Manufactured by CHG Bearing, the 61938 is a precision Deep Groove Ball Bearings（618 / 619 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.
61938 - Deep Groove Ball Bearings（618 / 619 SERIES）
Technical Specifications
| Overview | |
|---|---|
| Part Number | 61938 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Deep Groove Ball Bearing |
| 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 | -0.03-0 mm |
| Outside Diameter Tolerance | -0.035-0 mm |
| Width Tolerance | -0.3-0 mm |
| Performance | |
| Basic Dynamic Radial Load Rating Cr (kN) | 117 kN |
| Basic Static Radial Load Rating C0r (kN) | 133 kN |
| Limiting Speed – Grease (r/min) | 2200 r/min |
| Limiting Speed – Oil (r/min) | 2800 (r/min) |
| Material | |
| Mass (kg) | 5.18 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 | P0 |
| Radial Internal Clearance | 0.025-0.071 mm |
61938 260 mm 190 mm 33 mm Frequently Asked Questions about 61938 Deep Groove Ball Bearings（618 / 619 SERIES）
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Yes, 100% of 61938 Deep Groove Ball Bearings（618 / 619 SERIES） 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.
To extend the trouble-free lifespan of CHG Bearing 61938, 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.
To safeguard CHG Bearing 61938 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (190 mm x 260 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Every production batch of CHG Bearing 61938 Deep Groove Ball Bearings（618 / 619 SERIES） comes with complete traceability. Upon shipment, CHG Bearing can provide EN 10204 3.1 Material Test Reports (MTR), Certificates of Conformity (CoC), spectral chemical composition analysis, and dimensional inspection sheets.
