INA NKI45/35-TV Needle Roller Bearing 45x62x35mm Wholesale

Traceable Channel Sourcing — Every INA NKI45/35-TV needle roller bearing we dispatch carries a batch-linked certificate traceable back through Schaeffler authorized distributor records.

Technical Specifications

The TV suffix indicates an injection-molded polyamide cage per INA nomenclature; confirm specific cage variant against the current Schaeffler catalog before finalizing high-speed or high-temperature applications.

Application Suitability

What Happens When a Polyamide Cage Meets a Steel-Cage Speed Limit

Cage material dictates the thermal ceiling long before the bearing steel does.

I once traced a batch of returned spindle assemblies in Jeddah back to a single suffix omission — steel cages shipped where polyamide was specified. The vibration signature changed within weeks. When procurement teams match only the base number on a needle roller bearing and ignore the cage designation, the field consequence is rarely subtle. Counterfeit units with soft inner rings and cloned laser markings make the problem worse, because they pass a visual check but fail under radial load. A significant share of premature needle bearing seizures in gearboxes trace back to either a clearance mismatch or an unverified supply chain [NEED_CITE: rolling bearing failure mode classification per ISO 15243].

Matching the NKI45/35-TV to Compact Radial Envelopes

Needle roller bearings sit in the design envelope where radial load demand is high but cross-section height is constrained. The INA NKI45/35-TV needle roller bearing with inner ring delivers a 45 mm bore inside a 62 mm outer diameter, leaving a slim 8.5 mm radial wall for the roller complement. This ratio suits gearbox intermediate shafts and agricultural driveline supports where the housing bore is fixed but shaft hardness cannot be guaranteed. The integrated inner ring removes the need to case-harden and grind the shaft journal to serve as a raceway, cutting assembly preparation time. We regularly cross-check interchange requests from maintenance teams replacing OEM needle bearings and verify bore, OD, width, and cage material together — not just the base number.

Radial Loads, Speed Boundaries, and Temperature Drift

The load profile in most NKI applications is predominantly radial with minimal axial component, and the 35 mm width provides enough roller contact length to distribute stress across a wide footprint. Speed capability is governed by the polyamide cage: TV cages tolerate moderate rotational speeds comfortably but reach a thermal boundary well below brass or steel-caged equivalents. Temperature excursions above the cage's rated ceiling accelerate polyamide embrittlement, which shows up as cage fragmentation during teardown. Open-type construction means lubrication and contamination protection fall entirely on the housing seal design — a point worth confirming with the maintenance team before installation [NEED_CITE: needle roller bearing lubrication interval and contamination sensitivity].

Reading the Specs That Matter on This Bearing

The polyamide cage is the defining feature here. TV-caged needle rollers run quieter and lighter than steel-caged counterparts, reducing inertia during start-up and lowering friction at moderate speeds. However, the material imposes a firm temperature boundary and limits chemical exposure — synthetic gear oils with aggressive EP additive packages can degrade polyamide over time. The open construction means no integrated seal or shield: external housing seals must handle contamination exclusion, which is a deliberate trade-off favoring low friction over built-in protection. The 45 mm bore and 62 mm OD place this bearing in a compact section where shaft deflection is minimal and alignment is controlled by the housing. The single-row needle complement prioritizes radial rigidity in applications where axial loads are negligible or handled by a separate thrust element.

What an Unverified Source Really Costs

Correct specification paired with a traceable supply chain prevents the failure modes that shut down production lines. A needle roller bearing with a soft inner ring — a hallmark of counterfeits — develops raceway spalling within a fraction of the expected L10 life. Wrong cage material in a moderate-speed gearbox leads to cage pocket wear and eventual roller skew, generating vibration that propagates through the entire shaft assembly. ISO 281 life calculations assume genuine material properties and correct geometry; when either is compromised, the calculated service interval becomes meaningless [NEED_CITE: ISO 281 bearing life calculation assumptions and material quality factors]. The hidden cost is never the bearing itself — it is the unplanned downtime, the collateral damage to gears and seals, and the warranty disputes that follow.

How We Source and Verify Before Dispatch

We procure INA bearings through Schaeffler authorized distributor channels, which means every batch carries documentation that traces back to the manufacturer's production facilities. Cross-reference requests are matched on bore, OD, width, cage material, and clearance together — matching only the base designation is how field failures start. For buyers managing import documentation, we provide country-of-origin paperwork and HS code details aligned with the destination country's customs requirements. Dimensional inspection reports covering Fw, D, and B tolerances accompany pre-shipment documentation packages. When a maintenance engineer sends us an OEM equipment number instead of a bearing number, we work backward through the cross-reference database to confirm the exact suffix configuration the application requires.

Documentation & Authenticity

• Supplier Certificate of Conformity tied to the specific batch and lot number of your INA NKI45/35-TV shipment
• Third-party dimensional inspection covering bore (45 mm), OD (62 mm), and width (35 mm) tolerances per ISO 492
• Country-of-origin documentation prepared for customs clearance in Middle East, African, and Latin American import jurisdictions
• Schaeffler official QR code verification pathway for confirming marking authenticity on each bearing
• Material certificate available on request to confirm bearing steel grade for the inner ring and outer ring

Storage, Handling & Mounting

• Retain original INA sealed packaging until installation — the open-type construction of this NKI45/35-TV means exposed raceways will attract moisture and particulate if unwrapped early
• Store below 30 °C and away from direct UV exposure to protect the polyamide cage from premature aging before the bearing even reaches the shaft
• Use clean lint-free gloves when handling the 45 mm bore and roller complement; fingerprint residue on needle rollers initiates corrosion under boundary lubrication conditions
• Press-fit the inner ring onto the shaft journal using a sleeve that contacts only the inner ring face — driving force transmitted through the polyamide cage will crack the cage pockets
• Confirm housing seal design before installation; the open bearing relies entirely on external seals for contamination exclusion in agricultural and material handling environments

Request a Technical Match

Share your operating parameters — radial load, speed, ambient temperature, and housing seal type — so we can confirm whether the TV polyamide cage fits your duty cycle or whether an alternative INA needle roller configuration is more appropriate. If you are replacing an OEM-specified bearing, send us the equipment nameplate number and we will verify the exact cross-reference including cage and clearance suffixes.

Frequently Asked Questions

Q: How do I confirm the INA NKI45/35-TV is genuine before installation? A: Every unit we supply carries batch and lot traceability linked to a Schaeffler authorized distributor channel. You can verify markings using the official Schaeffler QR code verification tool. We also provide a Certificate of Conformity and, on request, a third-party dimensional inspection report for the 45×62×35 mm envelope.

Q: What changes if I cross-reference this bearing to another brand? A: A valid cross-reference must match bore, OD, width, cage material, and clearance — not just the base designation. Switching to a steel-caged equivalent in an application designed for the polyamide TV cage will alter friction behavior, speed capability, and noise signature. We confirm all parameters before proposing an interchange.

Q: Polyamide cage versus steel cage — which fits my application? A: Polyamide cages run lighter and quieter, suited to moderate-speed industrial and automotive applications. Steel cages tolerate higher temperatures and are more resistant to aggressive lubricant additives. The choice depends on your operating temperature, speed, and oil chemistry. Share those parameters and we will advise accordingly.

Q: Should I choose NKI (with inner ring) or NK (without inner ring)? A: NKI bearings like the NKI45/35-TV include an integrated inner ring, which is necessary when the shaft journal cannot be hardened and ground to serve as a raceway. NK-type bearings run directly on a prepared shaft surface and require the shaft to meet specific hardness and surface finish standards. The decision rests on your shaft preparation capability.

Q: What documentation comes with a bulk order? A: Bulk shipments include a Certificate of Conformity with batch traceability, country-of-origin documentation, HS code details for import clearance, and a dimensional inspection report. Pre-shipment inspection is standard before dispatch.

Confirm Your INA NKI45/35-TV Requirement Send us your application parameters or OEM equipment number, and we will return a verified cross-reference with full documentation and lead-time confirmation.