Manufactured by CHG Bearing, the NU3138 is a precision Single Row Cylindrical Roller Bearings. Key dimensional parameters include a 190 mm bore diameter, a 320 mm outer diameter, and a 104 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.
NU3138 - Single Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NU3138 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Single Row Cylindrical Roller Bearing |
| Number of Rows | Single Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 190 mm |
| Width (B) | 104 mm |
| Outer Diameter (D) | 320 mm |
| Bore Diameter Tolerance | -0.030 – 0 mm |
| Outside Diameter Tolerance | -0.040 – 0 mm |
| Width Tolerance | -0.30 – 0 mm |
| Enveloping Circle Diameter Fw | 223 mm |
| Inner Ring Chamfer | 3 min mm |
| Outer Ring Chamfer | 3 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 942 kN |
| Basic Static Load Rating C0 (kN) | 1570 kN |
| Material | |
| Mass (kg) | 34.5 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NU3138 320 mm 190 mm 104 mm 223 mm Frequently Asked Questions about NU3138 Single Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As standard production, CHG Bearing subjects NU3138 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Engineered according to international ISO boundary plans, CHG Bearing supplies NU3138 with a precision bore diameter (d) of 190 mm, an outside diameter (D) of 320 mm, and a nominal ring width (B) of 104 mm. This configuration yields an effective cross-sectional wall thickness of 65.0 mm and an envelope ratio (D/d) of 1.68, delivering compact rigidity for OEM machinery housings.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for NU3138. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Beyond standard alloy steel, CHG Bearing can customize the NU3138 Single Row 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.
