6203Z bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 6203Z. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
On this page6 sections ⌄
Find by measured dimensions
Enter bore d, outside diameter D and width B. Use decimals or inch fractions such as 1/2 or 1 1/4.
6203Z — source-labelled NSK dimensions
Nominal dimensions from the NSK Bearing Replacement Guide, reference BRG/C/E/11.15. This is a historical catalogue reference, checked 2026-10-03; it is not a current product-availability list or an interchange approval. Each row preserves its complete printed designation.
| Complete NSK designation | Bore d | Outside D | Width B | Source page / boundary |
|---|---|---|---|---|
| NSK catalogue record6203Z | 17 mm | 40 mm | 12 mm | Printed p. 34Nominal envelope only; complete execution as marked |
Read d×D×B together. Equal outside dimensions do not prove equal seals, internal clearance, precision, load ratings, lubricant or speed limits. Those properties are not supplied by this dimensional table. A DU, DDU, Z, ZZ, VV, DD or other marking is kept as printed; missing suffix records are not created from a base model.
6203Z dimensions and recorded technical data
The recorded 6203Z base designation measures 17×40×12 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from SKF, NTN. It does not assign the same dimensions or operating ratings to every suffix.
The numeric series boundary is preserved: a longer number is not included merely because its first digits match. 17 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 6203Z
Boundary size alone does not describe every ring, shoulder or assembled unit. These tables retain the recorded manufacturer labels, symbols, units and limits for each complete marking. Expand a record to check its detailed measurements.
Important: an approximate value, a minimum or a maximum keeps that qualifier. These reference extracts are not CAD drawings, fit recommendations or replacement approvals.
SKF 6203-Z/C3 — 3 dimension fields
Deep groove ball bearing with seals or shields. Source: SKF product catalogue; recorded snapshot 2026-09-02.
The source gives named dimensions but no drawing symbol for some values. An unqualified width is not relabelled as inner-ring B or assembly T.
Use the complete designation shown here. A seal, cage, clearance or precision suffix can matter even when nominal boundary dimensions match.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | Not supplied separately | 17.0 mm |
| Outside diameter | Not supplied separately | 40.0 mm |
| Width | Not supplied separately | 12.0 mm |
SKF 6203-Z — 13 dimension fields
Deep groove ball bearing with seals or shields. Source: SKF product catalogue; recorded snapshot 2026-09-02.
Use the complete designation shown here. A seal, cage, clearance or precision suffix can matter even when nominal boundary dimensions match.
Minimum and maximum mounting dimensions are limits, not nominal bearing dimensions. Check shaft/housing shoulders and fillets against the current drawing before designing a seat.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d | 17 mm |
| Deviation limits of mid-range bore diameter | t Δdmp | -0.007 to 0 mm |
| Outside diameter | D | 40 mm |
| Deviation limits of mid-range outside diameter | t ΔDmp | -0.009 to 0 mm |
| Width | B | 12 mm |
| Deviation limits of ring width | t ΔBs | -0.06 to 0 mm |
| Shoulder diameter | d 1 | ≈ 24.5 mm |
| Recess diameter | D 2 | ≈ 34.98 mm |
| Chamfer dimension | r 1,2 | min. 0.6 mm |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Diameter of shaft abutment | d a | min. 21.2 mm |
| Diameter of shaft abutment | d a | max. 24.4 mm |
| Diameter of housing abutment | D a | max. 35.8 mm |
| Radius of shaft or housing fillet | r a | max. 0.6 mm |
TIMKEN 6203-Z — 4 dimension fields
Deep groove ball bearing. Source: Timken official dimensional catalogue; recorded snapshot 2026-10-01.
Metric and inch measurements below are the values published together in this dated manufacturer record. Their displayed rounding is retained; the inch column does not turn a metric design into an inch-series design.
Keep the full marking shown for this record. Equal nominal dimensions do not establish matching closure, clearance, precision, material or operating limits.
Shaft and housing backing-shoulder dimensions, maximum fillet radii and signed offsets answer different installation questions. Preserve the named face, limit and sign; they are not additional bearing outside diameters or nominal widths.
This factual extract is a dimensional reference, not an OEM fitment statement, a replacement approval or a downloadable CAD model.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore (d) | d | 17 mm |
| O.D. (D) | D | 40 mm / 1.575 in |
| Width (B) | B | 12 mm / 0.472 in |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Max Shaft Fillet Radius | Not supplied separately | 0.6 mm / 0.024 in |
TIMKEN 6203-Z-C3 — 4 dimension fields
Deep groove ball bearing. Source: Timken official dimensional catalogue; recorded snapshot 2026-10-01.
Metric and inch measurements below are the values published together in this dated manufacturer record. Their displayed rounding is retained; the inch column does not turn a metric design into an inch-series design.
Keep the full marking shown for this record. Equal nominal dimensions do not establish matching closure, clearance, precision, material or operating limits.
Shaft and housing backing-shoulder dimensions, maximum fillet radii and signed offsets answer different installation questions. Preserve the named face, limit and sign; they are not additional bearing outside diameters or nominal widths.
This factual extract is a dimensional reference, not an OEM fitment statement, a replacement approval or a downloadable CAD model.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore (d) | d | 17 mm |
| O.D. (D) | D | 40 mm / 1.575 in |
| Width (B) | B | 12 mm / 0.472 in |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Max Shaft Fillet Radius | Not supplied separately | 0.6 mm / 0.024 in |
Catalogue parameters for 6203Z
Choose the complete brand and marking before reading a value. These source-labelled records add dimensions, construction and engineering properties where they were recorded; a shared model number does not establish interchangeability.
Units, ranges and minimum/maximum qualifiers are retained. The data is a dated catalogue reference, not a certified drawing, a complete current specification or an operating approval.
SKF 6203-Z — 51 recorded parameters
Deep groove ball bearing with seals or shields
Reference: SKF product catalogue; source snapshot 2026-09-02.
Read the complete suffix and recorded construction. Similar dimensions do not prove identical seals, clearance, precision or material.
Values shown are retained from the recorded source. Zero boundary dimensions and zero load ratings from incomplete legacy feeds are withheld rather than presented as usable specifications.
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | Not separately recorded | 17.0 mm |
| Outside diameter | Not separately recorded | 40.0 mm |
| Width | Not separately recorded | 12.0 mm |
Performance
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Basic dynamic load rating | Not separately recorded | 9.95 kN |
| Basic static load rating | Not separately recorded | 4.75 kN |
| Reference speed | Not separately recorded | 38000.0 r/min |
| Limiting speed | Not separately recorded | 24000.0 r/min |
| SKF performance class | Not separately recorded | SKF Explorer |
Properties
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Filling slots | Not separately recorded | Without |
| Number of rows | Not separately recorded | 1 |
| Locating feature, bearing outer ring | Not separately recorded | Without |
| Bore type | Not separately recorded | Cylindrical |
| Cage | Not separately recorded | Sheet metal |
| Matched arrangement | Not separately recorded | No |
| Radial internal clearance | Not separately recorded | CN |
| Material, bearing | Not separately recorded | Bearing steel |
| Coating | Not separately recorded | Without |
| Sealing | Not separately recorded | Shield on one side |
| Sealing type | Not separately recorded | Non-contact |
| Relubrication feature | Not separately recorded | Without |
| Indicative carbon footprint for new product | Not separately recorded | 0.24 kg CO 2 e |
Logistics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Product net weight | Not separately recorded | 0.0634 kg |
Engineering — Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d | 17 mm |
| Deviation limits of mid-range bore diameter | t Δdmp | -0.007 to 0 mm |
| Outside diameter | D | 40 mm |
| Deviation limits of mid-range outside diameter | t ΔDmp | -0.009 to 0 mm |
| Width | B | 12 mm |
| Deviation limits of ring width | t ΔBs | -0.06 to 0 mm |
| Shoulder diameter | d 1 | ≈ 24.5 mm |
| Recess diameter | D 2 | ≈ 34.98 mm |
| Chamfer dimension | r 1,2 | min. 0.6 mm |
| ISO tolerance class for dimensions | Not separately recorded | P6 and tighter width tolerance |
Engineering — Abutment dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Diameter of shaft abutment | d a | min. 21.2 mm |
| Diameter of shaft abutment | d a | max. 24.4 mm |
| Diameter of housing abutment | D a | max. 35.8 mm |
| Radius of shaft or housing fillet | r a | max. 0.6 mm |
Engineering — Calculation data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| SKF performance class | Not separately recorded | SKF Explorer |
| Basic dynamic load rating | C | 9.95 kN |
| Basic static load rating | C 0 | 4.75 kN |
| Fatigue load limit | P u | 0.2 kN |
| Reference speed | Not separately recorded | 38000 r/min |
| Limiting speed | Not separately recorded | 24000 r/min |
| Minimum load factor | k r | 0.03 |
| Calculation factor | f 0 | 13 |
Engineering — Tolerances of run-out
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Range of section height at inner ring of assembled bearing | t Kia | 4 µm |
| Maximum run-out of inner ring side face to the bore | t Sd | 7 µm |
| Maximum axial run-out of inner ring of assembled bearing | t Sia | 7 µm |
| Range of section height at outer ring of assembled bearing | t Kea | 7 µm |
| Perpendicularity of outer ring outside surface | t SD | 4 µm |
| Maximum axial run-out of outer ring of assembled bearing | t Sea | 8 µm |
| ISO tolerance class for geometrical tolerances | Not separately recorded | P5 |
No recorded variant matches these filters. Clear a filter to see other records; no substitute has been inferred.
| Brand / full designation | Named dimensions (mm / in) | Dynamic C (kN) | Static C0 (kN) | Reference speed (rpm) | Limiting speed (rpm) | Mass (kg / g) |
|---|---|---|---|---|---|---|
| SKF6203-ZDeep groove ball bearing with seals or shields |
| 9.95 kN | 4.75 kN | 38000 rpm | 24000 rpm | 0.0634 kg63.4 g |
| TIMKEN6203-ZDeep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| NTN6203ZDeep groove ball bearing |
| 10.6 kN | 4.6 kN | — | — | 0.066 kg66 g |
| SKF6203-Z/C3Deep groove ball bearing with seals or shields |
| 9.95 kN | 4.75 kN | 38000 rpm | 24000 rpm | 0.0661 kg66.1 g |
| SKF6203 ZJEMDeep groove ball bearing |
| 9.95 kN | 4.75 kN | 38000 rpm | 24000 rpm | 0.0634 kg63.4 g |
| SKF6203-ZNRDeep groove ball bearing with snap ring and integral sealing |
| 9.95 kN | 4.75 kN | 38000 rpm | 24000 rpm | 0.0656 kg65.6 g |
| TIMKEN6203-Z-C3Deep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| TIMKEN6203-Z-NRDeep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| TIMKEN6203-Z-NR-C3Deep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| TIMKEN6203-ZZDeep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| TIMKEN6203-ZZ-C2Deep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| TIMKEN6203-ZZ-C3Deep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| TIMKEN6203-ZZ-NRDeep groove ball bearing |
| 9.57 kN | 4.79 kN | — | — | 0.07 kg70 g |
| NSK6203ZZDeep groove ball bearing |
| 10.5 kN | 4.8 kN | — | — | — |
| KOYO6203 ZZDeep groove ball bearing |
| 12 kN | 4.8 kN | — | 17000 rpmLimiting Speeds(Grease Lub.): 17000 min-1 | 0.065 kg65 g |
| NACHI6203ZEDeep groove ball bearing |
| 12.1 kN | 4.8 kN | — | — | — |
| NACHI6203ZZEDeep groove ball bearing |
| 12.1 kN | 4.8 kN | — | — | — |
Compare recorded seals, clearance, precision and materials
Manufacturer wording is retained. A missing property is not inferred from another brand or a similar suffix.
| Brand / designation | Closure | Original precision | Clearance | Cage | Material | Lubricant |
|---|---|---|---|---|---|---|
| SKF 6203-Z | Shield on one side | P6 and tighter width tolerance | CN | Sheet metal | Bearing steel | None |
| TIMKEN 6203-Z | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| NTN 6203Z | shield on one side | Not recorded | CN | pressed steel cage | Not recorded | Not recorded |
| SKF 6203-Z/C3 | Shield on one side | Not recorded | C3 | Sheet metal | Bearing steel | None |
| SKF 6203 ZJEM | Shield on one side | Not recorded | C3 | Sheet metal | Bearing steel | None |
| SKF 6203-ZNR | Shield on one side | P6 and tighter width tolerance | CN | Sheet metal | Bearing steel | None |
| TIMKEN 6203-Z-C3 | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 6203-Z-NR | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 6203-Z-NR-C3 | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 6203-ZZ | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 6203-ZZ-C2 | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 6203-ZZ-C3 | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 6203-ZZ-NR | Shielded | Not recorded | Not recorded | Steel cage | Not recorded | Not recorded |
| NSK 6203ZZ | Metal shields on both sides | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 6203 ZZ | Shielded ZZ | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| NACHI 6203ZE | One shield | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| NACHI 6203ZZE | Two shields | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
How to compare these values
- Use the displayed dimension names and original symbols. Housing length L, height H2 and flange width are not bearing outside diameter D. A catalogue width with an unverified symbol must not be assumed to be inner-ring width B or assembly width T. Open the product record for mounting dimensions and geometry.
- Inch values are calculated from the recorded millimetres using 25.4 mm per inch, rounded to six decimal places. They do not change a metric bearing into an inch-series bearing. Gram values are converted from the recorded mass in kilograms.
- C and C0 describe different rating conditions. They are not a single safe working-load limit and cannot replace an application load calculation.
- Reference and limiting speeds are separate catalogue values. The source grease/oil context is shown where recorded. Lubricant, seals, loads, fit, clearance and cooling affect the usable operating speed.
- A common base number does not prove equivalent seals, clearance, precision, material or interchangeability. Open the full designation for these fields.
Related prefix matches — other model numbers may appear
These discovery results can contain a longer number or a different component. They are not specifications for the requested exact model. Open the complete product to inspect its original geometry.
6203-Z
Deep groove ball bearing with seals or shields
View full technical record →TIMKEN6203-Z
Deep groove ball bearing
View full technical record →NTN6203Z
Deep groove ball bearing
View full technical record →SKF6203-Z/C3
Deep groove ball bearing with seals or shields
View full technical record →TIMKEN6203-Z-C3
Deep groove ball bearing
View full technical record →NACHI6203ZE
Deep groove ball bearing
View full technical record →SKF6203 ZJEM
Deep groove ball bearing
View full technical record →SKF6203-ZNR
Deep groove ball bearing with snap ring and integral sealing
View full technical record →TIMKEN6203-Z-NR
Deep groove ball bearing
View full technical record →TIMKEN6203-Z-NR-C3
Deep groove ball bearing
View full technical record →TIMKEN6203-ZZ
Deep groove ball bearing
View full technical record →KOYO6203 ZZ
Deep groove ball bearing
View full technical record →Check the drawing before substituting
Nominal dimensions are not shaft-fit tolerances. Different variants can add grooves, flanges, wider rings or assembly components. When the table has different dimensions, the complete designation—not the shared prefix—controls.
Reference basis & data limits
Manufacturer terminology is retained in the product records. Technical reference basis: JTEKT Basic Bearing Knowledge (boundary dimensions, tolerance classes and lubrication); NSK Bearing ABCs (lubrication, designations and clearance); NTN technical FAQs (closure codes and component interchange); SKF rolling-bearing selection and maintenance references.
Selection workflows and catalogue grouping are BearingScope editorial aids. Verify the current drawing and application requirements before using a candidate. Missing database information is not converted into an assumed match.