Description
Authorized Channel Procurement — Traceable batch documentation and origin files shipped with every FAG NN3026TN9/SPC1LW33 double row cylindrical roller bearing to support customs clearance and counterfeit exclusion.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | FAG NN3026TN9/SPC1LW33 |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Bore Diameter (d) | 130 mm |
| Number of Rows | Double Row |
| Structure | Cylindrical |
| Seal or Shield Type | Open |
| Origin | China |
Note: Suffixes TN9, /SP, C1L, and W33 appear in the supplied designation but are not verified against the current FAG super-precision cylindrical roller bearing catalog; confirm exact cage material, precision class, clearance, and lubrication groove definitions with the manufacturer before final specification.
Application Suitability
| Industry | Typical Applications |
|---|---|
| Industrial Machinery | Precision machine tool spindle rear support |
| Steel and Metallurgy | Rolling mill work roll and backup roll neck |
| General MRO | Heavy-duty industrial gearbox intermediate shaft |
What a Wrong Suffix Costs on a Precision Spindle
Matching the base bore number without verifying the clearance, cage, and precision suffixes is the most common cause of thermal seizure in high-rigidity spindle installations.
I have walked into workshops where a double row cylindrical roller bearing was installed on a spindle designed for SP precision, only to find the replacement was standard P6. The runout was acceptable on the bench, but once the spindle reached operating speed, vibration climbed past tolerance and the operator had to scrap a batch of machined parts. In another case, a standard CN clearance unit was pressed into a gearbox that ran above typical industrial ambient temperatures; the inner ring expanded, internal clearance collapsed, and the cage showed stress fractures before the next scheduled maintenance window [NEED_CITE: rolling bearing failure mode classification per ISO 15243]. The FAG NN3026TN9/SPC1LW33 double row cylindrical roller bearing must be cross-checked on every suffix — not just the bore code — to prevent these field failures.
How This Bearing Meets Spindle and Gearbox Requirements
A 130 mm bore double row cylindrical roller bearing sits at the intersection of high radial rigidity and moderate speed capability, which is exactly what precision spindle rear supports and heavy-duty gearbox intermediate shafts demand. The open design allows direct oil-air or oil-jet lubrication, letting maintenance crews match the lubricant to the actual operating temperature rather than relying on a factory grease fill. When we supply the FAG NN3026TN9/SPC1LW33 double row cylindrical roller bearing, we pair it with a cross-reference sheet that confirms clearance class, cage material, and precision grade match the OEM equipment drawing — not just the base number.
Load Spectrum, Thermal Growth, and Lubrication Reality
Double row cylindrical roller bearings handle pure radial loads; any axial component must be absorbed by a separate thrust bearing elsewhere in the shaft arrangement. On rolling mill roll necks, shock loads from bar end passage create momentary radial spikes that demand full-complement or high-capacity cage designs. Temperature is the silent variable: a spindle that idles at one temperature and cuts at another will cycle through thermal expansion, making clearance class selection critical to avoid preload loss or thermal binding. Oil lubrication with filtration is generally preferred over grease in these open bearings because contamination from metal fines or coolant mist degrades lubricant film strength, accelerating surface-origin spalling per ISO 15243 categories [NEED_CITE: effect of lubricant contamination on bearing fatigue life per ISO 281].
Reading the Suffix Stack
The NN prefix confirms the double row cylindrical configuration, and 3026 places the bearing in size series 30 with a 130 mm bore. The open type means no integral seals or shields — the housing must provide contamination exclusion. For the remaining suffixes, TN9 is widely recognized in SKF nomenclature as a glass-fiber reinforced polyamide cage, but FAG typically uses different cage designations for super-precision cylindrical rollers; /SP indicates a precision class between P5 and P4 in SKF’s system, though FAG’s equivalent must be confirmed; C1L suggests a reduced clearance class with a specific range, and W33 normally denotes an annular lubrication groove with three holes in the outer ring in SKF convention, where FAG’s equivalent is often E1. Each of these suffixes must be verified against the manufacturer’s current catalog to ensure the unit on the shelf matches the drawing requirement.
The Hidden Cost of a Cheap Substitute
Installing a counterfeit or mis-specified double row cylindrical roller bearing does not show up as an immediate failure. The damage accumulates: micro-pitting on the raceway from insufficient film thickness, cage wear from vibration at the wrong clearance, and eventual spalling that releases debris into the oil system. By the time the vibration sensor triggers an alarm, secondary damage to gears, seals, and adjacent bearings has already occurred. ISO 281 life calculations assume correct internal clearance and lubrication — when either is wrong, the calculated L10 life is no longer valid, and unplanned downtime replaces scheduled maintenance [NEED_CITE: bearing fatigue life calculation assumptions per ISO 281].
How We Reduce Procurement Risk for This Bearing
We source the FAG NN3026TN9/SPC1LW33 double row cylindrical roller bearing through authorized distributor channels, which means every unit carries batch-level traceability back to the production lot. Our cross-reference database aligns clearance, cage material, and precision suffixes across SKF, NSK, FAG, TIMKEN, NTN, and KOYO so that substitutions are made on full technical equivalence — not just base designation. Before shipment, we confirm country-of-origin documentation and HS codes so your import paperwork clears without delay. For buyers concerned about counterfeit exposure, we provide the QR code verification pathway through the brand’s official application, and we can arrange third-party dimensional inspection on request.
Documentation & Authenticity
- Supplier Certificate of Conformity referencing the exact batch and lot number of the FAG NN3026TN9/SPC1LW33 double row cylindrical roller bearing
- Material certificate confirming bearing steel grade and heat treatment compliance
- Dimensional inspection report covering bore tolerance, outer diameter, and width against the specified precision class
- Country-of-origin documentation and HS code for customs clearance
- Batch and lot traceability records linking the shipped unit to the manufacturer’s production lot
- QR code verification instructions via the brand’s official mobile application
Storage, Handling & Mounting
- Keep the 130 mm bore bearing in its original sealed packaging until the mounting shift begins; early exposure to humid shop air risks corrosion on the precision-ground raceways
- Store flat and supported across the full width to prevent cage distortion in this double row configuration
- Clean the shaft seat and housing bore with lint-free cloth before mounting; any debris trapped under the inner ring will show up as runout at operating speed
- Use induction heating for the inner ring fit on this cylindrical bore design, monitoring temperature to avoid exceeding the tempering limit of the bearing steel
- Apply the specified oil or grease immediately after mounting since this open type bearing ships without preservative lubricant fill
- Record the mounting date, measured shaft and housing dimensions, and initial vibration baseline for future maintenance comparison
Start Your Technical Review
Share your application parameters — load, speed, operating temperature, and mounting envelope — or provide the OEM equipment number so we can verify the FAG NN3026TN9/SPC1LW33 double row cylindrical roller bearing suffix stack against the original specification. We will return a cross-reference confirmation, availability status, and a documentation package outline before you commit to an order.
Frequently Asked Questions
Q: How do I verify the authenticity of a FAG cylindrical roller bearing received from a third-party supplier?
A: Use the brand’s official mobile application to scan the QR code on the packaging; the app confirms the production lot and authorized distribution path. Cross-check the batch number on the bearing label against the Certificate of Conformity supplied with the shipment.
Q: Why must clearance, cage material, and precision suffixes all match — not just the base designation?
A: A base number match alone can hide critical differences. A standard CN clearance bearing installed where C3 was required will lose internal clearance as the inner ring expands thermally, leading to cage overload and premature failure. Similarly, a polyamide cage rated for one speed range may fail in an application demanding a machined brass cage.
Q: What is the difference between SKF and FAG suffix conventions for this bearing type?
A: SKF uses W33 to denote an annular lubrication groove with three holes, while FAG typically designates the same feature as E1. Cage and precision suffixes also differ between catalogs. The suffixes TN9, /SP, C1L, and W33 in this designation must each be verified against the current FAG catalog to confirm exact meaning before procurement.
Q: How do I select between oil and grease lubrication for this open type bearing?
A: Oil lubrication — typically oil-air or oil-jet — is preferred for high-speed spindle applications because it provides continuous cooling and contaminant flushing. Grease is suitable for moderate-speed gearbox applications where relubrication intervals can be maintained and contamination is controlled by housing seals.
Q: What documentation package accompanies a bulk order?
A: Each shipment includes a Certificate of Conformity, material certificate, dimensional inspection report, batch traceability records, and country-of-origin documentation. HS codes and import support documents are provided to facilitate customs clearance at destination.
Request a Technical Quotation for the FAG NN3026TN9/SPC1LW33 Double Row Cylindrical Roller Bearing
Send us your OEM equipment number or application parameters to confirm suffix compatibility and receive a lead-time estimate.
Contact our technical sales team through the inquiry channel listed on our company profile.
