INA NA4902-XL-C3 Needle Roller Bearing 15x28x13mm C3

Traceable INA Sourcing — Every NA4902-XL-C3 batch ships with authorized distributor paperwork and lot-level traceability so procurement teams can close the loop on origin verification.

Technical Specifications

The XL suffix on this needle roller bearing has not been independently verified against the current INA catalog; please request manufacturer documentation to confirm its exact meaning for this production batch.

Application Suitability

What a Missing C3 Suffix Costs on a Compact Needle Roller Assembly

A standard CN clearance in a 15mm bore needle roller bearing will seize the cage within weeks when inner-ring heat expansion closes the internal gap.

I once watched a batch of NA4902 units ship without the C3 designation to a Middle East automotive workshop. The inner rings expanded under sustained thermal load and locked the needle cages solid, turning what should have been a routine replacement into a full shaft teardown. Clearance is never just a suffix printed on the box — it is the engineered gap that keeps the rolling elements free when temperatures climb [NEED_CITE: thermal expansion effects on bearing internal clearance]. When a cross-reference swap ignores that single letter, the downstream cost is never limited to the bearing itself.

Matching the INA NA4902-XL-C3 to High-Temperature, Compact-Envelope Applications

This INA NA4902-XL-C3 needle roller bearing delivers maximum radial load capacity inside a 15×28×13mm envelope, which matters when transmission housings and rocker-arm assemblies leave almost no room for larger rolling elements. The C3 clearance class accommodates thermal shaft growth in environments where sustained operating temperatures push inner-ring expansion beyond what standard clearance can absorb. Open construction allows external oil or grease to reach the needle cage directly, a deliberate choice for maintenance-accessible positions where re-lubrication intervals are part of the service schedule. When we cross-reference this model against SKF or FAG equivalents, we align clearance class, cage design, and dimensional envelope together rather than matching only the base number.

Load Spectrum, Speed, and Lubrication Realities on the Shop Floor

Radial loads on a 15mm needle roller bearing in transmission or rocker-arm service tend to be steady rather than shock-driven, but start-stop cycling introduces boundary lubrication moments where cage wear accelerates if grease starvation occurs. Speed is moderate in these positions, which keeps frictional heat manageable as long as the C3 gap prevents the needles from skating against a thermally expanded inner ring. Open design puts the burden of contamination exclusion on the housing seal, so workshop technicians must verify that lip seals or labyrinth guards are intact before pressing the bearing into service [NEED_CITE: contamination ingress failure modes in open needle roller bearings]. Mounting typically involves a cold press or a carefully controlled induction heater; overheating the thin outer cup during installation will distort the raceway and negate any clearance advantage.

Reading the Specs That Actually Move the Needle

The C3 radial internal clearance is the single most consequential parameter on this datasheet. It provides greater than normal internal gap, letting the inner ring expand radially under heat without crushing the needle cage — critical in automotive gearboxes where oil sump temperatures can exceed 90°C. The open, unsealed configuration trades contamination protection for direct lubricant access; in dirty environments the housing must do the sealing work. Single-row needle construction concentrates the full complement of rollers into one plane, maximizing load capacity per millimeter of width but demanding precise alignment during mounting because even slight skewing concentrates stress on the cage edges. The 15mm bore and 28mm outer diameter follow ISO 15 dimensional boundaries, meaning any cross-brand substitution must preserve these limits to avoid interference fits or housing bore mismatches.

The Hidden Cost of a Wrong-Suffix Swap

Substituting a CN-clearance NA4902 where C3 is specified does not produce an immediate failure — it produces a delayed one. The bearing runs fine at room temperature, then begins to bind as the shaft heats up, eventually welding the needles to the cage. Downtime on a transmission or agricultural driveline is rarely limited to the part; it cascades into missed planting windows or halted production runs. ISO 15243 classifies this failure mode as smearing and cage fracture triggered by insufficient clearance, not by material defect [NEED_CITE: ISO 15243 bearing failure classification]. Procurement teams that chase unit-price savings on unverified suffixes end up paying the real cost on the shop floor.

Why Sourcing Verification Matters at Every Step

We source the INA NA4902-XL-C3 needle roller bearing through authorized distributor channels, which means each batch carries traceable lot documentation rather than a generic packing slip. Our cross-reference database aligns clearance, cage material, and precision class simultaneously — not just the base designation — so a substitution request for an SKF or FAG equivalent returns a match that will actually survive in the same thermal and load environment. Country-of-origin paperwork is prepared before shipment, smoothing customs clearance for importers in regions where bearing provenance is scrutinized. When a client needs a Certificate of Conformity or dimensional inspection report, those documents travel with the carton rather than being requested after the fact. Authenticity guidance, including QR code verification pathways via official brand applications, is part of the standard handoff.

Documentation & Authenticity

• Supplier Certificate of Conformity (COC) tied to the specific INA NA4902-XL-C3 batch number, confirming origin through the authorized distributor chain
• Material certificate documenting steel grade and heat-treatment condition of inner and outer rings
• Third-party dimensional inspection report verifying bore, OD, and width against ISO 15 tolerances before dispatch
• Country-of-origin documentation formatted for import compliance in Middle East, African, and Latin American customs jurisdictions
• HS code and tariff classification support included in the shipping document package

Storage, Handling & Mounting

• Keep the INA NA4902-XL-C3 in its original sealed packaging until the moment of pressing; premature exposure invites moisture into the open needle cage where corrosion pits become stress risers
• Store below 25°C and away from direct sunlight; the thin-section outer cup on a 28mm OD needle roller bearing is especially susceptible to thermal distortion if stacked near heat sources
• Wear lint-free gloves during handling — fingerprint acids on the unshielded raceway of this open bearing initiate micro-corrosion that accelerates cage wear
• Mount with a controlled cold press or induction heater set to the manufacturer's recommended temperature; overheating the 15mm bore inner ring will collapse the C3 clearance advantage before the shaft ever turns
• After installation, verify that housing seals are intact and properly greased, since this open bearing relies entirely on external sealing to exclude abrasive contaminants

Request a Technical Review Before You Commit

Share your operating parameters — load profile, sustained temperature range, and housing seal condition — so we can confirm that the C3 clearance class and open configuration match your actual service environment. If you are replacing an existing bearing by OEM equipment number, provide that reference and we will run a full cross-reference check covering clearance, cage type, and dimensional envelope. Ask for the documentation package upfront: COC, material certificate, and origin paperwork can be reviewed before the purchase order is finalized. Confirm batch availability and lead time by sending your target quantity and destination port.

Frequently Asked Questions

Q: How can I verify that my INA NA4902-XL-C3 needle roller bearing is genuine? A: Scan the QR code on the packaging using the official INA/FAG brand application. The app cross-references the batch number against the manufacturer's production database. We also supply authorized distributor chain documentation so the procurement trail is transparent from factory gate to your receiving dock.

Q: What does C3 clearance mean, and when is it required on a needle roller bearing? A: C3 indicates greater than normal radial internal clearance. It is required when operating temperatures cause the inner ring to expand enough to reduce the internal gap below the minimum needed for free needle rotation — common in automotive transmissions, agricultural drivelines, and any application where sustained heat builds up around the shaft.

Q: Can I cross-reference the INA NA4902-XL-C3 with an SKF or FAG equivalent? A: Yes, but the match must cover more than the base number. Clearance class (C3), open seal configuration, and single-row needle arrangement all need to align. We run a full parameter comparison against SKF and FAG catalogs so the substitute will perform identically in your housing.

Q: What is the XL suffix on this bearing, and does it affect interchangeability? A: The XL suffix has not been independently verified against the current INA catalog. We recommend requesting the manufacturer's official specification sheet for this production batch before finalizing a cross-reference swap, as suffix variations can affect material or dimensional details not captured in the base designation.

Q: What documentation will I receive with my order? A: Each shipment includes a Certificate of Conformity, material certificate, dimensional inspection report, batch traceability records, and country-of-origin documentation. HS code and import support materials are available on request for customs clearance in your destination market.

Confirm Your INA NA4902-XL-C3 Specification and Lead Time

Send us your operating conditions and target quantity to start the technical review and cross-reference verification process.

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