Manufactured by CHG Bearing, the N 1008 KPHA/HC5SP is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 40 mm bore diameter, a 68 mm outer diameter, and a 15 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.
Technical Specifications
| Overview | |
|---|---|
| Part Number | N 1008 KPHA/HC5SP N 1008 KPHA/HC5SP |
| Brand | CHG® CHG® |
| Characteristics | |
| Bearing Type | Super-precision Cylindrical Roller Bearing Super-precision Cylindrical Roller Bearing |
| Design Type | Tapered Bore 1:12 Tapered Bore 1:12 |
| Structure (Drawing Reference) | Complete Bearing Complete Bearing |
| Number of Rows | 1 1 |
| Ring Type | None None |
| Tolerance Class | SP SP |
| Bearing Material | Composite Material Composite Material |
| Coating | None None |
| Sealing | None None |
| Lubricant | None None |
| Features | None None |
| Number of Flanges – Outer Ring | 0 0 |
| Number of Ribs – Inner Ring | 2 2 |
| Dimensions | |
| Bore Diameter (d) | 40 mm |
| Width (B) | 15 mm |
| Outer Diameter (D) | 68 mm |
| Minimum Chamfer Dimension rmin | 1 mm |
| Inner Ring Chamfer (min.) | 0.6 mm |
| End-face Height Difference h | 2 mm |
| Inner-Ring Land Diameter (L1 / d1) | 50.6 mm |
| Outer Ring Raceway Diameter E | 61 mm |
| Shaft Shoulder Diameter dₐ, min. | 45 mm |
| Housing Shoulder Diameter Dₐ, min. | 62 mm |
| Housing Shoulder Diameter Dₐ, max. | 63 mm |
| Performance | |
| Basic Dynamic Load Rating C | 23.3 kN 5.24 klbf |
| Basic Static Load Rating C₀ | 25 kN 5.62 klbf |
| Limiting Speed – Grease | 32000 r/min 32000 r/min |
| Limiting Speed – Oil-air | 38000 r/min 38000 r/min |
| Reference Grease Quantity Gref (cm³) | 3.1 cm³ 3.1 cm³ |
| Fatigue Load Limit Pᵤ | 2.45 kN 0.55 klbf |
| Axial Static Stiffness – Guideline Value (N/µm) | 510 N/µm 510 N/µm |
| Material | |
| Weight | 0.188 kg 0.4145 lb |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Non-metallic Cage Non-metallic Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 52.1 52.1 |
N 1008 KPHA/HC5SP 68 mm 40 mm 15 mm Frequently Asked Questions about N 1008 KPHA/HC5SP Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies N 1008 KPHA/HC5SP with a precision bore diameter (d) of 40 mm, an outside diameter (D) of 68 mm, and a nominal ring width (B) of 15 mm. This configuration yields an effective cross-sectional wall thickness of 14.0 mm and an envelope ratio (D/d) of 1.7, delivering compact rigidity for OEM machinery housings.
To ensure optimum performance of CHG Bearing N 1008 KPHA/HC5SP Super-Precision Cylindrical Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 40 mm bore. For the 68 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
Beyond standard alloy steel, CHG Bearing can customize the N 1008 KPHA/HC5SP Super-Precision Cylindrical Roller Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing N 1008 KPHA/HC5SP 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.
