6203ZZ bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 6203ZZ. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
On this page5 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.
6203ZZ dimensions and recorded technical data
The recorded 6203ZZ base designation measures 17×40×12 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from NSK, KOYO. 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. 7 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 6203ZZ
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.
KOYO 6203 ZZ — 3 dimension fields
Deep groove ball bearing. Source: JTEKT / Koyo 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.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d | 17 mm |
| Outside diameter | D | 40 mm |
| Width | B | 12 mm |
TIMKEN 6203-ZZ-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 |
TIMKEN 6203-ZZ — 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 6203ZZ
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.
KOYO 6203 ZZ — 14 recorded parameters
Deep groove ball bearing
Reference: JTEKT / Koyo 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.
Technical Data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| d | Not separately recorded | 17 mm |
| D | Not separately recorded | 40 mm |
| B | Not separately recorded | 12 mm |
| R(Min.) | Not separately recorded | 0.6 mm |
| Basic Load Ratings : Cr | Not separately recorded | 12.0 kN |
| Basic Load Ratings : C0R | Not separately recorded | 4.80 kN |
| Fatigue Load Limit : Cu | Not separately recorded | 0.370 kN |
| Factor : F0 | Not separately recorded | 13.2 |
| Limiting Speeds(Grease Lub.) | Not separately recorded | 17000 min-1 |
| Da(Min.) | Not separately recorded | 21 mm |
| Da(Max.) | Not separately recorded | 22 mm |
| Da(Max.) | Not separately recorded | 36 mm |
| Ra(Max.) | Not separately recorded | 0.6 mm |
| Mass(Refer.) | Not separately recorded | 0.065 kg |
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) |
|---|---|---|---|---|---|---|
| TIMKEN6203-ZZDeep 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 |
| 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 |
| 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 |
|---|---|---|---|---|---|---|
| TIMKEN 6203-ZZ | 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 |
| 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 |
| 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-ZZ
Deep groove ball bearing
View full technical record →KOYO6203 ZZ
Deep groove ball bearing
View full technical record →NSK6203ZZ
Deep groove ball bearing
View full technical record →TIMKEN6203-ZZ-C2
Deep groove ball bearing
View full technical record →TIMKEN6203-ZZ-C3
Deep groove ball bearing
View full technical record →NACHI6203ZZE
Deep groove ball bearing
View full technical record →TIMKEN6203-ZZ-NR
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.