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605 bearing dimensions & suffix variants

Look up recorded dimensions for designations beginning with 605. 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.

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

Catalogue variant evidence

605 — published size and closure variants

605 is the base grouping for the specific records below. Read the complete designation and publisher on each row. The source unit is retained beside the converted unit. A shield or seal can change the width; equal bore and outside diameter do not establish the same envelope.

3 source-labelled records; 3 shown initially.

Publisher / full modelClosure / materiald×D×B in mmd×D×B in inchesSource unit
SMB605OpenChrome steel5×14×5 mm0.19685×0.551181×0.19685 inmm
SMB605ZZShieldedChrome steel5×14×5 mm0.19685×0.551181×0.19685 inmm
SMB605-2RSSealedChrome steel5×14×5 mm0.19685×0.551181×0.19685 inmm
Page 1

Keep RS, 2RS, ZZ and width suffixes distinct

The table records the publisher’s open, shielded or sealed column. An unlisted “RS” marking is not rewritten as “2RS”. Keep special endings such as W21, W23 or a fractional bore suffix: they can identify a different width or bore. No automatic cross-brand substitution is approved.

Metric values converted from printed inch decimals inherit the source rounding. For example, 0.2812 in converts to 7.14248 mm; that extra decimal detail is arithmetic, not a tolerance or a machining target. Never silently round an inch bearing into the nearest metric size. Missing speed, clearance, precision, internal ball diameter, material grade or exact lubricant remain unknown.

Publisher references: SMB product charts and Enduro 1600-series data; checked 2026-10-02. Original BearingScope interpretation. No stock, sales, vehicle fitment or redistributable CAD is implied. Material names describe the source page, not a certificate for every item sold under a similar number.

Exact model evidence

605 dimensions and recorded technical data

The recorded 605 base designation measures 5×14×5 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from NSK, KOYO, 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. 7 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)
NSK605Deep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outside diameter (D)
14 mm
0.551181 in
Bearing width (open) (B)
5 mm
0.19685 in
1.46 kN0.505 kN——0.00354 kg3.54 g
KOYO605Deep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outside diameter (D)
14 mm
0.551181 in
Width (B)
5 mm
0.19685 in
1.65 kN0.49 kN—50000 rpmLimiting Speeds(Grease Lub.): 50000 min-1Limiting Speeds(Oil Lub.): 60000 min-10.003 kg3 g
EZO605Deep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outer diameter (D)
14 mm
0.551181 in
Inner ring width (B)
5 mm
0.19685 in
1.33 kN0.507 kN——0.00309 kg3.09 g
NSK605DDDeep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outside diameter (D)
14 mm
0.551181 in
Catalogue width (symbol unverified)
5 mm
0.19685 in
1.46 kN0.505 kN———
NSK605ZZDeep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outside diameter (D)
14 mm
0.551181 in
Catalogue width (symbol unverified)
5 mm
0.19685 in
1.46 kN0.505 kN——0.00348 kg3.48 g
KOYO605 ZZDeep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outside diameter (D)
14 mm
0.551181 in
Width (B)
5 mm
0.19685 in
1.65 kN0.49 kN—50000 rpmLimiting Speeds(Grease Lub.): 50000 min-1Limiting Speeds(Oil Lub.): - min-10.003 kg3 g
EZO605 2RSDeep groove ball bearing
Bore diameter (d)
5 mm
0.19685 in
Outer diameter (D)
14 mm
0.551181 in
Inner ring width (B)
5 mm
0.19685 in
1.33 kN0.507 kN——0.00336 kg3.36 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 605OpenNot recordedNot recordedNot recordedNot recordedNot recorded
KOYO 605OpenNot recordedNot recordedNot recordedNot recordedNot recorded
EZO 605Open (no closure suffix in this catalogue marking)Not recordedNot recordedNot recordedHigh-carbon chromium bearing steelNot recorded
NSK 605DDContact rubber seals on both sides (DD)Not recordedNot recordedNot recordedNot recordedNot recorded
NSK 605ZZMetal shields on both sides (ZZ)Not recordedNot recordedNot recordedNot recordedNot recorded
KOYO 605 ZZShielded ZZNot recordedNot recordedNot recordedNot recordedNot recorded
EZO 605 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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