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6803 bearing dimensions & suffix variants

Look up recorded dimensions for designations beginning with 6803. 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.

For tapered assemblies use total width T; for units or flanged bearings also check the mounting drawing.

Exact model evidence

6803 dimensions and recorded technical data

The recorded 6803 base designation measures 17×26×5 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from NSK, KOYO, NACHI, NTN, EZO. 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. 18 recorded variants are listed. A dash means the value is missing, not zero.

Brand / full designationNamed dimensions (mm / in)Dynamic C (kN)Static C0 (kN)Reference speed (rpm)Limiting speed (rpm)Mass (kg / g)
NSK6803Deep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
2.89 kN1.57 kN——0.007 kg7 g
KOYO6803Deep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Width (B)
5 mm
0.19685 in
3.3 kN1.55 kN—26000 rpmLimiting Speeds(Grease Lub.): 26000 min-1Limiting Speeds(Oil Lub.): 30000 min-10.008 kg8 g
NACHI6803Deep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN——0.008 kg8 g
NTN6803Deep groove ball bearing
Internal diameter (d)
17 mm
0.669291 in
External diameter (D)
26 mm
1.023622 in
Bearing/Inner ring width (B)
5 mm
0.19685 in
2.47 kN1.46 kN——0.008 kg8 g
EZO6803Deep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outer diameter (D)
26 mm
1.023622 in
Inner ring width (B)
5 mm
0.19685 in
2.23 kN1.46 kN——0.0071 kg7.1 g
NSK6803DDDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
2.89 kN1.57 kN———
NSK6803VVDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
2.89 kN1.57 kN———
NSK6803ZZDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
2.89 kN1.57 kN———
KOYO6803 2RSDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Width (B)
5 mm
0.19685 in
3.3 kN1.55 kN—14000 rpmLimiting Speeds(Grease Lub.): 14000 min-10.008 kg8 g
KOYO6803 2RUDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Width (B)
5 mm
0.19685 in
3.3 kN1.55 kN—26000 rpmLimiting Speeds(Grease Lub.): 26000 min-10.008 kg8 g
KOYO6803 ZZDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Width (B)
5 mm
0.19685 in
3.3 kN1.55 kN—26000 rpmLimiting Speeds(Grease Lub.): 26000 min-10.008 kg8 g
NACHI6803-2NKEDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN———
NACHI6803-2NSEDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN———
NACHI6803NKEDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN———
NACHI6803NSEDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN———
NACHI6803ZEDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN———
NACHI6803ZZEDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outside diameter (D)
26 mm
1.023622 in
Bearing width (B)
5 mm
0.19685 in
3.3 kN1.57 kN———
EZO6803 2RSDeep groove ball bearing
Bore diameter (d)
17 mm
0.669291 in
Outer diameter (D)
26 mm
1.023622 in
Inner ring width (B)
5 mm
0.19685 in
2.23 kN1.46 kN——0.00795 kg7.95 g
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 / designationClosureOriginal precisionClearanceCageMaterialLubricant
NSK 6803OpenNot recordedNot recordedNot recordedNot recordedNot recorded
KOYO 6803OpenNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803OpenNot recordedNot recordedNot recordedNot recordedNot recorded
NTN 6803openNot recordedCNpressed steel cageNot recordedNot recorded
EZO 6803Open (no closure suffix in this catalogue marking)Not recordedNot recordedNot recordedHigh-carbon chromium bearing steelNot recorded
NSK 6803DDContact-sealed DD catalogue typeNot recordedNot recordedNot recordedNot recordedNot recorded
NSK 6803VVNon-contact rubber seals on both sidesNot recordedNot recordedNot recordedNot recordedNot recorded
NSK 6803ZZMetal shields on both sidesNot recordedNot recordedNot recordedNot recordedNot recorded
KOYO 6803 2RSContact sealedNot recordedNot recordedNot recordedNot recordedNot recorded
KOYO 6803 2RUNon-contact sealedNot recordedNot recordedNot recordedNot recordedNot recorded
KOYO 6803 ZZShielded ZZNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803-2NKETwo non-contact sealsNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803-2NSETwo contact sealsNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803NKEOne non-contact sealNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803NSEOne contact sealNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803ZEOne shieldNot recordedNot recordedNot recordedNot recordedNot recorded
NACHI 6803ZZETwo shieldsNot recordedNot recordedNot recordedNot recordedNot recorded
EZO 6803 2RSTwo contact rubber sealsNot recordedNot recordedNot recordedHigh-carbon chromium bearing steelNot 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.

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.

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