Description
Genuine SKF Sourcing — Each SKF N1015KPHA/HC5SP super-precision cylindrical roller bearing is procured through authorized SKF distributor channels, with batch-level traceability documentation and QR code verification pathway via the SKF official app before shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SKF N1015KPHA/HC5SP |
| Bearing Type | Super-Precision Single Row Cylindrical Roller Bearing |
| Bore Diameter (d) | 75 mm |
| Outside Diameter (D) | 115 mm |
| Weight | 0.74 kg |
| Precision Class | SP / UP |
| Number of Rows | Single Row |
| Seal or Shield Type | Open |
| Structure | Cylindrical |
| Bore Type | Tapered Bore 1:12 (K suffix) |
| Origin | China |
| Standards | ISO 15 / ISO 492 |
Note: The suffixes PHA and HC5 require confirmation against the latest SKF super-precision catalog for exact cage material and ceramic hybrid specification before final order placement.
Application Suitability
| Industry | Typical Applications |
|---|---|
| Machine Tool Manufacturing | High-speed spindle units requiring SP-class running accuracy and rigid radial support |
| Precision Gearboxes | High-speed gear shafts in indexing heads and feed drive transmissions |
| Rolling Mills | Guide roll and pinch roll positions demanding tight dimensional stability under thermal cycling |
| High-Speed Rotating Equipment | Turbo-compressor and test rig shafts operating above 15,000 rpm with oil-air lubrication |
When SP Precision Is Not Enough — The Suffix Trap on Spindle Rebuilds
A base number match without suffix verification is the single most common cause of thermal binding in super-precision spindle applications.
I still remember the N1020 rebuild at a Vietnamese machine tool plant — the base designation was correct, but nobody checked the tapered bore sleeve fit or the P4 suffix. The bearing seated unevenly, ran hot within a week, and the spindle threw vibration alarms across the entire shop floor. That failure was not a bearing defect; it was a suffix mismatch. With the SKF N1015KPHA/HC5SP, the SP precision class demands tighter running accuracy than P5, and the K tapered bore requires precise axial drive-in to achieve the correct residual clearance. Substituting a standard CN clearance or ignoring the 1:12 taper angle will destroy the preload window designed into the spindle housing. [NEED_CITE: super-precision bearing mounting guidelines per SKF catalog]
How This Bearing Matches High-Rigidity Spindle Environments
The SKF N1015KPHA/HC5SP is engineered for applications where radial stiffness and rotational accuracy cannot be compromised. The 75 mm bore with 1:12 taper allows direct interference fit on precision-ground tapered shaft seats — eliminating adapter sleeve runout that would otherwise degrade spindle performance. The SP precision class ensures running accuracy tighter than P5, critical for surface finish quality in CNC turning and milling operations. The open design gives maintenance engineers full control over lubrication strategy, whether oil-air, oil mist, or high-speed grease, without the friction penalty of integrated seals.
Operating Environment and Performance Demands on the Shaft
Super-precision spindle duty subjects this bearing to continuous radial load at elevated speeds, often exceeding 15,000 rpm with oil-air lubrication. Thermal expansion is the dominant enemy — the SP tolerance class and controlled internal geometry minimize dimensional drift as the spindle warms up during extended cutting cycles. The open configuration means contamination protection depends entirely on the housing seal design; in dusty grinding environments, external labyrinth seals become mandatory. Mounting via induction heating or hydraulic methods must respect the 1:12 taper ratio — over-driving the bearing onto the shaft eliminates residual clearance and guarantees premature cage stress. [NEED_CITE: tapered bore mounting procedures for super-precision cylindrical roller bearings]
Decoding the Critical Suffixes on This Designation
The K suffix indicates a 1:12 tapered bore, which enables direct mounting on tapered journal seats for secure interference fit without additional adapter sleeves — this eliminates a potential source of runout in high-speed applications. The SP precision class sits between P5 and P4 in the ISO 492 hierarchy, offering tighter dimensional and running accuracy than P5 while remaining more cost-effective than full P4 for applications that do not demand the absolute tightest tolerances. The single-row cylindrical roller design provides high radial load capacity within a compact 75 × 115 mm cross-section, while the open structure allows the end user to select the optimal lubrication method for the specific speed and temperature regime. The HC5 suffix typically denotes hybrid ceramic rolling elements — silicon nitride balls or rollers that reduce centrifugal forces at extreme speeds and extend grease life — though exact specification should be confirmed against the current SKF catalog.
The Hidden Cost of Getting the Suffix Wrong
Selecting a bearing by base number alone while ignoring precision class, bore type, or cage material leads to failures that cost far more than the bearing itself. A P0 or P6 grade substituted for SP on a spindle application will produce unacceptable vibration and surface finish defects. A standard cylindrical bore forced onto a tapered shaft without the correct sleeve will create uneven loading and rapid fatigue spalling. Counterfeit or unverified units with soft inner rings or cloned QR codes may pass casual visual inspection but fail catastrophically under spindle speeds, potentially destroying the shaft and housing. Per ISO 15243, these failures fall into categories of mounting damage and inadequate lubrication — both traceable to specification errors rather than manufacturing defects. [NEED_CITE: rolling bearing failure mode classification per ISO 15243]
Why Procurement Engineers Trust Our Sourcing Process
Every SKF N1015KPHA/HC5SP we supply is procured through authorized SKF distributor channels, not through unverified trading intermediaries. We provide batch-level traceability documentation linking each unit to its production lot, enabling QR code verification through the SKF official app. Our cross-reference database matches not just the base designation but also precision class, bore taper, and cage type — preventing the suffix mismatches that cause field failures. For import compliance, we supply country-of-origin documentation and HS code classification support. Each shipment includes a Certificate of Conformity and can be accompanied by third-party dimensional inspection reports confirming bore, OD, and running accuracy before dispatch.
Documentation & Authenticity
- SKF Certificate of Conformity with batch and lot traceability for each N1015KPHA/HC5SP unit
- QR code verification pathway via SKF official app for anti-counterfeit authentication
- Third-party dimensional inspection report confirming SP-class running accuracy and tapered bore angle before shipment
- Country-of-origin documentation supporting import compliance and customs clearance
- Material certificate and heat treatment traceability for the bearing rings and rolling elements
- HS code classification and import documentation support for cross-border procurement
Storage, Handling & Mounting
- Keep the SKF N1015KPHA/HC5SP in original sealed packaging until mounting day; the SP precision surfaces are vulnerable to corrosion and handling marks if exposed prematurely in humid environments
- Use clean lint-free gloves when handling this open-type bearing; fingerprints on the raceway can initiate corrosion spots that degrade running accuracy at spindle speeds
- For the 1:12 tapered bore, calculate axial drive-in distance carefully — over-driving eliminates residual clearance and causes thermal binding, while under-driving creates looseness and vibration
- Mounting via induction heating is acceptable for the inner ring, but temperature must not exceed 120°C to preserve the dimensional stability of the SP-precision rings
- As an open-type bearing, the N1015KPHA/HC5SP requires external sealing in the housing; verify labyrinth or contact seal compatibility with the lubrication method before assembly
- Store horizontally in original packaging to prevent false brinelling on the roller elements during extended warehouse periods
Ready to Verify Specifications and Confirm Availability
Share your spindle or gearbox application parameters — load, speed, temperature, and mounting envelope — and we will perform technical selection review including suffix verification and cross-reference matching. Provide the OEM equipment number if you are replacing an existing unit, and we will confirm dimensional and precision compatibility before quotation. We can also supply the full documentation package including origin certificates and third-party inspection reports for your import compliance review.
Frequently Asked Questions
Q: How can I verify the authenticity of the SKF N1015KPHA/HC5SP bearing?
A: Each genuine SKF bearing carries a unique QR code that can be scanned using the SKF official app for authentication. We also provide batch traceability documentation linking the unit to its production lot, and third-party inspection reports are available upon request.
Q: What does the SP precision class mean compared to P4 and P5?
A: SP (Super Precision) is an SKF-specific class that sits between P5 and P4 in the ISO 492 tolerance hierarchy. It offers tighter dimensional and running accuracy than P5, making it suitable for machine tool spindles and precision gearboxes, while remaining more economical than full P4 for applications that do not require the absolute tightest tolerances.
Q: What is the significance of the K suffix on this bearing?
A: The K suffix indicates a 1:12 tapered bore, which allows direct mounting on precision-ground tapered shaft seats without adapter sleeves. This eliminates a potential source of runout in high-speed applications and enables precise control of residual clearance through axial drive-in distance.
Q: Can I cross-reference this SKF bearing to other brands like NSK or FAG?
A: Yes, we maintain a cross-reference database covering SKF, NSK, FAG, TIMKEN, NTN, and KOYO. However, cross-referencing super-precision bearings requires matching not just the base designation but also precision class, bore taper, cage type, and internal clearance — we verify all these parameters before confirming interchangeability.
Q: What do the PHA and HC5 suffixes mean on this designation?
A: These suffixes require confirmation against the latest SKF super-precision catalog. HC5 typically denotes hybrid ceramic rolling elements (silicon nitride), while PHA may indicate a specific cage material or design. We recommend verifying these specifications with the manufacturer before final order placement.
Get Your SKF N1015KPHA/HC5SP Specification Confirmed
Send us your application parameters or OEM equipment number, and we will return a technical selection review with suffix verification, cross-reference matching, and full documentation availability within one business day.
