NJ1017-ML bearing: complete specifications & equivalents
The NJ1017-ML is a ISO 15 radial bearing sized 85 x 130 x 22 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 85 mm |
| Outer diameter D | 130 mm |
| Width B | 22 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 68.2 kN |
| Basic static load rating C0 | 86.5 kN |
| Fatigue load limit Pu | 10.8 kN |
| Reference speed (thermal) | 6000 rpm |
| Limiting speed (mechanical) | 9000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1100 g |
| Manufacturer designation | SKF NJ 1017 ML |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings); 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 & NJ1000-series range
| Bore d | 3.346 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 0.866 in |
| ISO bore code | 17 |
| Radial section height (D−d)/2 | 22.5 mm |
| Smallest bore in NJ1000-series | 45 mm |
| Largest outer diameter in NJ1000-series | 600 mm |
| Width range across NJ1000-series | 16–90 mm |
| Bore position in NJ1000-series (smallest first) | 4 of 15 |
| Bore above smallest NJ1000-series size | 40 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NU1017-ML | SKF | full Dimensions and internal design equivalent — standard interchange. | Same ISO 15 envelope 85×130×22 mm and equivalent catalogue ratings; the NU execution differs in flange/retaining-ring configuration — boundary-dimension interchangeable, but axial-locating behaviour is not identical. |
| NUP1017-ML | SKF | full Dimensions and internal design equivalent — standard interchange. | Same ISO 15 envelope 85×130×22 mm and equivalent catalogue ratings; the NUP execution differs in flange/retaining-ring configuration — boundary-dimension interchangeable, but axial-locating behaviour is not identical. |
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 NJ1017-ML model number is decoded
In SKF catalogue PUB BU/P1 17000, SKF NJ 1017 ML denotes a single-row caged cylindrical roller bearing on the ISO 15 85×130×22 mm envelope, dimension series 10 (extra-slim OD, normal width), with catalogue mass 1100 g. The NJ configuration means two integral flanges on the inner ring and no flanges on the outer ring; the inner ring retains the roller set; functionally the bearing is able to locate the shaft axially in one direction; an HJ angle ring on the opposite side converts it into two-direction location. The ML suffix marks the basic (non-E) execution with a machined brass cage, the standard choice for the larger and earlier-design sizes. With C 68.2 kN and C0 86.5 kN, size the bearing on the 85×130 mm ISO 15 envelope and check the 10.8 kN Pu against the equivalent-load floor; the catalogue lists 6,000 r/min thermal reference speed and 9,000 r/min mechanical limiting speed. Assembly note: orient the inner-ring flange side toward the axial load direction; if an HJ angle ring is used, verify its fit and clearance before locking the arrangement. Heat steel rings inductively to max 120 °C.
Typical equipment & failure modes
Common applications
- rolling-mill auxiliary drive shafts
- paper-machine press rolls
- cement-plant conveyor drives
- heavy gearbox and pinion shafts
Known failure patterns
- inner-ring raceway spalling from overload or contamination in the line-contact hertz zone
- outer-ring raceway fatigue after extended service at loads above the catalogue L10 rating
- cage pocket wear from roller skew at light load
- cage pocket wear from roller skidding at insufficient radial load or during start-up before oil film build-up
- roller-end scoring from inadequate oil flow in the roller-raceway contact
- edge-loading fatigue after shaft deflection beyond the 3–4 minute alignment limit
- edge loading from shaft deflection beyond the bearing alignment limit (≈ 3-4 minutes of arc for single-row CRB)
Selection pitfalls — read before you substitute
- Do not use a NJ bearing where two-direction axial location is required without an HJ angle ring
- The dimension series 10 (extra-slim OD, normal width) envelope is shared with the N/NU/NJ/NUP executions of 1017, but flange configuration and axial-locating behaviour differ — quote the full SKF NJ 1017 ML and do not substitute rib styles without checking the shaft locating scheme.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 130 mm raceway.
- Catalogue reference and limiting speeds are different criteria: observe the mechanical ceiling even when thermal calculations allow more.
- The 68.2/86.5 kN ratings are SKF catalogue 17000 (2018) values for the ML execution; re-verify against the current catalogue for critical drives and keep the catalogue version with the specification.
Frequently asked questions
What are the dimensions and catalogue data of NJ1017-ML?
SKF NJ 1017 ML is a single-row caged cylindrical roller bearing with 85 mm bore, 130 mm OD and 22 mm width per ISO 15. SKF lists C 68.2 kN, C0 86.5 kN, Pu 10.8 kN, reference speed 6,000 r/min and limiting speed 9,000 r/min, mass about 1100 g.
What does the NJ designation and ML suffix mean?
The ML suffix marks the basic (non-E) execution with a machined brass cage, the standard choice for the larger and earlier-design sizes. Structurally this execution has two integral flanges on the inner ring and no flanges on the outer ring; the inner ring retains the roller set.
Can NJ1017-ML take axial load and locate the shaft?
In one direction only, via the two inner-ring flanges. Add an HJ angle ring on the opposite side for two-direction location.
How does NJ1017-ML compare with the other executions in the same envelope?
The N/NU/NJ/NUP executions share the ISO 15 envelope and load ratings but differ in flange arrangement and axial-locating behaviour; quote the exact order number.
What limits the service life of this bearing most often?
Line-contact fatigue above the L10 rating, cage wear at light loads and high temperatures, and edge loading from misalignment beyond about 3–4 minutes of arc are the typical failure drivers.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings on 2026-09-26. Read our editorial & correction policy.