INA NK45/30-TV-XL Needle Roller Bearing 45x55x30mm

Authorized Channel Sourcing — Every INA NK45/30-TV-XL leaves the factory with batch-level traceability documentation intact.

Technical Specifications

The "XL" suffix in this designation remains unverified against the current manufacturer catalog; confirm its specific meaning with the supplier before finalizing an order.

Application Suitability

When a Polyamide Cage Meets a Vibrating Screen

A cage material mismatch is the silent killer of needle roller bearings in oscillating applications.

Polyamide cages reduce mass and dampen noise at moderate speeds, but they soften under sustained heat or chemical exposure. I once watched a batch of needle rollers fail inside vibrating screens within weeks because the polyamide cages degraded under constant high-frequency shock and friction heat — a steel-cage variant would have lasted years [NEED_CITE: polyamide cage temperature limits in oscillating bearing applications]. The INA NK45/30-TV-XL needle roller bearing is built for environments where its polyamide cage stays within its thermal envelope. Push it into the wrong duty cycle and the cage pockets deform, needles skew, and the raceway scores before the next scheduled maintenance window.

Matching the Bearing to the Shaft and the Load

The INA NK45/30-TV-XL needle roller bearing drops directly onto a hardened, ground shaft journal — no inner ring required. That design choice saves radial space in tight gearbox housings and motor end-bells where every millimeter of envelope matters. For the maintenance engineer replacing a worn unit on a conveyor drive or a compact motor, this means verifying that the shaft surface hardness and roughness meet the manufacturer's raceway requirements before pressing the new bearing on. Cross-referencing against alternative brands requires matching not just the 45×55×30 mm dimensions but also the cage material and clearance class, which is where our interchange database prevents field surprises.

Heat, Contamination, and the Open-Type Trade-Off

Open-type needle rollers rely on the housing's own sealing system to keep contaminants out and lubricant in. In dusty environments like aggregate handling or grain processing, that puts the burden on the equipment designer to specify adequate labyrinth or lip seals upstream. Radial loads on the INA NK45/30-TV-XL needle roller bearing are well distributed across the full needle complement, but axial location must come from adjacent components — the bearing itself does not constrain axial displacement. Lubrication intervals shorten when ambient dust or moisture penetrates the housing, so greasing schedules should reflect the actual site conditions rather than the catalog ideal [NEED_CITE: needle roller bearing lubrication interval adjustment for contaminated environments].

Reading the Suffix: TV and What It Demands

The TV suffix confirms a polyamide cage — lighter than brass or steel, which means lower inertia and quieter running at the speeds typical of electric motors and automotive ancillaries. Polyamide also resists edge-loading stress better than stamped steel in marginal alignment situations. The trade-off is a ceiling on continuous operating temperature and incompatibility with certain synthetic lubricants that attack the polymer matrix. Always cross-check the grease base oil against polyamide compatibility before relubrication.

The Price Tag Hidden Behind a Wrong Cage Choice

Selecting the correct INA NK45/30-TV-XL needle roller bearing from a verified source avoids the downstream costs that dwarf the unit price. A polyamide cage operating beyond its thermal limit loses dimensional stability, leading to needle skew and raceway spalling that ISO 15243 classifies under cage failure and surface fatigue [NEED_CITE: rolling bearing failure mode classification per ISO 15243]. Counterfeit bearings with cloned markings and substandard cage material accelerate that timeline. Unplanned downtime on a production line or a stranded vehicle in the field costs orders of magnitude more than the bearing itself.

How We Keep the Supply Chain Honest

Our sourcing model routes through authorized distributor channels rather than grey-market traders, so every INA NK45/30-TV-XL needle roller bearing arrives with documentation that traces back to the production batch. We verify suffix accuracy — cage material, clearance, precision — against the application parameters you share, not just the base designation. Our cross-reference database covers SKF, NSK, FAG, TIMKEN, NTN, and KOYO equivalents with full suffix alignment, preventing the clearance-and-cage mismatches that cause thermal binding or premature cage failure in the field.

Documentation & Authenticity

• Supplier Certificate of Conformity tied to the specific production batch of the INA NK45/30-TV-XL needle roller bearing shipped
• Third-party dimensional inspection report confirming Fw 45 mm, D 55 mm, and B 30 mm tolerances before dispatch
• QR code verification pathway through the INA official app for on-site authenticity checks upon receipt
• Country-of-origin documentation and HS code details prepared for customs clearance at destination
• Material certificate confirming cage polymer grade and needle steel specification

Storage, Handling & Mounting

• Keep the INA NK45/30-TV-XL in its original sealed packaging until the moment of installation; polyamide cages absorb moisture over time, which can alter dimensional stability if the wrapping is opened prematurely
• Store below 40 °C and away from direct UV exposure to prevent long-term degradation of the polyamide cage material
• Handle with clean, lint-free gloves — the open-type design means any contamination introduced during handling goes straight to the needle-to-raceway contact zone
• Before mounting, confirm the shaft journal hardness and surface finish meet needle-roller raceway standards; this bearing has no inner ring, so the shaft itself is the raceway
• Apply the specified lubricant to the shaft and housing bore before pressing the bearing into position; the open design requires external lubrication at assembly

Start the Selection Conversation

Share your application parameters — load profile, operating speed, ambient temperature, and housing sealing arrangement — so we can confirm the INA NK45/30-TV-XL needle roller bearing is the right match or recommend a steel-cage alternative if the duty cycle demands it. Provide the OEM equipment number for a full cross-reference check including clearance and cage verification. Request the documentation package and batch availability to align with your procurement timeline.

Frequently Asked Questions

Q: How do I confirm that the INA NK45/30-TV-XL needle roller bearing I received is genuine? A: Scan the QR code on the packaging using the INA official app. Cross-check the batch number on the Certificate of Conformity against the shipping documents. If anything looks inconsistent — print quality, marking depth, or cage color — contact us before installation.

Q: Can I substitute a steel-cage needle roller bearing in place of the TV polyamide version? A: Dimensionally, a steel-cage equivalent may fit the same 45×55×30 mm envelope, but the weight, noise signature, and speed limits will differ. Share your operating conditions so we can identify a cross-reference that matches on clearance and load capacity as well as cage suitability.

Q: What shaft preparation is needed since this bearing has no inner ring? A: The shaft journal must be hardened to the manufacturer's specified range and ground to the required surface finish. Soft or rough shafts act as a poor raceway and cause premature needle wear.

Q: How does the open-type design affect my maintenance schedule? A: Open bearings depend entirely on the housing seal and external lubrication system. In contaminated environments, shorten relubrication intervals and verify that the grease is compatible with the polyamide cage material [NEED_CITE: grease compatibility with polyamide bearing cages].

Q: What does the XL suffix indicate on this INA bearing? A: The XL suffix has been seen on various INA product lines to denote extended-life or optimized internal geometry variants. We recommend confirming its specific meaning for this needle roller series against the manufacturer's current documentation before placing a bulk order.

Confirm Your INA NK45/30-TV-XL Requirements Send us your application data or OEM part number — we will return a cross-reference match, documentation preview, and lead-time estimate. Contact our technical sales team via the inquiry form on our website or email your specifications directly.