6217-ZZ bearing: complete specifications & equivalents
The 6217-ZZ is a ISO 15 radial bearing sized 85 x 150 x 28 mm (bore x OD x width) with ZZ sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 85 mm |
| Outer diameter D | 150 mm |
| Width B | 28 mm |
| Material | GCr15 |
| Seal / shield | ZZ |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 87.1 kN |
| Basic static load rating C0 | 64 kN |
| Fatigue load limit Pu | 2.5 kN |
| Reference speed (thermal) | 9000 rpm |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 1900 g |
| Manufacturer designation | SKF 6217-2Z |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); 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 & 6200-series range
| Bore d | 3.346 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.102 in |
| ISO bore code | 17 |
| Radial section height (D−d)/2 | 32.5 mm |
| Smallest bore in 6200-series | 3 mm |
| Largest outer diameter in 6200-series | 540 mm |
| Width range across 6200-series | 2.5–85 mm |
| Bore position in 6200-series (smallest first) | 26 of 45 |
| Bore above smallest 6200-series size | 82 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6217 | ISO 15 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting. |
| 6217-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×150×28 mm envelope per ISO 15; seal variant differs (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6217-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×150×28 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 6217-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×150×28 mm envelope per ISO 15; seal variant differs (ZZ vs RSR) — confirm sealing suits the duty. |
| 6217-ZZ-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 6217-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×150×28 mm envelope per ISO 15; seal variant differs (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6217-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×150×28 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 6217-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 85×150×28 mm envelope per ISO 15; seal variant differs (ZZ vs RSR) — confirm sealing suits the duty. |
| 6217-ZZ-NTN | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 7217 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| NU217 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 6217-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6217 M (machined brass cage, open arrangement) is the same-size execution on the 85×150×28 mm envelope with ratings within 10 % — boundary dimensions interchangeable. |
| 217 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 217 shares the 85×150×28 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
| 217-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 217-2Z shares the 85×150×28 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
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 6217-ZZ model number is decoded
In the 6200-series (diameter series 2 of ISO 15) the last two digits encode the bore: 6217 carries bore code 17 = 85 mm. Outside diameter 150 mm and width 28 mm come from the ISO 15 boundary-dimensions general plan. Suffix -ZZ denotes two non-contact metallic shields; they retain grease and block coarse debris but are not liquid-tight. For normal-load mounting with a rotating inner ring on a 85 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. SKF's own suffix is 2Z (this page's industry-neutral spelling is -ZZ); catalogue number 6217-2Z.
Typical equipment & failure modes
Common applications
- large gearboxes
- industrial fans and blowers
- hoists and winches
- heavy conveyors
Known failure patterns
- fine-particle abrasion when non-contact shields let dust past in dirty duty
- grease aging in the shield-for-life cavity with no relubrication path
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- brinelling from static overload or hammering during mounting
Selection pitfalls — read before you substitute
- Large bores like the 85 mm of 6217-ZZ demand clean, burr-free seats; one raised burr under a ring this size cocks the bearing and concentrates load at the raceway edge, cutting life drastically.
- At 85 mm bore the 62xx light series is the workhorse section; its 150×28 mm envelope is what most motor and gearbox seats are machined for, so any alternative section must be checked against both this OD and this width, not the bore alone.
- ZZ shields are non-contact: 6217-ZZ blocks chips and coarse dust but is not waterproof — do not install it expecting a pressure-wash seal, step up to 6217-2RS for that.
- Shielded 6217-ZZ units are typically greased for life; prying the shields out for regreasing usually bends them and leaves a gap that throws grease in service.
- Do not quieten a noisy bearing by preloading it: the 6200-series is a deep-groove design, not angular-contact; axial preload raises temperature and shortens grease life.
- The housing bore for the 150 mm OD should be round within IT7; an oval bore pinches the outer ring of 6217-ZZ and shows up later as two-point loaded raceway wear.
- SKF spells the shielded version 6217-2Z (one shield: 6217-Z), not "-ZZ": the suffix language differs by brand even though the ISO envelope is identical, so quote the brand designation when ordering.
- The single-shield execution 6217-Z is a distinct order number in catalogue 17000: it suits open gears or oil-bath arrangements where the unshielded face faces the lubricant, and it is not interchangeable with the double-shield 6217-2Z for high-contamination positions.
- The 87.1/64 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 6217-ZZ bearing?
A 6217-ZZ deep-groove ball bearing has a 85 mm bore, 150 mm outer diameter and 28 mm width (3.346 × 5.906 × 1.102 in), per ISO 15 boundary dimensions. It is fitted with two non-contact metallic shields.
Are 6217 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6217 uses the same ISO 15 envelope (85×150×28 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting. Seal suffixes also differ by brand (2RS, DDU, LLU, 2RSL and similar).
What internal clearance does 6217-ZZ have?
Unless a clearance suffix says otherwise, 6217-ZZ is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 6217 and verify the residual clearance after mounting.
How should 6217-ZZ be mounted?
Apply the mounting force to the ring being fitted: on a 85 mm shaft seat the press load must pass through the inner-ring face only. Induction heating of the inner ring (max 120 °C) is the clean method at this size. Never strike the outer ring, the cage or the seals.
What is the SKF designation and catalogue data for 6217-ZZ?
In the SKF Rolling Bearings catalogue this size is listed as 6217-2Z — two non-contact sheet-metal shields, 85×150×28 mm per ISO 15. Quoted values: C 87.1 kN, C0 64 kN, Pu 2.5 kN, limiting speed 4500 r/min, mass 1900 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6217-ZZ.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.