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Gearmotors: What They Are and How to Size a Replacement
Many industrial loads need torque an electric motor can’t deliver on its own, at a
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INA RNA4928 machined-ring needle roller bearing, 160 x 190 x 50 mm, single row caged, without inner ring, dimension series 49, open, one piece.
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| MFR / Brand | INA |
|---|---|
| MPN | RNA4928 |
| Model | RNA4928-XL |
| Bearing Type | Needle Roller Bearing, Open |
| ID | 160 mm |
| OD | 190 mm |
| Width | 50 mm |
| Material | Bearing Steel |
|---|---|
| Series | RNA49 |
| Lubricant | Grease |
| Base Number | RNA4928 |
| Industry Terms | Machined needle roller bearing, needle bearing without inner ring, caged needle roller, machined ring needle bearing, standard duty needle roller |
| Common Misspellings | INA RNA 4928, RNA4928 INA, RNA4982, RN4928, RNA 49-28 |
| Application Types | Gearboxes, planetary carriers, heavy machine tool spindles, press and rolling mill linkages, mechanical power transmission |
| Bore Shaft Size | 160 mm (6.2992 in) under-roller shaft raceway diameter |
| Mpn Variants | RNA4928, RNA 4928, RNA4928-XL, RNA 49 28, RNA49/28, RNA-4928 |
| Compatible With Replaces | INA NA4928 is the same bearing supplied with an inner ring |
| Additional Attributes | Outer ring and caged needle roller assembly; runs directly on the shaft raceway |
| Rolling Elements | Needle Roller |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.40.00 |
| Part Number | RNA4928-XL |
| Country Region Of Manufacture | Germany |
| Closure Type | Open |
| Cross Reference 1 | IKO RNA4928 |
|---|---|
| Cross Reference 2 | NTN RNA4928 |
| Cross Reference 3 | Koyo RNA4928 |
| Cross Reference 4 | INA NA4928 – includes inner ring, different bore |
INA RNA4928 single-row machined-ring needle roller bearing, 160 x 190 x 50 mm, dimension series 49, one piece. Outer ring and caged needle roller assembly without inner ring; the needle rollers run directly on the shaft raceway. Open.
RNA — machined needle roller bearing without inner ring, in the INA scheme.
49 — dimension series 49.
28 — size code, 160 mm raceway diameter.
-XL — X-life, the current INA production standard for this part.
Under-Roller (Shaft Raceway) Diameter: 160 mm (6.2992 in). Outside Diameter: 190 mm (7.4803 in). Width: 50 mm (1.9685 in). Number of Rows: 1. Rolling Elements: Needle Roller, caged. Closure Type: Open. Series: RNA49 (dimension series 49). Base Number: RNA4928. Unit Quantity: 1 Pc. Harmonization Code: 8482.40.00.
Under-roller (shaft raceway) diameter 160 mm, outside diameter 190 mm, width 50 mm. The 160 mm figure is the raceway diameter of the shaft, not an inner ring bore.
Cross-references: IKO RNA4928, NTN RNA4928 and Koyo RNA4928 (160 x 190 x 50 mm, without inner ring). INA NA4928 is the version with an inner ring. INA RNA4928UU is the sealed execution. Current INA production designation: RNA4928-XL.
Under-roller diameter 160 mm, outside diameter 190 mm, width 50 mm.
No. RNA is the needle roller bearing without inner ring; INA NA4928 is the version with an inner ring.
X-life, the current INA production standard for this part.
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