Manufactured by CHG Bearing, the NN 3021 KTN9/SP is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 105 mm bore diameter, a 160 mm outer diameter, and a 41 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 3021 KTN9/SP - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3021 KTN9/SP |
| 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 | None |
| Number of Flanges – Outer Ring | 0 |
| Number of Ribs – Inner Ring | 3 |
| Dimensions | |
| Bore Diameter (d) | 105 mm |
| Width (B) | 41 mm |
| Outer Diameter (D) | 160 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2 mm |
| Outer Ring Chamfer | 1.1 mm |
| End-face Height Difference h | 2 mm |
| Inner-Ring Land Diameter (L1 / d1) | 125.2 mm |
| Outer Ring Raceway Diameter E | 146 mm |
| Shaft Shoulder Diameter dₐ, min. | 115 mm |
| Housing Shoulder Diameter Dₐ, min. | 148 mm |
| Housing Shoulder Diameter Dₐ, max. | 150 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 190 kN |
| Basic Static Load Rating C₀ (kN) | 305 kN |
| Limiting Speed – Grease (r/min) | 5300 r/min |
| Limiting Speed – Oil-air (r/min) | 6000 r/min |
| Reference Grease Quantity Gref (cm³) | 17 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 36 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 2330 N/µm |
| Material | |
| Weight (kg) | 2.66 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 143.9 |
NN 3021 KTN9/SP 160 mm 105 mm 41 mm Frequently Asked Questions about NN 3021 KTN9/SP Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Quality starts with raw material selection: CHG Bearing crafts NN 3021 KTN9/SP inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
To match diverse operational dynamics, CHG Bearing supplies NN 3021 KTN9/SP 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.
Absolutely. The CHG Bearing NN 3021 KTN9/SP Super-Precision Cylindrical Roller Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF NN 3021 KTN9/SP, FAG NN 3021 KTN9/SP, NSK NN 3021 KTN9/SP. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
Yes, 100% of NN 3021 KTN9/SP Super-Precision Cylindrical Roller Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
