Manufactured by CHG Bearing, the NN 3011 TN/SP 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 TN/SP - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3011 TN/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) | 55 mm |
| Width (B) | 26 mm |
| Outer Diameter (D) | 90 mm |
| Minimum Chamfer Dimension rmin | 1 mm |
| Inner Ring Chamfer | 1.1 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 | |
| Weight (kg) | 0.614 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 TN/SP 90 mm 55 mm 26 mm Frequently Asked Questions about NN 3011 TN/SP Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Built for demanding industrial environments, the NN 3011 TN/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.
Each NN 3011 TN/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 (55 mm bore side) ensures perfect planar contact without edge binding.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for NN 3011 TN/SP, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
When fitting NN 3011 TN/SP over a 55 mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
