INANKX45Combined Needle Roller and Axial Ball Bearing – 45 mm ID, 58 mm OD, 32 mm Height, Single-Direction Thrust, DIN 5429

Product Description

What this part is

INA NKX45 combined needle roller and axial ball bearing to DIN 5429. Bore Diameter: 45 mm. Outside Diameter: 58 mm. Overall Width: 32 mm. Rolling Elements: Needle Roller and Ball. Bore Type: Straight. Closure Type: Open. Dynamic Load Rating: 31,000 N radial, 28,000 N axial. Static Load Rating: 53,000 N radial, 69,000 N axial. Limiting Speed: 3,600 rpm. Item Weight: 0.247 kg (0.55 lb). Bearing Material: Chrome steel. Series: NKX. Base Number: NKX45. Unit Quantity: 1 Pc.

The needle roller row runs directly on a hardened, ground 45 mm shaft seat. Where the shaft is 40 mm, the matching inner ring is an INA IR40X45X20-XL.

Decoding the designation

NKX — a radial needle roller row and an axial ball row built into one unit, single-direction axial, to DIN 5429. The design is supplied for oil lubrication.

45 — bore code. Bore Diameter: 45 mm under the needle rollers.

A plain NKX carries no end cap. The NKX45-Z execution adds one.

Searchable forms of the designation: NKX45, NKX 45, NKX-45, NKX45-XL, NKX45XL.

What these specs mean in practice

Dynamic Load Rating: 31,000 N radial and 28,000 N axial. Static Load Rating: 53,000 N radial and 69,000 N axial. Fatigue load limits: 9,400 N radial and 3,400 N axial. Combining the two bearing types into one unit carries both load directions in a 13 mm radial section, which is why an NKX is specified where a separate radial and thrust pair would not fit.

Needle rollers running straight on the shaft remove the inner ring from the stack, so the whole radial section is available for rolling elements.

Limiting Speed: 3,600 rpm. Operating temperature range published by Schaeffler: −30 °C to +120 °C.

The axial row takes thrust in one direction. The axial bearing component measures 14 mm of the 32 mm overall height.

Mounting data

Bore Diameter: 45 mm, straight, on a hardened and ground shaft seat. Outside Diameter: 58 mm to the housing bore. Overall height C 32 mm. Width of the axial bearing component C1 14 mm. Shaft washer bore diameter dw 45 mm. Shaft shoulder mounting dimension da 60.5 mm. Maximum flange outside diameters D1 and D2 65.2 mm. Distance to the lubrication holes C1 9 mm and C2 9 mm. Maximum recess radius ra 0.6 mm. Minimum chamfer dimension r 0.6 mm. Matching inner ring for a 40 mm shaft: INA IR40X45X20-XL.

Quantity and configuration

Unit Quantity: 1 Pc. One complete combined unit: the radial needle roller assembly with its outer ring, plus the axial ball row with its washers.

Interchange guidance

Cross-Reference 1: INA NKX45-XL. Cross-Reference 2: IKO NAX4532. Cross-Reference 3: NTN NKX45.

All three share the 45 x 58 x 32 mm envelope and the combined radial needle plus single-direction axial ball design to DIN 5429. The NKX range is built by a short list of makers, so a nine-way interchange does not exist for this type; the references above are the genuine ones.