IKO NATB5903 Needle Roller and Three-Point Contact Ball Bearing, 17 x 30 x 18 mm
Available
IKO NATB59 combined needle roller bearings pair a caged needle roller bearing with a three-point contact ball bearing. The needle rollers carry radial load and the ball bearing carries axial load in both directions, in a compact unit. This page lists 11 sizes: 15 to 60 mm bore, 28 to 85 mm outside diameter.
Combined type bearings are compact and economical, can take radial and axial loads at the same time, and are widely used in machine tools, textile machinery and industrial machinery. The bearing has an inner ring.
For axial load in one direction only, see the NATA type with an angular contact ball bearing.
Where this product is used
- Machine tools and industrial machinery
- Shafts that see radial load and axial load in both directions at the same time
- Compact combined radial and thrust supports
Features
- Combined needle roller and three-point contact ball bearing, radial and two-direction axial load (NATB59 series), 11 sizes
- Bore 15 to 60 mm, outside diameter 28 to 85 mm
- Needle roller bearing and three-point contact ball bearing in one unit, taking radial and axial load together
- Axial load in both directions (three-point contact ball bearing)
- Basic dynamic load ratings radial 7.71 to 41.8 kN, static 10.2 to 82.2 kN
- Allowable rotational speed 6,000 to 20,000 rpm (oil lubrication)
Key specifications
| Specification | Detail |
|---|---|
| Brand | IKO (Nippon Thompson Co., Ltd., Japan) |
| Type | Combined needle roller and three-point contact ball bearing, radial and two-direction axial load (NATB59 series) |
| Series | NATB59 |
| Models | NATB5902 to NATB5912 (11 sizes) |
| Bore diameter d | 15 to 60 mm |
| Outside diameter D | 28 to 85 mm |
| Width C | 18 to 34 mm |
| Oil hole | One in the outer ring, with an oil groove |
| Grease | Not prepacked: lubricate before use |
| Basic dynamic load rating C, radial | 7.71 to 41.8 kN |
| Basic dynamic load rating C, axial | 1.9 to 10.7 kN |
| Basic static load rating C0, radial | 10.2 to 82.2 kN |
| Basic static load rating C0, axial | 2.92 to 26.7 kN |
| Allowable rotational speed | 6,000 to 20,000 rpm (oil lubrication; up to 60% of this for grease lubrication) |
Available sizes
| Model | d (mm) | D (mm) | C (mm) | B (mm) | C radial (kN) | C axial (kN) | C0 radial (kN) | C0 axial (kN) | Speed (rpm) |
|---|---|---|---|---|---|---|---|---|---|
| NATB5902 | 15 | 28 | 18 | 20 | 7.71 | 1.9 | 10.2 | 2.92 | 20,000 |
| NATB5903 | 17 | 30 | 18 | 20 | 8.22 | 2.05 | 11.5 | 3.34 | 18,000 |
| NATB5904 | 20 | 37 | 23 | 25 | 14.3 | 3.81 | 18.4 | 6.11 | 16,000 |
| NATB5905 | 25 | 42 | 23 | 25 | 15.8 | 4.3 | 22.1 | 7.52 | 13,000 |
| NATB5906 | 30 | 47 | 23 | 25 | 17.7 | 4.55 | 26.8 | 8.46 | 11,000 |
| NATB5907 | 35 | 55 | 27 | 30 | 24 | 4.89 | 42.1 | 9.87 | 9,500 |
| NATB5908 | 40 | 62 | 30 | 34 | 30.6 | 5.35 | 60.4 | 11.8 | 8,500 |
| NATB5909 | 45 | 68 | 30 | 34 | 32.6 | 5.45 | 68.5 | 12.7 | 7,000 |
| NATB5910 | 50 | 72 | 30 | 34 | 33.6 | 5.66 | 72.5 | 13.6 | 7,000 |
| NATB5911 | 55 | 80 | 34 | 38 | 39.5 | 10.4 | 74.4 | 24.7 | 6,500 |
| NATB5912 | 60 | 85 | 34 | 38 | 41.8 | 10.7 | 82.2 | 26.7 | 6,000 |
C and C0 are the basic dynamic and static load ratings in the radial and axial directions. Width C is given for both types, and B (inner ring width) for NATB.
Selecting the right option
Choose the size with the Inside Diameter (mm) option, which is the bore of the bearing.
NATB takes axial load in both directions. Choose NATA if axial load acts in one direction only.
Fitting and use
These bearings are not prepacked with grease, so lubricate them before use. The outer ring has an oil groove and an oil hole. The allowable rotational speed in the tables is for oil lubrication; for grease lubrication use up to 60% of it.
Use a shaft tolerance of k5 and a housing bore tolerance of M6. Set the axial clearance to 0.1 to 0.3 mm and tighten the split inner ring firmly in the axial direction.
Related products
Parts that go with this range: NATA: axial load in one direction.
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IKO NATB59 Needle Roller Bearings with Three-Point Contact Ball Bearing, 15 to 60 mm Bore (Metric): 17
SKU: A0154337 | Model: NATB5903/IKO
IKO NATB5903 combined needle roller and three-point contact ball bearing, 17 x 30 x 18 mm, C 8.22 kN.
