Manufactured by CHG Bearing, the 71938P4 is a precision Angular Contact Ball Bearings（718 / 719 SERIES）. Key dimensional parameters include a 190 mm bore diameter, a 260 mm outer diameter, and a 33 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.
71938P4 - Angular Contact Ball Bearings（718 / 719 SERIES）
Technical Specifications
| Overview | |
|---|---|
| Part Number | 71938P4 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Angular Contact Ball Bearing |
| Series | 719 |
| Seal Type | Open / Contact Seal Options |
| Load Direction | Radial |
| Row Configuration | Single Row |
| Dimensions | |
| Bore Diameter (d) | 190 mm |
| Width (B) | 33 mm |
| Outer Diameter (D) | 260 mm |
| Bore Diameter Tolerance | -0.012-0 mm |
| Outside Diameter Tolerance | -0.013-0 mm |
| Width Tolerance | -0.3-0 mm |
| Performance | |
| Basic Dynamic Radial Load Rating Cr (kN) | 139 kN |
| Basic Static Radial Load Rating C0r (kN) | 177 kN |
| Limiting Speed – Grease (r/min) | 5000 r/min |
| Limiting Speed – Oil (r/min) | 7500 (r/min) |
| Material | |
| Mass (kg) | 4.45 kg |
| Ring Material | Stainless Steel / Bearing Steel |
| Cage Material | Brass / PEEK / Polyimide / Phenolic Resin Fabric Laminate |
| Ball Material | Stainless Steel / Bearing Steel / Ceramic |
| Operating Temperature Range (°C) | -50 to +100 °C |
| Precision Class | P4 |
| Radial Internal Clearance | 0.025-0.071 mm |
71938P4 260 mm 190 mm 33 mm Frequently Asked Questions about 71938P4 Angular Contact Ball Bearings（718 / 719 SERIES）
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Absolutely. The CHG Bearing 71938P4 Angular Contact Ball Bearings（718 / 719 SERIES） is a 1:1 direct interchange for renowned brands, matching part numbers: SKF 71938P4, FAG 71938P4, NSK 71938P4. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
When fitting 71938P4 over a 190 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.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 71938P4, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
Standard batches of CHG Bearing 71938P4 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
