| Part Number | NUP 3988 ECM |
| System of Measurement | Metric |
| Roller Bearing Type | Cylindrical |
| For Load Direction | Combined Radial and Thrust |
| Construction | Single Row |
| Inner Ring Type | With Inner Ring |
| Seal Type | Open |
| Bore Dia | 440 mm |
| Bore Dia Tolerance | -0.045mm to 0 |
| Outer Dia | 600 mm |
| Outer Dia Tolerance | -0.05mm to 0 |
| Width | 118 mm |
| Width Tolerance | -0.45mm to 0 |
| Shoulder Diameter Of Inner Ring | 495 mm |
| Shoulder Diameter Of Outer Ring | 552 mm |
| Raceway Diameter Of Inner Ring | 481 mm |
| Chamfer Dimension r1,2(min.) | 4 mm |
| Ring Material | 52100 Chrome Steel |
| Roller Material | 52100 Chrome Steel |
| Cage Material | PA66 cage, roller centred |
| Dynamic Load Rating | 1980 kN |
| Static Load Rating | 4250 kN |
| Max Speed (X1000 rpm) | 1 |
| Lubrication | Grease, Oil |
| Temperature Range | -30° to 110 °C |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 105 kg |
Aubearing is an ISO certified Chinese bearing manufacturer and supplier. Competitive prices, 1,200,000+ SKU inventory, including internationally renowned brands such as SKF, Timken, Schaeffler (FAG, INA), NSK, KOYO, NTN, McGill, etc. Aubearing has invested in 300+ equipment, heat treatment facilities, lathes, grinders, milling machines, bearing production lines, CMMs, metallographic testers, etc. Leading Time<7 Days, MOQ=1.
Various types of ball bearings and roller bearings, size range: 1mm-2000mm. Including thin section bearings (KAYDON equivalents and 67, 68, 69 series), ceramic bearings, stainless steel bearings, deep groove ball bearings, angular contact bearings, thrust ball bearings, spherical roller bearings, cylindrical roller bearings, needle roller bearings, tapered roller bearings, precision crossed roller bearings, bushings (sleeve bearings), linear bearings, automotive wheel hub bearings and corresponding inch series.
Customization options: material (Gcr15, silicon nitride, silicon carbide, zirconium oxide, aluminum oxide, stainless steel 304, 316, 420, 440, PTFE\PEEK\nylon and other plastics), cage (brass, stamping steel, retainer), lubrication (lubricating oil, grease, high temperature resistance), clearance (C2\CN\C3\C4\C5), seal (nitrile rubber, silicone rubber, fluororubber, polypropylene rubber), shielding, etc.