NNU49/670-S-M-C3 With Size 670x900x230 mm Super Precision Double Row Cylindrical Roller Bearings
Overview
Double row cylindrical roller bearing; It is cylindrical bore, separable, Non-locating bearings; Outer ring with three rigid ribs, inner ring without ribs, lubrication groove and lubrication holes in the outer ring, brass double comb cage; C3 radial internal clearance.
Suffix meaning
S-Lubrication holes and a lubrication groove in the outer ring
M-Solid brass cage, roller guided
C3-Radial internal clearance
Bore diameter-670 mm; Outside diameter-900 mm; Width-230 mm; Mass-421 kg; Cr=5000 kN; C0r=13400 kN; Limiting speed for grease lubrication is 700 1/min; Limiting speed for oil lubrication is 1220 1/min.
The Extended same type with different suffixes NNU49/670MAW33; NNU49/670; NNU49/670-S-M-SP-C3; NNU 49/670 B/SPC3W33X;NNU49/670K are also ready in stock for your machine application needs.
Specifications
| Dimensions &Technical Datasheets | |
| Part NO. | NNU49/670-S-M-C3-Super Precision Double-Row Cylindrical Roller Bearings |
| Brand | FAG is made in Germany, and the SDVV brand is made in China |
| Main Dimensions | 670x900x230 mm |
| d | 670 mm |
| D | 900 mm |
| B | 230 mm |
| Limiting speed for grease lubrication | 700 1/min |
| da | 693 mm |
| Da | 877 mm |
| Cr | 5000 kN |
| C0r | 13400 kN |
| M | 421 kg |
Bearing Application
The NNU49/670-S-M-C3 bearing is suitable for industrial applications requiring high temperatures, heavy loads, and high rigidity, particularly as a core support component in rolling mills and paper machinery.
Its design optimizes lubrication performance and assembly stability. When combined with appropriate sealing and lubrication solutions (such as oil-air lubrication), it can significantly improve equipment lifespan and operating efficiency. If used in a vertical mounting configuration, attention must also be paid to the sealing direction to prevent oil leakage or contamination.
1. Steel Rolling Machinery: Hot/Cold Rolling Mill Roll Systems - Subjected to extremely high radial forces, requiring impact resistance and high rigidity; often used in combination with thrust bearings.
2. Papermaking Machinery: Paper Calendering Rolls, Drying Cylinder Supports - Maintain stability at high operating speeds and resist the effects of humid and hot environments.
3. Heavy-Duty Transmission Devices: Large Gearboxes, Reducers - Support long shaft structures, compensate for minor misalignments, and C3 clearance accommodates temperature rise.
4. Power Generation and Mining Equipment: Wind Turbine Main Shaft Auxiliary Supports, Mining Mills - Provide reliable support under harsh operating conditions, extending maintenance cycles.
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