Manufactured by CHG Bearing, the NN 3020 KTN9/VM1271 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 100 mm bore diameter, a 150 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 3020 KTN9/VM1271 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3020 KTN9/VM1271 |
| 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) | 100 mm |
| Width (B) | 37 mm |
| Outer Diameter (D) | 150 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) | 119.4 mm |
| Outer Ring Raceway Diameter E | 137 mm |
| Shaft Shoulder Diameter dₐ, min. | 108 mm |
| Housing Shoulder Diameter Dₐ, min. | 139 mm |
| Housing Shoulder Diameter Dₐ, max. | 142 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 151 kN |
| Basic Static Load Rating C₀ (kN) | 250 kN |
| Limiting Speed – Grease (r/min) | 5600 r/min |
| Limiting Speed – Oil-air (r/min) | 6300 r/min |
| Reference Grease Quantity Gref (cm³) | 11.9 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 29 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 2350 N/µm |
| Material | |
| Weight (kg) | 2.1 kg |
| Radial Internal Clearance | NSTD mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 135.2 |
NN 3020 KTN9/VM1271 150 mm 100 mm 37 mm Frequently Asked Questions about NN 3020 KTN9/VM1271 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To ensure optimum performance of CHG Bearing NN 3020 KTN9/VM1271 Super-Precision Cylindrical Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 100 mm bore. For the 150 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing NN 3020 KTN9/VM1271 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.
In its sealed configuration (Open Type), CHG Bearing pre-charges NN 3020 KTN9/VM1271 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
Absolutely. The CHG Bearing NN 3020 KTN9/VM1271 Super-Precision Cylindrical Roller Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF NN 3020 KTN9/VM1271, FAG NN 3020 KTN9/VM1271, NSK NN 3020 KTN9/VM1271. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
