NACHI 6207-2NSE9 Sealed Deep Groove Ball Bearing 35x72x17 mm
Available
This NACHI range covers 2 single row deep groove ball bearings, contact sealed, from 35 to 45 mm bore (outer diameters 72 to 85 mm, widths 17 to 19 mm). Select the size from the drop-down: each size has its own bearing number, load ratings and limiting speed in the Model Details.
Deep groove bearings are the most widely used ball bearing type. They carry radial, axial and combined loads, run at high speed with high running accuracy, and need no adjustment. The 2 bearings with a 9 in the number (for example 6207-2NSE9) are NACHI QUEST bearings with heat-resistant nitrile seals and NACHI high-performance grease.
Where this product is used
- Electric motors and generators
- Pumps, fans and blowers
- Gearboxes and industrial transmissions
- Conveyor rollers, idlers and pulleys
- Power tools, appliances and general industrial machinery
Features
- Two contact rubber seals (2NSE9) retain the factory grease fill and give excellent dust and water proofing, including in severe dust environments
- Seal contact adds friction torque, so limiting speed is lower than the equivalent open or shielded bearing
- NACHI QUEST bearings (suffix 9): heat-resistant nitrile seals and NACHI high-performance grease, with two times the grease life of NACHI’s conventional grease at 120 °C
- Load ratings, limiting speeds and mass for every size are taken from the manufacturer’s catalogue; boundary dimensions follow the ISO/JIS standard plan
Key specifications
| Specification | Detail |
|---|---|
| Type | Single row deep groove ball bearing |
| Bearing numbers | 2, series 6200 |
| Bore d | 35 to 45 mm |
| Outer diameter D | 72 to 85 mm |
| Width B | 17 to 19 mm |
| Seals / shields | Contact sealed 2NSE9 (2) |
| Radial internal clearance | Normal and C3 (see Model Details) |
| Basic dynamic load rating Cr | 25.7 to 32.5 kN |
| Basic static load rating Cor | 15.3 to 20.5 kN |
Available sizes
| Model | Size d x D x B (mm) | Cr (kN) | Cor (kN) | Limiting speed, grease (rpm) |
|---|---|---|---|---|
| 6207-2NSE9 | 35 x 72 x 17 | 25.7 | 15.3 | 6,300 |
| 6209-2NSE9 | 45 x 85 x 19 | 32.5 | 20.5 | 5,300 |
Selecting the right option
Contact-sealed bearings (NSE, NSL, NS) give the best dust and water proofing of the three closure types and can run in severe dust. The trade-off is higher friction torque and a lower limiting speed. The filled grease can leak at high speed or high temperature, or if the outer ring rotates. For standard filled grease the recommended temperature range is -25 to 100 °C.
Fitting and use
Check the load and speed against the catalogue figures in the table before ordering, and apply a suitable safety factor. These bearings must always carry a minimum radial load so the balls roll rather than slide, and heavy axial loads should be checked with AIMS before ordering.
Press the ring that is being fitted, not the other ring or the balls: force goes through the side face of the inner ring on a shaft and the outer ring in a housing.
Sealed bearings are built for inner ring rotation, so they are not suited to high speed outer ring rotation. Do not wash or heat sealed bearings before mounting.
Related products
The same NACHI deep groove range is also available with other closures: NACHI open deep groove ball bearings (31 sizes) and NACHI double shielded deep groove ball bearings (60 sizes).
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35 x 72 x 17mm bearing
Model Number: 6207-2NSE9/NACHI
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45 x 85 x 19mm bearing
Model Number: 6209-2NSE9/NACHI
