INANX25ZXLNeedle Roller / Axial Ball Bearing – 25 mm Bore, 37 mm OD, 30 mm Height, End Cap, Grease Lubricated

Product Description

What this part is

INA NX25-Z-XL combined needle roller and axial ball bearing. A caged needle roller set takes the radial load and a ball thrust component takes load in one direction, in one unit. Bore Diameter: 25 mm. Outside Diameter: 37 mm. Overall Width: 30 mm. Dynamic Load Rating: 16,800 N radial. Static Load Rating: 22,400 N radial. Axial dynamic load rating: 11,100 N. Axial static load rating: 24,300 N. Limiting Speed: 4,900 rpm. Rolling Elements: Needle Roller and Ball. Bore Type: Straight. Closure Type: End cap. Lubricant: Grease. Item Weight: 0.111 kg (0.24 lb). Series: NX. Base Number: NX25.

Decoding the designation

N — needle roller bearing element, rollers running directly on the shaft.

X — axial ball bearing component combined with the radial needle roller assembly, acting in one direction.

25 — bore diameter in millimetres.

Z — end cap fitted. The cap closes the axial component and retains grease, which is what makes this the grease-lubricated execution.

XL — Schaeffler’s current-generation designation; NX25-Z-XL supersedes NX25-Z.

What these specs mean in practice

The NX family fits a thrust bearing inside the same outside diameter as the needle bearing, rather than beside it, so a shaft can be located axially without a second bearing seat. Radial capacity is 16,800 N dynamic in a 6 mm radial wall, and the ball component adds 11,100 N of one-direction thrust.

Limiting Speed: 4,900 rpm. Fatigue load limit: 4,200 N radial and 1,110 N axial.

Operating temperature range: −30 °C to 120 °C.

Mounting data

The needle rollers run on the shaft, which needs a ground raceway hardened to 670 HV or better. Schaeffler’s matching inner ring is the IR20X25X16-IS1-XL, converting the 25 mm bore to a 20 mm shaft seat.

Mounting dimension, shaft shoulder: 31.6 mm. Distance to lubrication hole: 8 mm. Maximum recess radius: 0.3 mm. Minimum chamfer dimension: 0.3 mm.

Housing retention: the matching snap rings are the WR37 and SW37. Connection diameter for the snap ring: 40.4 mm. Connection width with snap ring: 14.2 mm.

Quantity and configuration

Unit Quantity: 1 Pc. Single combination bearing assembly, straight bore, end cap fitted.

Interchange guidance

NX combination bearings are a Schaeffler design carried by only a short list of makers, so a broad nine-way interchange does not exist for this type. The genuine equivalent is the IKO NAX2530Z at the same 25 x 37 x 30 mm envelope. Designation variants: NX 25 Z, NX25Z, NX25-Z, NX25ZXL.