Description
Authorized-Channel Sourcing — Every INA HK3026 we handle ships with batch-level traceability back to the manufacturer’s production facilities and full anti-counterfeit verification support.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | INA HK3026 |
| Bearing Type | Drawn Cup Needle Roller Bearing, Open Type |
| Bore Diameter (Fw) | 30 mm |
| Outside Diameter (D) | 37 mm |
| Width (C) | 26 mm |
| Weight | 51.12 g |
| Style | Without Inner Ring, Without Outer Ring |
| Material | Bearing Steel |
| Load Direction | Radial |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Automotive & Heavy Vehicle Repair | Transmission input shafts, alternator support journals, steering column universal joints |
| Industrial Machinery | Packaging line conveyor drum pivots, textile machine rocker arms, compressor connecting rod small ends |
| Material Handling | Forklift mast roller guides, belt conveyor idler shaft supports, palletizer linkage pivots |
What Happens When a Drawn Cup Needle Bearing Fails Mid-Shift
A soft cup or counterfeit needle set can collapse under radial load without any prior warning — taking the shaft surface with it.
Counterfeit HK-series bearings are showing up in MRO supply chains across emerging industrial markets, often with drawn cups made from low-carbon steel that lacks the through-hardening needed for real raceway duty. The needles themselves may pass a visual check but deform under sustained radial load, jamming against the cage and scoring the shaft journal in the process. Maintenance crews then face not just a bearing replacement but a full shaft rework — an outcome that traces back to a single sourcing decision. [NEED_CITE: counterfeit bearing seizure and shaft damage failure mode per ISO 15243]
How the HK3026 Fits Compact Drivetrain Envelopes
The INA HK3026 needle roller bearing 30x37x26mm is engineered for applications where radial space is at a premium and the housing bore can serve directly as the outer raceway. Its open-type drawn cup presses straight into the housing, eliminating the need for a separate outer ring and keeping the cross-section at just 3.5 mm per side. We frequently cross-check this model against OEM equipment numbers from packaging machinery and automotive sub-assemblies to confirm that the 26 mm width matches the original load distribution requirement — narrower HK variants in the same Fw/D envelope cannot compensate for the shorter contact line.
Load, Speed, and Surface Finish Demands on the Shaft Journal
Because the HK3026 runs without an inner ring, the shaft itself becomes the inner raceway. That means the mating journal must be hardened to at least HRC 58 and ground to a surface finish suitable for rolling contact — typically Ra 0.2 µm or better. Radial loads in conveyor and gearbox applications are predominantly steady-state, but any shock loading from belt snatch or gear mesh impact transfers directly through the needle set. Lubrication is the responsibility of the surrounding system since the open type carries no seals or shields; oil mist or circulating oil reaching the needle-cage assembly is essential to prevent boundary lubrication at speed. [NEED_CITE: shaft hardness and surface finish requirements for needle bearings without inner ring]
Why the Drawn Cup and Needle Geometry Matter
The drawn cup on the HK3026 is formed from bearing steel and through-hardened to provide a raceway surface on its inner diameter. This cup serves double duty as both the structural housing and the outer raceway, which is why cup wall integrity is non-negotiable — any softness or seam defect leads to cup collapse under radial load. The full-complement needle arrangement (no cage in most HK open types) maximizes the number of rolling elements in the 30 mm bore, giving higher radial capacity than caged equivalents in the same envelope. The 26 mm width spreads load across a longer needle contact length, reducing Hertzian contact stress on both the cup and the shaft journal compared to shorter HK variants.
The Hidden Cost of a Substituted Needle Bearing
Swapping a genuine HK3026 for an unverified substitute that matches only the base number — but uses low-grade steel or incorrect needle diameter — does not show up on the bench. It shows up on the production floor as unplanned downtime, scored shafts, and in severe cases, catastrophic seizure that damages the entire sub-assembly. ISO 281 life calculations assume material quality and dimensional accuracy that off-spec products simply do not meet, meaning predicted L10 intervals become meaningless. The cost of one seized conveyor drum in a packaging line — lost output, emergency shaft machining, expedited freight for a genuine replacement — dwarfs any unit-price saving on the initial purchase. [NEED_CITE: bearing life calculation validity under ISO 281 requires verified material and geometry]
Why Procurement Engineers Source the HK3026 Through Us
Every INA HK3026 needle roller bearing 30x37x26mm we quote comes from authorized distributor channels, not from marketplace listings where counterfeit risk concentrates. We verify each batch against the manufacturer’s lot records and provide QR code verification pathways through the official INA app so buyers can confirm authenticity independently. When a maintenance team needs to substitute across brands, our cross-reference work checks needle diameter, cup wall thickness, and width — not just the base designation — to prevent the dimensional mismatches that cause field failures. Origin documentation is prepared for each shipment, smoothing customs clearance in markets where country-of-origin declarations are mandatory for industrial imports. Dimensional inspection reports covering Fw, D, and C are available before dispatch, giving receiving teams a quick verification checkpoint on arrival.
Documentation & Authenticity
- Supplier Certificate of Conformity tied to the specific HK3026 batch and lot number for full upstream traceability
- QR code on packaging scannable via the official INA app, confirming genuine production origin at the point of receipt
- Country-of-origin certificate prepared per shipment to satisfy import compliance in regulated industrial markets
- Third-party dimensional inspection report verifying Fw 30 mm, D 37 mm, and C 26 mm tolerances before dispatch
- Material certificate confirming bearing steel composition for the drawn cup and needle elements
Storage, Handling & Mounting
- Keep the HK3026 in its original sealed packaging until the moment of press-fit installation; premature exposure to humid workshop air risks surface corrosion on the drawn cup raceway
- Handle with clean, lint-free gloves — fingerprints on the needle surfaces create localized corrosion initiation points that propagate under rolling contact
- Press-fit the drawn cup into the housing bore using a flat mandrel against the cup’s closed end; driving on the open edge distorts the cup geometry and misaligns the needle set
- Ensure the shaft journal is hardened, ground, and free of burrs before assembly — the open-type design means any surface defect transfers directly to needle contact stress
- Apply the specified lubricant to the needle set and housing bore immediately before press-fit; the open type has no internal grease reserve and depends entirely on the external lubrication system
Request a Quotation with Full Technical Alignment
Share your operating parameters — radial load, shaft speed, housing bore tolerance, and lubrication method — so we can confirm the INA HK3026 needle roller bearing 30x37x26mm is dimensionally and functionally correct for your application. If you are replacing an existing bearing by OEM equipment number, provide that reference and we will run a cross-reference check covering needle count, cup thickness, and width alignment. Ask for the documentation package and batch availability in the same message to keep your procurement cycle moving.
Frequently Asked Questions
Q: How can I verify that my INA HK3026 is genuine before installation?
A: Scan the QR code on the packaging using the official INA app. The app cross-references the batch and serial data against the manufacturer’s production records. Additionally, check for consistent laser marking on the drawn cup and compare the needle surface finish against known genuine samples — counterfeit units often show visible grinding marks or inconsistent needle diameter.
Q: What shaft hardness is required when running the HK3026 without an inner ring?
A: The shaft journal must be through-hardened or case-hardened to a minimum of HRC 58, with a ground surface finish suitable for rolling contact. Soft or unfinished shafts will develop brinelling and accelerated wear, effectively destroying both the shaft and the needle set in a short operating window.
Q: Can I cross-reference the INA HK3026 to another brand’s needle bearing?
A: Cross-referencing is possible, but the substitute must match on needle diameter, cup wall thickness, cup material, and the 26 mm width — not just the base Fw/D dimensions. A mismatch in any of these parameters changes load distribution and contact stress, leading to premature cup or needle failure. We provide this full cross-brand comparison on request.
Q: What press-fit tolerance should the housing bore have for this drawn cup bearing?
A: The housing bore must be machined to the tolerance band specified in the INA catalog for drawn cup needle bearings of this D size. A bore that is too loose allows the cup to creep under load, while a bore that is too tight distorts the cup wall and restricts needle rotation.
Q: How should the open-type HK3026 be lubricated in service?
A: Lubrication is entirely the responsibility of the surrounding system since the open type carries no seals or grease fill. Oil mist, splash, or circulating oil must reach the needle-cage contact zone. Re-lubrication intervals depend on speed, load, and contamination exposure — consult the equipment OEM’s maintenance schedule.
Get Your INA HK3026 Quotation with Verified Documentation
Send us your application parameters or OEM equipment number, and we will respond with pricing, batch availability, lead time, and the full documentation package. Contact our technical sales team through the inquiry form or reach us directly at sales@bearing-sourcing.com.
