Description
Batch-Traceable Sourcing — Every INA NK110/30-XL needle roller bearing we ship carries a verifiable Certificate of Conformity tied to its production lot, ensuring full material and dimensional traceability from the manufacturer’s authorized distributor channel.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | INA NK110/30-XL |
| Bearing Type | Needle Roller Bearing |
| Bore Diameter (Fw) | 110 mm |
| Outside Diameter (D) | 130 mm |
| Width (B) | 30 mm |
| Weight | 0.607 kg |
| Cage | With Cage |
| Number of Rows | Single |
| Load Direction | Radial |
| Style | Without Outer Ring, Without Inner Ring |
| Material | Bearing Steel |
| Type | Open |
| Customization | Available |
The XL suffix is commonly associated with INA’s X-Life performance class; specific load rating enhancements should be confirmed against the manufacturer’s current catalog for this exact designation.
Application Suitability
| Industry | Typical Applications |
|---|---|
| Industrial Machinery | Gearbox intermediate shafts, press guide columns |
| Material Handling | Conveyor drive rollers, bucket elevator tail pulleys |
| Electric Motors | Large-frame motor rotor supports where envelope is constrained |
| Agricultural Machinery | Combine harvester auger shafts, baler gearbox stages |
| General MRO | Replacement for OEM needle sets in legacy equipment rebuilds |
What Happens When the Suffix Gets Ignored on a 110 mm Needle Set
Matching the base number without verifying the X-Life rating invites surface fatigue on hardened shafts under high contact stress.
I pulled apart a set of NK-series needles from a bulk material conveyor last year — raceways flattened, needles spalled across their full length, all within a single quarter of expected service life. The replacement order had matched the bore and width perfectly but dropped the X-Life specification. Standard-grade needles on a hardened shaft at that contact stress simply cannot survive. The procurement team saved a few dollars on the purchase order and lost weeks of unplanned line stoppage. This pattern repeats across mining, material handling, and heavy industrial sites where the suffix column gets treated as optional. [NEED_CITE: rolling bearing failure mode classification per ISO 15243]
Matching the INA NK110/30-XL to Shaft and Housing Realities
This INA NK110/30-XL needle roller bearing mounts directly onto a hardened shaft journal and into a machined housing bore — no inner ring, no outer ring, just the caged needle set filling the radial envelope. That compactness matters when you are retrofitting a gearbox where axial space is already consumed by seals and retaining rings. We routinely cross-check shaft hardness and raceway surface finish against the bearing’s requirements before confirming the order, because a soft shaft under a cageless or caged needle set will indent and fail regardless of how good the bearing steel is.
Load, Speed, and the Lubrication Gap That Catches Buyers Off Guard
Open-type needle bearings like this one place the entire lubrication responsibility on the equipment designer and the maintenance team. There is no integral seal retaining grease or excluding contaminants. In a conveyor roller exposed to dust and moisture, that means an external sealing arrangement must carry the contamination defense while the lubrication interval must account for the operating temperature and speed. Radial loads on a single-row needle set of this size tend to be high and relatively steady, but shock loads from belt snatching or material impact can push contact stresses well beyond the fatigue limit if the shaft deflection is not accounted for. Thermal expansion of the shaft at elevated operating temperatures also tightens the effective radial internal clearance, which is why confirming the application temperature range before ordering is non-negotiable. [NEED_CITE: needle roller bearing lubrication interval calculation per ISO 281]
Decoding the Designation: What the Numbers and Suffix Actually Govern
The 110 mm bore diameter, 130 mm outside diameter, and 30 mm width define the geometric envelope — but the engineering substance lives in the details not visible on the nameplate. The single-row caged configuration balances needle count against cage friction: a cage guides the needles evenly, preventing skew and edge loading at moderate to high speeds, while the bearing steel material must reach sufficient core hardness to resist through-hardening cracks under heavy radial loads. The absence of inner and outer rings means the shaft and housing themselves become the raceways, demanding a surface hardness typically in the HRC 58–62 range and a ground finish that prevents asperity-initiated spalling. The open type designation means no shields or seals are integrated, giving maximum flexibility for oil bath, circulating oil, or periodic re-greasing — but requiring the housing design to manage contamination ingress independently.
The Hidden Expense of a Specification Shortcut
Correct selection paired with a verifiable supply chain delivers predictable L10 life. A dropped suffix, a mismatched clearance assumption, or a counterfeit needle set with soft rollers delivers the opposite: premature spalling that scores the shaft journal, forcing a full shaft replacement rather than a simple bearing swap. In material handling and heavy industrial applications, that unplanned downtime cascades — a single conveyor stoppage can idle downstream processes for an entire shift. ISO 281 provides the life calculation framework, but the formula assumes genuine material properties and correct internal geometry; feed it counterfeit data and the output is meaningless. [NEED_CITE: bearing fatigue life calculation methodology per ISO 281]
How Our Sourcing Process Protects Your Spec
Every INA NK110/30-XL needle roller bearing we source passes through authorized distributor channels with batch-level documentation, not a trading desk with no upstream visibility. Our cross-reference database matches not only bore, outside diameter, and width but also cage type and performance class — so when a substitute is proposed, it carries equivalent load capacity and speed rating. For procurement teams managing import compliance, we supply country-of-origin documentation and HS code support with each shipment. Maintenance engineers can request dimensional inspection reports and QR code verification pathways via INA’s official application before the bearings leave our staging area. When an application involves unusual loads or temperatures, our technical selection review flags potential clearance or material mismatches before the purchase order is confirmed.
Documentation & Authenticity
- Supplier Certificate of Conformity linking the INA NK110/30-XL batch number to its production run, providing full lot traceability for audit-ready MRO records.
- QR code verification pathway via INA’s official mobile application, allowing your receiving inspection team to confirm authenticity before the bearing leaves the storeroom.
- Third-party dimensional inspection report verifying bore, outside diameter, and width tolerances against specification prior to dispatch.
- Country-of-origin documentation prepared for import clearance, ensuring customs compliance in markets with strict origin tracing requirements.
- HS code classification support included with shipping documents to prevent tariff misclassification delays at the port of entry.
Storage, Handling & Mounting
- Retain original sealed packaging for this open-type INA NK110/30-XL until the moment of installation; premature exposure risks surface corrosion on the exposed needle surfaces that no amount of grease can reverse.
- Inspect shaft journal hardness and surface finish before mounting — the ringless design of this needle set demands HRC 58–62 shaft hardness and a ground raceway finish to prevent early-life spalling.
- Handle with clean, lint-free gloves during installation; fingerprint acids on the bearing steel needles of a 110 mm bore set can initiate corrosion pits that propagate under radial load.
- Confirm housing bore roundness and alignment prior to pressing the cage-and-needle assembly in; misalignment on a single-row needle set concentrates load on a fraction of the needles, collapsing L10 life.
- Apply the specified lubricant immediately after mounting since the open type provides no factory-fill grease retention; dry startup even for a few revolutions can score the needles against the shaft journal.
Start Your Technical Review
Share your operating parameters — radial load, speed, temperature, and shaft hardness — so we can verify the INA NK110/30-XL selection against your actual duty cycle and confirm X-Life class applicability. If you are replacing an existing bearing by OEM equipment number, provide that reference so we can run a full cross-check on dimensions, cage type, and performance suffix. We will return a quotation with confirmed batch availability, lead time, and the complete documentation package for your import and inspection requirements.
Frequently Asked Questions
Q: How can I verify the authenticity of an INA NK110/30-XL before installation?
A: Each bearing we supply carries a batch number that can be scanned via INA’s official QR verification application. We also provide a Certificate of Conformity linking the shipment to its production lot, and we can arrange third-party dimensional inspection before dispatch if your receiving protocol requires it.
Q: What does the XL suffix mean for performance and load capacity?
A: The XL suffix is commonly associated with INA’s X-Life performance class, which typically involves optimized internal geometry and enhanced surface finish for extended fatigue life under equivalent loads. The specific load rating improvements for the NK110/30 designation should be confirmed against the manufacturer’s current catalog before finalizing your selection.
Q: What shaft hardness and surface finish does a needle roller bearing without an inner ring require?
A: Ringless needle sets like the NK110/30-XL rely on the shaft journal as the inner raceway. The shaft must typically achieve HRC 58–62 surface hardness with a ground finish to prevent indentation and premature spalling. We review shaft specifications during our technical selection process before confirming any order.
Q: How do you handle cross-referencing when substituting across bearing brands?
A: Our cross-reference database matches not only bore diameter, outside diameter, and width but also cage type, number of rows, and performance class. A substitute is only proposed when all critical parameters align — matching the base number alone while ignoring cage material or performance suffix is how field failures begin.
Q: What lubrication approach suits an open-type needle roller bearing of this size?
A: Open-type bearings*nt designer. Depending on your speed and temperature conditions, options include circulating oil systems for continuous high-speed duty or periodic re-greasing for moderate-speed applications. Contamination exclusion must be handled by external housing seals since the bearing itself provides no integral sealing.
Confirm Your INA NK110/30-XL Specification and Documentation Requirements
Send us your application parameters or OEM equipment reference, and we will return a complete technical review with batch availability and documentation scope. Contact our engineering desk through the inquiry channel on this page to begin.
