INA NK35/30-TV-XL Needle Roller Bearing 35x45x30mm Genuine

Channel-Traceable Sourcing — Every INA NK35/30-TV-XL needle roller bearing we ship carries batch-level documentation traceable back to authorized INA distributor records, not secondary market transfers.

Technical Specifications

Note: The "-XL" suffix appears in the product identifier but its specific meaning remains unverified against the manufacturer catalog — confirm with INA documentation before final specification lock.

Application Suitability

Why a Missing Cage Suffix Wrecks a Needle Roller Assembly

Polyamide cages fail silently under heat, but steel cages fail loudly under vibration — confusing the two on an NK35/30-TV-XL means you discover the mismatch only after the equipment stops.

I once sourced what I thought were identical replacements for a conveyor tension roller. The base number matched perfectly, the supplier shipped fast, and the packaging looked right. Three weeks later, steel-caged units cracked under continuous vibration that polyamide cages had handled for years. The needles scored the hardened shaft surface, and that shaft had to be reground before the line ran again. The downtime cost dwarfed the bearing cost many times over.

That failure pattern repeats across industries whenever procurement focuses on the base designation and treats suffixes as optional decoration. Counterfeit bearings complicate the picture further — soft inner rings with cloned markings pass visual inspection but deform under radial load, shifting the needle contact angle and accelerating cage wear. [NEED_CITE: rolling bearing failure mode classification per ISO 15243]

Where Compact Radial Envelopes Demand This Geometry

The INA NK35/30-TV-XL needle roller bearing operates without an inner ring, which means the shaft itself becomes the inner raceway. This design maximizes radial load capacity within a tight 35mm bore to 45mm OD envelope — ideal for applications where housing space is constrained but load demands are not negotiable.

Transmission designers and automotive repair shops use this arrangement when the shaft can be hardened to at least HRC 58 and ground to a surface finish of Ra 0.4 or better. The polyamide cage keeps weight low and friction minimal, which matters at the moderate speeds typical of these applications. We regularly cross-reference this geometry against competing designs to verify that clearance, cage material, and precision class all align — not just the base number.

Vibration, Heat, and What Breaks First

Radial needle roller bearings in gearboxes and material handling systems face continuous cyclic loading with limited misalignment tolerance. The 30mm width of this unit provides a broad needle contact zone, distributing radial forces across a larger shaft surface area compared to narrower alternatives. Temperature matters here because polyamide cages have an upper continuous operating limit around 120°C — beyond that, the material softens and loses its ability to maintain needle spacing under load.

Open-type construction means lubrication selection falls entirely on the installer. Grease works for lower-speed applications with infrequent maintenance access, while oil circulation handles higher-speed gearboxes where heat dissipation is critical. Either way, contamination ingress is the installer's responsibility since there are no integrated seals on this bearing. [NEED_CITE: lubrication selection impact on needle roller bearing service life]

What the TV and XL Suffixes Actually Control

The TV suffix specifies a molded polyamide cage — lighter than stamped steel, quieter at speed, and less prone to needle skidding during acceleration transients. Polyamide cages also dampen vibration transfer between needles, which extends shaft surface life in applications with intermittent shock loads. The trade-off is temperature sensitivity and incompatibility with certain aggressive synthetic lubricants.

Open construction without seals or shields allows maximum flexibility in lubrication but transfers sealing responsibility to the housing design. In dusty environments like agricultural machinery or mining conveyors, the housing must provide adequate labyrinth or lip seals to prevent abrasive particles from reaching the needle-to-shaft contact zone. The bearing's 0.011kg weight reflects the compact needle-and-cage-only design without inner or outer rings — a significant weight reduction compared to equivalent-capacity deep groove ball bearings in the same envelope.

When Selection Errors Become Downtime Events

Correct specification matching against verified documentation prevents the most expensive category of bearing failures — those that damage surrounding components before the bearing itself is inspected. A cage material mismatch on a needle roller bearing often goes undetected until needles escape the cage and score the shaft raceway, at which point simple bearing replacement is no longer sufficient.

Procurement engineers who source solely on base number without suffix verification accept hidden risk: premature cage failure, shaft surface damage, unplanned downtime, and warranty voidance from the equipment OEM. ISO 281 establishes the L10 life calculation framework, but that framework assumes correct specification — including cage material, clearance, and precision class. When any of those parameters diverge from the original design intent, calculated life becomes meaningless. [NEED_CITE: ISO 281 bearing life calculation assumptions and limitations]

What We Check Before It Ships

We source INA needle roller bearings through authorized distributor channels where batch traceability extends from our warehouse back to the original production lot. Every unit ships with supplier Certificate of Conformity documentation that includes batch and lot numbers, which you can verify against INA's official product authentication tools.

Our cross-reference database covers SKF, NSK, FAG, TIMKEN, NTN, and KOYO equivalents, but we match on more than base designation — cage material, clearance class, and precision must all align before we recommend substitution. When your application involves unusual temperature, speed, or contamination conditions, we provide application-based selection guidance rather than just quoting the requested part number.

Documentation & Authenticity

• Supplier Certificate of Conformity with batch and lot traceability linking to authorized INA distributor records
• Material certification confirming bearing steel composition per manufacturer specifications
• Third-party dimensional inspection report verifying Fw 35mm, D 45mm, and B 30mm tolerances before shipment
• Country-of-origin documentation prepared for import compliance in destination markets
• INA official app QR code verification pathway for authenticity confirmation at receiving inspection

Storage, Handling & Mounting

• Keep INA NK35/30-TV-XL units in original sealed packaging until installation — polyamide cages attract dust and moisture when exposed, which accelerates surface degradation before the bearing ever sees load
• Store at temperatures below 40°C away from direct UV exposure; polyamide cage material degrades under sustained heat and sunlight even without mechanical load
• Verify shaft hardness reaches HRC 58-62 and surface finish meets Ra 0.4 or better before mounting, since this design has no inner ring and the shaft serves as the raceway
• Apply clean handling gloves during installation to prevent skin oils from initiating corrosion on the needle contact surfaces
• Confirm housing sealing adequacy in dusty environments since the open-type design provides no integrated contamination barrier
• Select lubricant viscosity and additive package based on operating speed and temperature — polyamide cages are incompatible with certain EP additives and aggressive synthetic base oils

Request Technical Verification Before Ordering

Share your application parameters — radial load, operating speed, temperature range, and housing sealing arrangement — so we can verify this INA NK35/30-TV-XL needle roller bearing matches your design intent. Provide the OEM equipment number if you are replacing an existing installation, and we will cross-reference against our database to confirm cage material, clearance, and precision alignment.

Request the documentation package and origin confirmation before placing your order if import compliance requires advance review. Contact our technical team to verify batch availability and lead time for your required quantity.

Frequently Asked Questions

Q: How can I verify INA bearing authenticity using official tools? A: INA provides official app-based QR code verification that traces the bearing back through authorized distribution channels. We supply units with intact, scannable codes and supporting batch documentation that you can cross-check independently at receiving inspection.

Q: What does the "-XL" suffix indicate on INA needle roller bearings? A: The XL designation appears in certain INA product lines but its specific technical meaning for this needle roller bearing requires confirmation against the current manufacturer catalog. We recommend verifying this suffix meaning through INA documentation before locking it into your specification.

Q: What shaft requirements apply to needle roller bearings without inner rings? A: The shaft must be hardened to HRC 58-62 with a ground surface finish of Ra 0.4 or better, since it functions directly as the inner raceway. Insufficient hardness leads to rapid wear; inadequate surface finish accelerates needle skidding and cage stress.

Q: When should I choose polyamide over steel cage for needle roller bearings? A: Polyamide cages suit moderate-speed applications with vibration concerns where reduced weight and improved damping extend service life. Steel cages handle higher temperatures and aggressive lubricants but transmit more vibration to the shaft. Operating temperature and lubricant chemistry typically drive the selection.

Q: What parameters beyond base number must match in cross-reference substitutions? A: Cage material, clearance class, and precision grade must all align with the original specification — not just the base designation. Substituting standard clearance for C3, or polyamide cage for steel, changes thermal behavior and vibration characteristics in ways that can cause premature field failure.

Request Your Technical Review Share your operating parameters or OEM equipment number with our team for specification verification, cross-reference matching, and documentation review before your next procurement cycle.