Manufactured by CHG Bearing, the NNUP4868 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 340 mm bore diameter, a 420 mm outer diameter, and a 80 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.
NNUP4868 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNUP4868 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 340 mm |
| Width (B) | 80 mm |
| Outer Diameter (D) | 420 mm |
| Bore Diameter Tolerance | -0.040 – 0 mm |
| Outside Diameter Tolerance | -0.045 – 0 mm |
| Width Tolerance | -0.40 – 0 mm |
| Enveloping Circle Diameter Fw | 366 mm |
| Inner Ring Chamfer | 2.1 min mm |
| Outer Ring Chamfer | 2.1 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 757 kN |
| Basic Static Load Rating C0 (kN) | 2030 kN |
| Material | |
| Mass (kg) | 25.4 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
| Lubrication Groove Width | 16.7 mm |
| Lubrication Holes (qty × Ø mm) | 3 × Ø5 |
NNUP4868 420 mm 340 mm 366 mm 80 mm Frequently Asked Questions about NNUP4868 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Yes, 100% of NNUP4868 Double Row Cylindrical Roller Bearings 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 safeguard CHG Bearing NNUP4868 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (340 mm x 420 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for NNUP4868, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
The Open Type engineered for NNUP4868 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
