6230-ZZ bearing: complete specifications & equivalents
The 6230-ZZ is a ISO 15 radial bearing sized 150 x 270 x 45 mm (bore x OD x width) with ZZ sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NSK |
| Bore diameter d | 150 mm |
| Outer diameter D | 270 mm |
| Width B | 45 mm |
| Material | GCr15 |
| Seal / shield | ZZ |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 194 kN |
| Basic static load rating C0 | 168 kN |
| Mass | 10000 g |
| Manufacturer designation | NSK 6230ZZ |
| Standard | ISO 15 |
| Catalog version | NSK Rolling Bearings E1103 Part C |
| Last verified | 2026-09-24 |
Source: catalog reference (NSK Rolling Bearings E1103 Part C) · extracted 2026-09-24
Dimensions in inches & 6200-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 10.63 in |
| Width B | 1.772 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 60 mm |
| Smallest bore in 6200-series | 10 mm |
| Largest outer diameter in 6200-series | 440 mm |
| Width range across 6200-series | 9–72 mm |
| Bore position in 6200-series (smallest first) | 27 of 34 |
| Bore above smallest 6200-series size | 140 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6230 | ISO-INTERCHANGE | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 envelope interchange; NSK suffix ZZ maps to industry-neutral ZZ. Verify seal design, grease and speed rating per brand catalogue. |
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 6230-ZZ model number is decoded
In the 6200-series (ISO 15 diameter series 2) the last two digits encode the bore: 6230 carries bore code 30 = 150 mm. Outside diameter 270 mm and width 45 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 150 mm shaft, typical catalogue practice is a m6 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude.
Typical equipment & failure modes
Common applications
- industrial fans and blowers
- hoists and winches
- heavy conveyors
- pulp and paper machinery
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
- false brinelling from vibration while the shaft is stationary
- fretting corrosion on a loose shaft seat
Selection pitfalls — read before you substitute
- Mount this 150 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.
- The 62xx light series is the default general-purpose section at 150 mm bore; before upgrading to a 6330 for extra capacity, confirm the housing accepts a 270 mm OD and 45 mm width — it is not a drop-in swap.
- ZZ shields are non-contact: 6230-ZZ blocks chips and coarse dust but is not waterproof — do not install it expecting a pressure-wash seal, step up to 6230-2RS for that.
- Shielded 6230-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.
- NSK catalogues the shielded version as 6230ZZ — suffix ZZ, two non-contact steel shields; the industry-neutral page spelling is -ZZ. Quote the NSK designation when ordering.
- The 194/168 kN ratings, mass 10000 g here are NSK Rolling Bearings E1103 Part C catalogue figures for 6230ZZ; this seal/size combination has no counterpart in the SKF 17000 extract used elsewhere on this site, so the page rests on a single manufacturer source — internal geometry and ratings legitimately differ between brands, so re-verify before substituting in a rated drive.
Frequently asked questions
What are the dimensions of a 6230-ZZ bearing?
A 6230-ZZ deep-groove ball bearing has a 150 mm bore, 270 mm outer diameter and 45 mm width (5.906 × 10.63 × 1.772 in), per ISO 15 boundary dimensions. It is fitted with two non-contact metallic shields.
How does the 6230 bore code work?
The last two digits of 6230 are bore code 30, giving 30 × 5 = 150 mm bore. The 270 mm outside diameter and 45 mm width follow the ISO 15 diameter series, not the bore code alone.
What does the ZZ suffix on 6230-ZZ mean?
ZZ means two non-contact sheet-metal shields, one each side. They retain factory grease and block coarse particles with little friction, but do not seal against liquids, fine dust or pressure washing.
How does the 6200 compare with other series at the same 150 mm bore?
The '2' is the light diameter series: 270×45 mm with a 60.0 mm radial section at 150 mm bore. A 6330 on the same bore is larger and higher-rated; a 6030 is smaller and lower-rated.
What is the NSK designation and catalogue data for 6230-ZZ?
In the NSK Rolling Bearings catalogue (E1103 Part C) this size is listed as 6230ZZ — two non-contact steel shields (NSK suffix ZZ), 150×270×45 mm per ISO 15. Quoted values: C 194 kN, C0 168 kN, mass 10000 g. The industry-neutral page spelling 6230-ZZ follows the seal-suffix convention used across this site, not NSK order-number spelling. Reference and limiting speeds are not tabulated in the E1103 dimension tables used here; consult NSK speed tables before high-speed service.
Reviewed & verified by the MPN Base engineering desk against source catalog NSK Rolling Bearings E1103 Part C on 2026-09-24. Read our editorial & correction policy.