Manufactured by CHG Bearing, the NN 3018 KTN9/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 90 mm bore diameter, a 140 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 3018 KTN9/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3018 KTN9/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) | 90 mm |
| Width (B) | 37 mm |
| Outer Diameter (D) | 140 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) | 109.4 mm |
| Outer Ring Raceway Diameter E | 127 mm |
| Shaft Shoulder Diameter dₐ, min. | 98 mm |
| Housing Shoulder Diameter Dₐ, min. | 129 mm |
| Housing Shoulder Diameter Dₐ, max. | 132 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 138 kN |
| Basic Static Load Rating C₀ (kN) | 216 kN |
| Limiting Speed – Grease (r/min) | 6300 r/min |
| Limiting Speed – Oil-air (r/min) | 7000 r/min |
| Reference Grease Quantity Gref (cm³) | 11.1 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 26 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 2010 N/µm |
| Material | |
| Lubrication Groove Width | 5.5 mm |
| Lubrication Holes (qty × Ø mm) | 3 |
| Weight (kg) | 1.89 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 125.2 |
NN 3018 KTN9/SPW33 140 mm 90 mm 37 mm Frequently Asked Questions about NN 3018 KTN9/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Yes, 100% of NN 3018 KTN9/SPW33 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.
The CHG Bearing NN 3018 KTN9/SPW33 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for NN 3018 KTN9/SPW33. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Each NN 3018 KTN9/SPW33 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 (90 mm bore side) ensures perfect planar contact without edge binding.
