Manufactured by CHG Bearing, the NN 3018 KTN3/SPW33 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 KTN3/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3018 KTN3/SPW33 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Cylindrical Roller Bearing |
| Design Type | Tapered Bore 1:12 |
| 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 | Annular Lubrication Groove and Lubrication Holes |
| 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 |
| Outer Ring Chamfer | 1 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) | 8000 r/min |
| Limiting Speed – Oil-air (r/min) | 9200 r/min |
| Recommended Grease Quantity Grec (cm³) | 6.1 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 26 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 2010 N/µm |
| Material | |
| Lubrication Groove Width | 5.5 mm |
| Lubrication Holes (qty × Ø mm) | 3 |
| Weight (kg) | 1.93 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 125.7 |
NN 3018 KTN3/SPW33 140 mm 90 mm 37 mm Frequently Asked Questions about NN 3018 KTN3/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As standard production, CHG Bearing subjects NN 3018 KTN3/SPW33 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for NN 3018 KTN3/SPW33, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
Built for demanding industrial environments, the NN 3018 KTN3/SPW33 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.
To match diverse operational dynamics, CHG Bearing supplies NN 3018 KTN3/SPW33 with multiple cage configurations: high-strength pressed steel ribbon cages for standard duty, solid machined brass cages (M/CA) for heavy vibration and shock loads, or lightweight glass-fiber reinforced polyamide cages (TN9/TVP) for high acceleration and ultra-low noise.
