turning the nut counterclockwise draws the sleeve back out. Dodge says the system can be installed or removed in about 15 minutes, commercial shafting is acceptable, and units are field convertible between expansion and non-expansion.

Type K, Double-Interlock and TAF pillow blocks, and Type K and Double-Interlock flanges, have split outer housings around a completely assembled, lubricated and adjusted inner unit, which simplifies replacing the bearing in place. Type EXL also uses split ductile iron housings with a replaceable inner unit, sold as S-1 units such as S1U-EXL-104R for a 1-1/4 in shaft. Standard Type E mounted bearings have solid one-piece housings, so they are normally replaced as a complete unit.

Several Dodge lines share the industry standard Type E mounting dimensions. E-S2000 puts the S-2000 spherical insert in a housing interchangeable with Type E pillow blocks and flanges (Regal Rexnord ZEP and MEP units are its closest equivalents), and Imperial-E does the same for the Imperial adapter bearing. Type EXL is Type E dimensioned and Dodge lists it as a drop-in replacement for Sealmaster RPB and RFB units, with up to 4 degrees misalignment in pillow blocks and 3 degrees in flanges. Imperial IP fits Dodge S-2000 housings, and Imperial ISAF interchanges with Dodge USAF and many competitive SAF pillow blocks.

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.

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.

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.

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.

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.

Set screw locking uses two set screws spaced 120 degrees apart to secure the bearing onto the shaft, suitable for low-to-moderate speed applications. Eccentric collar locking uses an offset design to create a clamping force that strengthens during rotation and must be locked in the direction of shaft rotation to prevent loosening.

3-bolt flange bearings are available in bore sizes ranging from 1/2 inch to 2 inches, with common sizes including 5/8" (UCFB-202), 3/4" (UCFB-204), 1" (UCFB-205), 1-1/4" (UCFB-207-20), 1-3/8" (UCFB-207-22), 1-7/16" (UCFB-207-23), and 1-3/4" (UCFB-209). Custom sizes larger than 2 inches are available through manufacturers.

A 3-bolt flange bearing (UCFB series) is a mounted ball bearing unit with a triangular cast iron housing featuring three bolts for mounting. The housing contains a self-aligning ball bearing that compensates for minor shaft misalignment while supporting radial loads in industrial applications.

Most 3-bolt flange bearings feature dual rubber lip seals with flinger rings on the inner race to deflect contaminants away from the bearing. Standard models come pre-lubricated and include a grease fitting, allowing for periodic relubrication without disassembly during maintenance intervals.

3-bolt flange bearings are used in conveyors, fan and blower assemblies, food processing equipment, construction machinery, and HVAC systems. Their self-aligning design and sealed housings make them ideal for dusty or moist industrial environments where maintenance access is limited.

Dynamic load rating applies to continuous rotation with varying loads, while static load rating represents the maximum load the bearing can handle without permanent deformation when stationary. Select a bearing whose ratings exceed your application's actual loads with an appropriate safety margin.

You must specify the bore diameter (inner diameter), outer diameter, and bearing width, plus the flange outer diameter and flange width for proper housing fit. These dimensions determine whether the bearing will seat correctly and handle the intended loads without interference.

Common locking methods include set screws, eccentric collars, and adapter sleeves, each suited to different shaft sizes and mounting requirements. Your choice depends on the shaft diameter tolerance and whether you need quick-change capability.

Maximum permissible speed depends on bearing size, load, and sealing type; exceeding it causes excessive heat generation and lubricant breakdown. Verify the bearing's speed rating against your actual RPM before selection, accounting for any speed fluctuations in your drive system.

Flanged bearing housings offer various sealing configurations—open designs, contact seals, and non-contact shields—to match your environment's contamination risk. Higher-protection seals increase friction and heat generation, so choose the minimum seal level your application requires.

Align the bearing housing parallel to the shaft using a straightedge or dial indicator—misalignment is a leading cause of premature wear. Tighten mounting bolts in a cross pattern to seat the housing evenly. Use a soft mallet to tap the bearing unit into place; never force it. Check alignment after installation.

2-bolt (diamond) flanges fit tight spaces and light-to-moderate loads. Switch to 4-bolt (square) flanges for cantilevered (overhung) loads, torque reversal, or shafts over 50mm—the extra bolts distribute load more evenly and resist side thrust better.

Use the bearing manufacturer's recommended grease grade and relubricate at intervals matched to your speed and load—heavy-duty applications may need monthly service, while light-duty runs can extend to 6–12 months. Over-greasing creates drag and heat; under-greasing causes metal-to-metal contact. Wipe off excess grease to prevent contamination.

Pillow blocks mount parallel to the shaft (shaft runs horizontally along the base), while flange blocks mount perpendicular to the shaft (shaft extends out from the face). Choose pillow blocks for shafts that are level with your mounting surface; choose flange blocks when the shaft is perpendicular to your mount point.

Match the bore diameter to your shaft size, then verify the dynamic load rating (C) exceeds your expected radial load. For radial loads, use C ≥ 3× your maximum load as a conservative starting point. Check speed rating against your RPM—pillow blocks typically handle 3,000–4,000 rpm while flange units can push 5,000+ rpm depending on bolt strength and bearing series.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.