NX35-Z bearing: complete specifications & equivalents
The NX35-Z is a DIN 616 radial bearing sized 35 x 47 x 30 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 35 mm |
| Outer diameter D | 47 mm |
| Width B | 30 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 24.6 kN |
| Basic static load rating C0 | 45 kN |
| Fatigue load limit Pu | 5.6 kN |
| Reference speed (thermal) | 5000 rpm |
| Limiting speed (mechanical) | 3400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 160 g |
| Manufacturer designation | NX 35 Z |
| Standard | DIN 616 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.8 needle roller / thrust ball, full complement thrust part |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.8 needle roller / thrust ball, full complement thrust part) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.8 needle roller / thrust ball, full complement thrust part); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & NX-series range
| Bore d | 1.378 in |
|---|---|
| Outer diameter D | 1.85 in |
| Width B | 1.181 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 6 mm |
| Smallest bore in NX-series | 7 mm |
| Largest outer diameter in NX-series | 47 mm |
| Width range across NX-series | 18–30 mm |
| Bore position in NX-series (smallest first) | 9 of 9 |
| Bore above smallest NX-series size | 28 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NX35 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 35×47×30 mm envelope and equivalent catalogue ratings; NX35 is the combined needle/thrust ball execution — boundary-dimension interchangeable, execution differences (seals, shields, cage) apply. |
| RNA6906 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×47×30 mm envelope, but catalogue C/C0 differ between the executions (24.6/45 vs 42.9/75 kN) — boundary dimensions match, not a load-rating equivalent. |
| NKX35-Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (35×47×30 mm) combined needle/thrust ball execution with ratings within 10 % — substitution possible after checking ring/flange construction. |
| NKX35 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (35×47×30 mm) combined needle/thrust ball execution with ratings within 10 % — substitution possible after checking ring/flange construction. |
| NKXR35 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (35×47×30 mm) combined needle/thrust needle execution with ratings within 10 % — substitution possible after checking ring/flange construction. |
| NKXR35-Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (35×47×30 mm) combined needle/thrust needle execution with ratings within 10 % — substitution possible after checking ring/flange construction. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the NX35-Z model number is decoded
The combined needle roller / full complement thrust ball bearings execution NX 35 Z measures 35×47×30 mm: radial duty on caged needle rollers, axial duty on a full complement of thrust balls rated 13.5 kN (Ca), both in one shaft position. Reading the designation: NX marks needle roller + full complement thrust ball, the number the 35 mm shaft seat; 47 mm OD and 30 mm overall height follow the series plan. Full complement thrust parts run slower than caged ones: observe the 3,400 r/min limiting speed, and expect the thrust part to govern the thermal ceiling. Selection arithmetic for the combined unit: radial C 24.6 kN, radial C0 45 kN, axial dynamic 13.5 kN (Ca) and axial static 38 kN (C0a); combine them with the equivalent-load factors from the catalogue before checking L10. Check after fitting that the radial needle cage and the thrust part rotate independently where the design allows; binding between the two indicates a bent washer or a stray ball.
Typical equipment & failure modes
Common applications
- screw jack and lifting screw spindles
- valve and dosing pump stems with slow axial push
- light rotary tables under axial load
- oscillating pivots with steady axial preload
Known failure patterns
- needle edge loading and raceway denting when the shaft deflects beyond the compensation range
- polymer cage deformation when the local temperature exceeds the 120 °C sustained limit
- grease starvation at the roller ends when relubrication intervals are stretched in dirty duty
- hard-particle indentation in unfiltered lubricant
- thrust washer raceway wear from reverse axial shocks the one-direction thrust part cannot carry
Selection pitfalls — read before you substitute
- At 35 mm bore, verify shaft deflection against the needle length: these rollers tolerate little edge loading, and a simply supported span between 35 mm seats can bend past the compensation range long before the load rating is exhausted.
- The quoted 24.6/45 kN ratings are SKF catalogue values for this exact execution (NX 35 Z); ratings can be revised without the order number changing, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the drawing.
- Oscillating pivots fail differently: rocking through a small angle concentrates wear in the same roller positions — inspect those zones, and consider rotating the assembly's clock position at service intervals.
- Height stack-up is easy to mis-check: the thrust-washer part adds height beyond a plain needle bearing, and clamping the stack solid over it preloads the thrust set beyond its rating.
- Do not treat the axial rating 13.5 kN (Ca) as independent of radial load: the combined equivalent load formulas couple them, and a unit sized on radial life alone will spall the ball raceway first under real thrust.
- The 24.6/45 kN ratings and 160 g mass are SKF catalogue values transcribed from ch. 7.8 of PUB BU/P1 17000 (PDF table page 656); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
What mounting mistakes ruin a NX 35 Z?
Press on the ring faces only with a fitting sleeve, keep everything square to the 35 mm seat, and never transmit force through the rolling elements. Follow the catalogue's seat tolerances — the narrow needle contact forgives neither tilt nor burrs.
Is the NX 35 Z sealed?
No — this execution is open and depends on the housing sealing arrangement; grease it at assembly and keep the relubrication interval short in dirty duty.
Which dimensions does the NX 35 Z have?
A NX 35 Z measures 35 mm bore/Fw × 47 mm outside diameter × 30 mm width (1.378 × 1.85 × 1.181 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 24.6 kN, static C0 45 kN, fatigue limit Pu 5.6 kN, limiting speed 3,400 r/min, reference speed 5,000 r/min, mass about 160 g. Axial ratings of the thrust part: dynamic Ca 13.5 kN (Ca), static C0a 38 kN (C0a), minimum load factor A 0.0075; the thrust set carries load in one direction only.
What does NX 35 Z mean in SKF part numbering?
NX = needle roller radial part + full complement thrust ball part for a 35 mm shaft; the catalogue plan completes 47 mm OD and 30 mm overall height. The packed thrust set maximises axial capacity at low speed.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.8 needle roller / thrust ball, full complement thrust part on 2026-09-26. Read our editorial & correction policy.