Manufactured by CHG Bearing, the NN 3011 KTN/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 55 mm bore diameter, a 90 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 3011 KTN/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3011 KTN/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) | 55 mm |
| Width (B) | 26 mm |
| Outer Diameter (D) | 90 mm |
| Minimum Chamfer Dimension rmin | 1 mm |
| Inner Ring Chamfer | 1.1 mm |
| Outer Ring Chamfer | 0.6 mm |
| End-face Height Difference h | 1.5 mm |
| Inner-Ring Land Diameter (L1 / d1) | 68.2 mm |
| Outer Ring Raceway Diameter E | 81 mm |
| Shaft Shoulder Diameter dₐ, min. | 61.5 mm |
| Housing Shoulder Diameter Dₐ, min. | 82 mm |
| Housing Shoulder Diameter Dₐ, max. | 83.5 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 69.3 kN |
| Basic Static Load Rating C₀ (kN) | 96.5 kN |
| Limiting Speed – Grease (r/min) | 10000 r/min |
| Limiting Speed – Oil-air (r/min) | 12000 r/min |
| Reference Grease Quantity Gref (cm³) | 3.6 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 11.6 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 1220 N/µm |
| Material | |
| Lubrication Groove Width | 3.8 mm |
| Lubrication Holes (qty × Ø mm) | 2 |
| Weight (kg) | 0.579 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 79.7 |
NN 3011 KTN/SPW33 90 mm 55 mm 26 mm Frequently Asked Questions about NN 3011 KTN/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The Open Type engineered for NN 3011 KTN/SPW33 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
Standard batches of CHG Bearing NN 3011 KTN/SPW33 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
As standard production, CHG Bearing subjects NN 3011 KTN/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.
Every production batch of CHG Bearing NN 3011 KTN/SPW33 Super-Precision Cylindrical Roller Bearings comes with complete traceability. Upon shipment, CHG Bearing can provide EN 10204 3.1 Material Test Reports (MTR), Certificates of Conformity (CoC), spectral chemical composition analysis, and dimensional inspection sheets.
