Manufactured by CHG Bearing, the NN 3012 TN/SP is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 60 mm bore diameter, a 95 mm outer diameter, and a 26 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
NN 3012 TN/SP - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3012 TN/SP |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Cylindrical Roller Bearing |
| Design Type | Cylindrical Bore |
| Structure (Drawing Reference) | Complete Bearing |
| Number of Rows | 2 |
| Ring Type | None |
| Design | NN Design |
| Tolerance Class | SP |
| Bearing Material | Bearing Steel |
| Coating | None |
| Sealing | None |
| Lubricant | None |
| Features | None |
| Number of Flanges – Outer Ring | 0 |
| Number of Ribs – Inner Ring | 3 |
| Dimensions | |
| Bore Diameter (d) | 60 mm |
| Width (B) | 26 mm |
| Outer Diameter (D) | 95 mm |
| Minimum Chamfer Dimension rmin | 1 mm |
| Inner Ring Chamfer | 1.1 mm |
| End-face Height Difference h | 1.5 mm |
| Inner-Ring Land Diameter (L1 / d1) | 73.3 mm |
| Outer Ring Raceway Diameter E | 86.1 mm |
| Shaft Shoulder Diameter dₐ, min. | 66.5 mm |
| Housing Shoulder Diameter Dₐ, min. | 87 mm |
| Housing Shoulder Diameter Dₐ, max. | 88.5 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 73.7 kN |
| Basic Static Load Rating C₀ (kN) | 106 kN |
| Limiting Speed – Grease (r/min) | 9500 r/min |
| Limiting Speed – Oil-air (r/min) | 11000 r/min |
| Reference Grease Quantity Gref (cm³) | 3.8 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 12.7 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 1330 N/µm |
| Material | |
| Weight (kg) | 0.643 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 84.9 |
NN 3012 TN/SP 95 mm 60 mm 26 mm Frequently Asked Questions about NN 3012 TN/SP Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
For international ocean and air freight, CHG Bearing packs NN 3012 TN/SP with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing NN 3012 TN/SP correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
Built for demanding industrial environments, the NN 3012 TN/SP Super-Precision Cylindrical Roller Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
The CHG Bearing NN 3012 TN/SP is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
