Manufactured by CHG Bearing, the NN 3018 TN9/SP is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 90 mm bore diameter, a 140 mm outer diameter, and a 37 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 3018 TN9/SP - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3018 TN9/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) | 90 mm |
| Width (B) | 37 mm |
| Outer Diameter (D) | 140 mm |
| Minimum Chamfer Dimension rmin | 1.5 mm |
| Inner Ring Chamfer | 1.5 mm |
| End-face Height Difference h | 2 mm |
| Inner-Ring Land Diameter (L1 / d1) | 109.4 mm |
| Outer Ring Raceway Diameter E | 127 mm |
| Shaft Shoulder Diameter dₐ, min. | 98 mm |
| Housing Shoulder Diameter Dₐ, min. | 129 mm |
| Housing Shoulder Diameter Dₐ, max. | 132 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 138 kN |
| Basic Static Load Rating C₀ (kN) | 216 kN |
| Limiting Speed – Grease (r/min) | 6300 r/min |
| Limiting Speed – Oil-air (r/min) | 7000 r/min |
| Reference Grease Quantity Gref (cm³) | 11.1 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 26 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 2010 N/µm |
| Material | |
| Weight (kg) | 1.94 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 125.2 |
NN 3018 TN9/SP 140 mm 90 mm 37 mm Frequently Asked Questions about NN 3018 TN9/SP Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To extend the trouble-free lifespan of CHG Bearing NN 3018 TN9/SP, preventive maintenance routines should monitor operating housing temperature (normally maintaining below 70°C) and conduct regular vibration FFT analysis to identify early raceway micro-pitting before unexpected line halts occur.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing NN 3018 TN9/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.
Each NN 3018 TN9/SP produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (90 mm bore side) ensures perfect planar contact without edge binding.
Built for demanding industrial environments, the NN 3018 TN9/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.
