Wholesale NN3020 NN3020K Super Precision Roller Bearing 100x150x37mm Double Row Cylindrical Bearing With W33 Option
- NN3020 is a double-row super precision cylindrical roller bearing with straight inner bore, dimension 100×150×37mm. It adopts NN structural design with double ribs on inner ring and rib-free separable outer ring, which enables easy assembly and disassembly. This bearing bears heavy pure radial loads and delivers ultra-high rigidity, supporting high-precision stable rotation at medium-high speed. Optional W33 lubriion groove, brass cage and P4/P5 high precision grades are available. It is the core spindle bearing widely applied to CNC lathes, grinding machines and other precision machining equipment.
*Send inquiry to get complete technical datasheet and factory price of NN3020 spindle bearing.
| Specifiion | Value |
|---|---|
| Bearing Model | NN3020 |
| Bore d | 100 mm |
| Outer Diameter D | 150 mm |
| Width B | 37 mm |
| Min chamfer r | 1.5 mm |
| Outer ring raceway diameter EW | 137 mm |
| Basic dynamic load Cr | 193 kN |
| Basic static load C0r | 265 kN |
| Limiting speed (Grease) | 6800 r/min |
| Limiting speed (Oil) | 8300 r/min |
| Approximate weight | 2.08 kg |
| Optional upgrade | W33 (outer ring lubriion groove & oil holes), brass cage TN9/MB |
- Double-row cylindrical roller structure, ultra-high radial load capacity and outstanding rigidity
- NN separable design: outer ring can be detached separately, convenient for spindle installation and maintenance
- Straight bore standard; tapered bore NN3020K (1:12 taper) is optional for adapter sleeve mounting
- Open type design, match centralized oil supply system; W33 version with outer ring lubriion groove & oil holes
- Multiple precision grades P0/P5/P4 to meet different precision machining requirements
- Brass or polyamide cage options, low friction and stable high-speed operation
- CNC machine tool main spindles
- Precision internal & external grinding machines
- High-speed precision lathes
- Rotary tables for automation equipment
- Textile high-speed spinning spindles
- Precision testing rotary machinery
- High-purity GCr15 bearing steel with strict heat treatment to guarantee hardness, wear resistance and dimensional stability.
- Superfine grinding for raceways and rollers, strict precision inspection to reach P4 high precision standard.
- Complete specifiions: straight bore NN3020, tapered bore NN3020K, W33 lubriion type and different cage materials.
- Sufficient stock for precision spindle bearings, support sample testing and bulk wholesale with fast delivery.
- Professional technical team provides spindle matching consultation, OEM laser marking and customized packaging service.
*Contact our engineer to select precision grade, cage type and W33 version for your machine spindle.
Q1: What are the dimensions of NN3020?
A1: Bore 100mm, Outer diameter 150mm, Width 37mm.
Q2: What is the difference between NN3020 and NN3020K?
A2: NN3020 is straight bore; NN3020K has 1:12 tapered bore for installation with adapter sleeves.
Q3: Can this bearing bear axial load?
A3: It is mainly for heavy radial load, can only withstand tiny incidental axial force.
Q4: What does W33 mean?
A4: W33 means outer ring with annular lubriion groove and oil holes for continuous lubriion.
Q5: Is the outer ring separable?
A5: Yes, NN structure outer ring can be separated independently for easy assembly.
*Large stock for double row cylindrical roller bearings, support fast bulk order delivery.
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