Description
Authorized Traceability — Genuine INA NK19/16-XL needle roller bearings sourced with batch-level documentation and QR verification pathways.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | INA NK19/16-XL |
| Bearing Type | Needle Roller Bearing |
| Bore Diameter (Fw) | 19mm |
| Outside Diameter (D) | 27mm |
| Width (B/C) | 16mm |
| Weight | 0.027kg |
| Cage Material | unverified |
| Seal or Shield Type | Open |
| Number of Rows | Single Row |
| Style | Without Outer Ring, Without Inner Ring |
| Load Direction | Radial Bearing |
| Material | Bearing Steel |
The XL suffix on this INA NK19/16-XL denotes the X-Life series per INA catalog nomenclature; specific performance claims should be confirmed against the manufacturer’s current technical documentation.
Application Suitability
| Industry | Typical Applications |
|---|---|
| Power Tool Manufacturing | Gearhead planetary stages in cordless drills and impact wrenches |
| Industrial Gearboxes | Compact reduction stages in servo-driven automation drives |
| Material Handling | Guide roller pivots on conveyor transfer arms |
| Automotive Repair | Steering column intermediate shaft supports |
What Happens When a 19mm Needle Roller Fails Inside a Gearhead
Cage fatigue and needle skewing account for a significant share of field returns on compact power tool transmissions.
When procurement teams source bearings by outer dimension alone, critical mismatches in cage material and speed rating slip through. A stamped steel cage rated for moderate RPM will crack within months when installed in a high-speed gearhead, causing needles to skew, scoring the shaft raceway, and seizing the transmission on job sites [NEED_CITE: rolling bearing failure mode classification per ISO 15243]. Counterfeit INA needle roller bearings with cloned markings and soft needles compound the problem — they pass visual inspection but collapse under sustained radial load.
Matching the INA NK19/16-XL to High-Speed Gearhead Loads
The INA NK19/16-XL needle roller bearing fits power tool gearhead designs where radial load capacity must be maximized within a minimal cross-section envelope. Without inner or outer rings, the needles ride directly on a hardened shaft and housing bore, demanding raceway surfaces ground to tight tolerances. In our experience supplying transmission components across the Middle East, buyers who verify shaft hardness and surface finish before installation see noticeably longer L10 life compared to those who treat the housing bore as a press-fit afterthought.
Operating Environment and Performance Demands
Power tool gearheads generate combined radial and moment loads during aggressive cutting or fastening, with frequent direction reversals that stress needle-to-cage contacts. The open design of this bearing means lubrication selection falls entirely to the equipment builder — grease choice must balance high-speed shear stability against contamination resistance in dusty job-site conditions [NEED_CITE: needle roller bearing lubrication selection for high-speed enclosed gearboxes]. Operating temperatures inside compact gearheads can rise substantially under sustained duty cycles, making thermal expansion of the aluminum housing a factor in residual radial clearance. Shaft and housing raceways must be hardened to at least HRC58-62 with a surface finish suitable for direct needle contact.
Core Specifications Decoded
The 19mm bore, 27mm OD, and 16mm width define a compact radial section that delivers high load density for the volume occupied. Needle rollers distribute radial forces across a broader contact line than ball bearings of similar cross-section, reducing Hertzian contact stress on the shaft raceway. The open type designation means no integrated seals or shields are present — this allows application-specific lubricant selection but places contamination exclusion responsibility on the housing design. The single-row arrangement keeps axial width minimal, which matters in stacked planetary stages where every millimeter of envelope is contested. The bearing steel material provides the core fatigue strength required for repeated load cycling in industrial duty applications.
The Hidden Cost of a Misidentified Needle Bearing
Installing a counterfeit or mis-specified needle roller in a production gearhead leads to unplanned downtime that ripples through assembly schedules and warranty obligations. Premature cage failure can scatter needles inside the gearbox, causing catastrophic damage to adjacent gears and shafts [NEED_CITE: ISO 281 bearing life calculation framework for radial needle roller bearings]. Warranty claims from end users who experience tool seizure on site erode brand trust far beyond the replacement cost of a single bearing. Sourcing from traceable authorized channels eliminates the variable of material authenticity from the failure equation.
Why Gearhead Engineers Source Through Our Channel
We procure INA needle roller bearings through authorized distributor networks with full batch traceability, so the Certificate of Conformity traces back to the production lot. Our cross-reference database matches not only the base designation but also cage material, clearance, and precision suffix — preventing the dimensional-only substitution errors that cause field failures. When buyers need origin documentation for customs clearance, we supply country-of-origin certificates alongside the commercial invoice. Every shipment includes dimensional inspection data and QR verification pathways through INA’s official app. We also guide buyers through shaft and housing raceway preparation requirements so the bearing performs as designed once mounted.
Documentation & Authenticity
- Supplier Certificate of Conformity with batch and lot traceability linked to INA production records
- QR code verification pathway enabling authenticity checks through the official INA app before installation
- Third-party dimensional inspection confirming bore, OD, and width tolerances prior to shipment
- Material certificate documenting bearing steel composition and heat treatment compliance
- Country-of-origin documentation supporting customs clearance for Middle East, African, and Latin American imports
- HS code classification assistance for accurate import duty assessment
Storage, Handling & Mounting
- Keep the INA NK19/16-XL in original sealed packaging until mounting to preserve factory-applied rust preventive on the open needle surfaces
- Verify shaft raceway hardness reaches HRC58-62 and surface roughness meets INA specifications before pressing the bearing into position — the lack of an inner ring means the shaft itself is the raceway
- Use clean lint-free gloves when handling the exposed needle rollers to prevent skin moisture from initiating corrosion on the bearing steel surfaces
- Select lubricant viscosity and fill volume based on the gearhead’s operating speed and thermal profile, since the open design provides no factory grease fill
- Store flat in a temperature-stable environment below 60% relative humidity to prevent condensation inside the unsealed needle complement
Request a Quotation with Full Technical Validation
Get Your INA NK19/16-XL Bearing Verified and Quoted
Share your gearhead operating parameters — speed, load profile, housing material, and lubrication plan — so we can confirm this 19x27x16mm needle roller matches your application requirements. Provide the OEM equipment number if you are replacing an existing bearing, and we will run a cross-reference check including cage and clearance alignment.
Contact us with your technical drawings or equipment documentation to begin the sourcing process.
Frequently Asked Questions
Q: How can I verify that my INA NK19/16-XL bearing is genuine?
A: Genuine INA bearings carry batch-specific QR codes that link to the manufacturer’s verification system. We supply the Certificate of Conformity with lot traceability so you can cross-check authenticity through INA’s official app before the bearing enters your production line.
Q: What does the X-Life designation mean for needle roller bearing performance?
A: The XL suffix on the INA NK19/16-XL indicates membership in INA’s X-Life series, which denotes enhanced performance characteristics as defined in the manufacturer’s catalog. Specific load rating and life improvements should be verified against current INA technical documentation for your application conditions.
Q: What shaft and housing requirements apply to this bearing without inner or outer rings?
A: Because the NK19/16-XL operates without dedicated rings, the shaft and housing bore serve as raceway surfaces. Both must be hardened to appropriate levels and ground to the tolerances specified by INA to ensure proper load distribution across the needle rollers and prevent premature surface fatigue.
Q: How should I select lubrication for this open-type needle roller bearing?
A: Lubricant selection depends on your gearhead’s operating speed, temperature range, and contamination exposure. The open design means no factory grease fill is present, so the equipment builder must specify and apply the correct grease or oil based on the application’s thermal and mechanical profile.
Q: Can I substitute another brand’s needle roller bearing for the INA NK19/16-XL?
A: Cross-brand substitution requires matching not only the 19x27x16mm dimensions but also the cage material, radial clearance, and needle profile. We run a full cross-reference comparison against other major brands to ensure all critical parameters align before recommending an interchange.
Secure Your INA NK19/16-XL Supply with Verified Authenticity
Send us your application parameters or OEM part number today, and our technical team will return a validated quotation with full traceability documentation and lead time confirmation.
