Manufactured by CHG Bearing, the NN 3034/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 170 mm bore diameter, a 260 mm outer diameter, and a 67 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 3034/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3034/SPW33 |
| 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 | Annular Lubrication Groove and Lubrication Holes |
| Number of Flanges – Outer Ring | 0 |
| Number of Ribs – Inner Ring | 3 |
| Dimensions | |
| Bore Diameter (d) | 170 mm |
| Width (B) | 67 mm |
| Outer Diameter (D) | 260 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2.1 mm |
| End-face Height Difference h | 2.5 mm |
| Inner-Ring Land Diameter (L1 / d1) | 204 mm |
| Outer Ring Raceway Diameter E | 236 mm |
| Shaft Shoulder Diameter dₐ, min. | 181 mm |
| Housing Shoulder Diameter Dₐ, min. | 238 mm |
| Housing Shoulder Diameter Dₐ, max. | 249 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 457 kN |
| Basic Static Load Rating C₀ (kN) | 815 kN |
| Limiting Speed – Grease (r/min) | 3200 r/min |
| Limiting Speed – Oil-air (r/min) | 3600 r/min |
| Reference Grease Quantity Gref (cm³) | 105 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 83 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 3790 N/µm |
| Material | |
| Lubrication Groove Width | 8.9 mm |
| Lubrication Holes (qty × Ø mm) | 4.5 |
| Weight (kg) | 12.7 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 230.8 |
NN 3034/SPW33 260 mm 170 mm 67 mm Frequently Asked Questions about NN 3034/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Sourcing NN 3034/SPW33 directly from CHG Bearing eliminates intermediate brokerage markups while granting you factory-direct engineering backup, rigorous ISO-certified quality assurance, competitive volume wholesale pricing, and dependable supply chain stability for Super-Precision Cylindrical Roller Bearings.
When fitting NN 3034/SPW33 over a 170 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.
The Open Type engineered for NN 3034/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.
To safeguard CHG Bearing NN 3034/SPW33 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (170 mm x 260 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
