Manufactured by CHG Bearing, the 71903 CD/P4ADBC is a precision Super-precision Angular Contact Ball Bearings. Key dimensional parameters include a 17 mm bore diameter, a 30 mm outer diameter, and a 14 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.
71903 CD/P4ADBC - Super-precision Angular Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 71903 CD/P4ADBC |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Angular Contact Ball Bearing |
| Number of Rows | 2 |
| Contact Type | Normal Contact (Two-point Contact) |
| Ring Type | Integral Inner and Outer Rings |
| Design | High-capacity D Design |
| Universally Matchable | No |
| Matched Arrangement | Back-to-back (DB) |
| Number of Bearings in Set | 2 |
| Axial Clearance / Preload | Medium Preload |
| Tolerance Class | P4A |
| Bearing Material | Bearing Steel |
| Sealing | Open |
| Dimensions | |
| Bore Diameter (d) | 17 mm |
| Width (B) | 14 mm |
| Outer Diameter (D) | 30 mm |
| Contact Angle α (°) | 15 ° |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 6.76 kN |
| Basic Static Load Rating C₀ (kN) | 4.15 kN |
| Material | |
| Weight (kg) | 0.035 kg |
71903 CD/P4ADBC 30 mm 17 mm 14 mm Frequently Asked Questions about 71903 CD/P4ADBC Super-precision Angular Contact Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies 71903 CD/P4ADBC with a precision bore diameter (d) of 17 mm, an outside diameter (D) of 30 mm, and a nominal ring width (B) of 14 mm. This configuration yields an effective cross-sectional wall thickness of 6.5 mm and an envelope ratio (D/d) of 1.76, delivering compact rigidity for OEM machinery housings.
Quality starts with raw material selection: CHG Bearing crafts 71903 CD/P4ADBC inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
To safeguard CHG Bearing 71903 CD/P4ADBC against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (17 mm x 30 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
To extend the trouble-free lifespan of CHG Bearing 71903 CD/P4ADBC, preventive maintenance routines should monitor operating housing temperature (normally maintaining below 70°C) and conduct regular vibration FFT analysis to identify early raceway micro-pitting before unexpected line halts occur.
