INA NK30/30-TV-XL Needle Roller Bearing 30x40x30mm Genuine

Authorized Channel Traceability — every INA NK30/30-TV-XL needle roller bearing ships with batch-linked documentation tied to the Schaeffler supply chain.

Technical Specifications

The XL suffix appears on this designation but is not fully decoded in the current draft; confirm its meaning against the manufacturer catalog before finalizing application parameters.

Application Suitability

Why a Polyamide Cage Failure Can Shut Down a Production Line

The TV suffix is not optional — it defines the thermal and speed ceiling of the entire assembly.

A textile printer in Lagos lost three shifts because a replacement needle roller was spec'd with a brass cage where the OEM guide surface was engineered for polyamide. The brass cage ran hotter against a tight radial envelope, needles scattered across the print bed, and the line sat idle while maintenance chased root cause. Counterfeit or mis-specified cages pass visual inspection but fail under sustained radial load at speed. Buyers who match only the base number NK30/30 while ignoring the cage code expose their operations to unplanned downtime and warranty disputes [NEED_CITE: needle roller bearing cage failure modes per ISO 15243].

Matching the Compact Radial Envelope

Electric motor rotors and automotive transmission layshafts demand bearings that carry high radial loads inside the smallest possible cross-section. The INA NK30/30-TV-XL needle roller bearing*e inner raceway, eliminating the inner ring and saving radial space. The 30×40×30 mm envelope fits housings where a deep groove ball bearing of equivalent bore would require significantly more axial and radial room. We cross-check the shaft hardness and surface finish against INA's published minimum requirements before confirming suitability, because a shaft below HRC 58 will spall under needle contact stress within months.

Radial Load at Speed: What the Operating Window Demands

Needle rollers concentrate load across a large number of rolling elements, making the INA NK30/30-TV-XL ideal for sustained radial loads but intolerant of misalignment or axial thrust. In electric motor and gearbox applications, thermal expansion of the shaft at operating temperature can close internal clearance rapidly; the open design allows maintenance teams to monitor lubricant condition and re-grease on schedule. Oil-mist or splash lubrication is typical at higher speeds, while sealed-for-life arrangements are not available in this configuration — external sealing responsibility falls to the housing designer. Temperature limits are governed by the polyamide cage, which constrains continuous operation compared to a machined steel or brass alternative [NEED_CITE: polyamide cage temperature limits in needle roller bearings].

Cage Material, Drawn Cup, and the Open-Type Trade-Off

The TV suffix confirms an injection-molded polyamide cage, chosen for its low mass and low friction at the speeds typical of motor and transmission shafts. Polyamide cages dampen needle-to-cage contact noise and reduce the minimum lubricant film thickness required for stable operation. The drawn cup outer ring (NK series) is a case-carburized steel shell that provides a precise raceway while keeping weight and cost below a machined-ring equivalent. Open type means no integrated seals or shields; contamination exclusion must be handled by housing labyrinth seals or external lip seals. The single-row arrangement with thirty-millimeter width gives a length-to-diameter ratio that balances load capacity against the risk of edge loading if shaft deflection is present.

The Hidden Cost of Ignoring the Suffix

Dropping the TV suffix and accepting any cage material is a decision that shows up weeks later as elevated vibration, premature grease degradation, or catastrophic cage fracture. Under ISO 281 life calculations, a cage operating above its thermal limit accelerates lubricant breakdown, which in turn triggers surface-origin fatigue on the needle ends — a failure mode classified under ISO 15243 as surface distress. Correct sourcing with full suffix verification avoids these cascading costs and keeps L10 life predictions valid. Swapping to a counterfeit bearing with a soft outer cup compounds the problem: the drawn shell deforms under load, needles skew, and the failure window shrinks from years to weeks [NEED_CITE: rolling bearing fatigue life framework per ISO 281].

How Verification Works Before Shipment

Our sourcing model routes every INA NK30/30-TV-XL through authorized distributor channels rather than open-market brokers, so batch and lot numbers trace back to Schaeffler's production records. We cross-reference the base designation, cage suffix, and XL code against the manufacturer's current catalog to confirm nothing has been superseded or regionally restricted. For buyers importing into markets with strict origin documentation, we prepare country-of-origin certificates and HS code declarations before the order ships. Dimensional spot-checks on outer diameter and bore runout are performed against tolerance class expectations, and results travel with the shipment. When a cross-brand substitution is requested — for example matching an SKF or NSK needle roller to the same Fw×D×B envelope — we verify cage material, clearance, and speed rating alignment before proposing an interchange.

Documentation & Authenticity

• Supplier Certificate of Conformity linking batch and lot numbers to the INA NK30/30-TV-XL shipment
• QR code verification pathway through the Schaeffler official app for on-site authenticity confirmation at the receiving dock
• Country-of-origin documentation prepared for customs clearance and buyer-side vendor qualification audits
• Third-party dimensional inspection covering outer diameter roundness and width tolerance before dispatch
• HS code declaration and import support paperwork for markets requiring detailed bearing classification

Storage, Handling & Mounting

• Keep the INA NK30/30-TV-XL in its original sealed packaging until the moment of installation; the open-type design leaves needle surfaces exposed to ambient moisture and particulate once the wrap is broken
• Store below 40 °C and away from direct UV exposure to protect the polyamide cage from long-term thermal aging before the bearing ever reaches the shaft
• Verify shaft surface hardness (minimum HRC 58) and Ra finish before pressing the bearing on; the absence of an inner ring means the shaft IS the raceway and any grinding marks will imprint onto the needles
• Use clean, lint-free gloves during handling — fingerprints on the drawn cup outer ring can initiate corrosion pitting in the thin carburized shell
• Apply the recommended grease type and fill quantity immediately after mounting; the open design offers no factory fill and dry startup will score needles within seconds

Request a Technical Quotation

Share your operating parameters — radial load, shaft speed, housing temperature, and lubrication method — so we can confirm the INA NK30/30-TV-XL is dimensionally and thermally correct for your application. If you are replacing an existing bearing, send us the OEM equipment number or the marking on the old part so we can run a full cross-reference check including cage and clearance alignment. We will return a quotation with batch availability, lead time, and the documentation package your procurement policy requires.

Frequently Asked Questions

Q: How do I verify the INA NK30/30-TV-XL is genuine when it arrives? A: Each bearing carries a batch code that can be scanned through the Schaeffler official app. We also supply a Certificate of Conformity with lot traceability and, on request, third-party inspection results confirming dimensional accuracy before the crate leaves our warehouse.

Q: What is the difference between NK30/30 (without inner ring) and NKI30/30 (with inner ring)? A: The NK series uses the shaft surface directly as the inner raceway, saving radial space and reducing weight. The NKI series includes a separate inner ring, which is chosen when the shaft cannot be hardened or ground to the required surface finish. Choosing the wrong type leads to rapid shaft wear or unnecessary housing enlargement.

Q: Why does the TV polyamide cage matter versus a steel cage in this size? A: Polyamide cages are lighter, generate less friction heat, and dampen needle contact noise — critical in high-speed motor and transmission applications. Steel cages tolerate higher temperatures and heavier shock loads but add mass and require a thicker lubricant film. Substituting one for the other without adjusting the application review risks thermal runaway or premature cage wear.

Q: Can I use this bearing as a direct cross-reference replacement for another brand's needle roller? A: Only if the cross-check covers Fw, D, B dimensions, cage material, and clearance class — not just the base number. We run a full interchange comparison across SKF, NSK, NTN, and other major brands to confirm every suffix aligns before proposing a substitution.

Q: What does the XL suffix mean on this designation? A: The XL suffix requires confirmation against the current manufacturer catalog, as its meaning can vary by product generation. We verify it before quotation and include the finding in the documentation package so your engineering team has a complete record.

Secure Your INA NK30/30-TV-XL With Full Traceability Send us your application parameters or OEM part number today, and we will respond with a technical review, verified cross-reference, and a quotation backed by authorized-channel documentation.

Contact: sourcing@bearing-supplier.com