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686 bearing dimensions & suffix variants

Look up recorded dimensions for designations beginning with 686. 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

686 — published size and closure variants

686 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.

5 source-labelled records; 5 shown initially.

Publisher / full modelClosure / materiald×D×B in mmd×D×B in inchesSource unit
SMB686OpenChrome steel6×13×3.5 mm0.23622×0.511811×0.137795 inmm
SMB686ZZShieldedChrome steel6×13×5 mm0.23622×0.511811×0.19685 inmm
SMB686-2RSSealedChrome steel6×13×5 mm0.23622×0.511811×0.19685 inmm
SMB686ZZW45ShieldedChrome steel6×13×4.5 mm0.23622×0.511811×0.177165 inmm
SMB686-2RSW45SealedChrome steel6×13×4.5 mm0.23622×0.511811×0.177165 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.

Metric and inch variant directoryMain catalogue dimension finderExact unit conversionClosure-selection guide
Exact model evidence

686 dimensions and recorded technical data

The recorded 686 base designation measures 6×13×3.5 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from 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. 11 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)
KOYO686Deep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Width (B)
3.5 mm
0.137795 in
1.35 kN0.44 kN—48000 rpmLimiting Speeds(Grease Lub.): 48000 min-1Limiting Speeds(Oil Lub.): 57000 min-10.001 kg1 g
EZO686Deep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outer diameter (D)
13 mm
0.511811 in
Inner ring width (B)
3.5 mm
0.137795 in
1.08 kN0.438 kN——0.00185 kg1.85 g
FAG686-2RSR>NDeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Width (B)
5 mm
0.19685 in
1.15 kN0.44 kN—34000 rpm0.0026 kg2.6 g
FAG686-2Z-HLNDeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Width (B)
5 mm
0.19685 in
1.15 kN0.44 kN45500 rpm61000 rpm0.00268 kg2.68 g
INA686>NDeep groove ball bearing
Recorded bore (d)
6 mm
0.23622 in
Recorded outside dimension (D)
13 mm
0.511811 in
Catalogue width (symbol unverified)
3.5 mm
0.137795 in
1.15 kN0.44 kN36500 rpm72000 rpm0.00187 kg1.87 g
NSK686ADeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Bearing width (open) (B)
3.5 mm
0.137795 in
1.19 kN0.44 kN——0.00191 kg1.91 g
NSK686ADDDeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Catalogue width (symbol unverified)
5 mm
0.19685 in
1.19 kN0.44 kN———
NSK686AVVDeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Catalogue width (symbol unverified)
5 mm
0.19685 in
1.19 kN0.44 kN———
NSK686AZZ1Deep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outside diameter (D)
13 mm
0.511811 in
Catalogue width (symbol unverified)
5 mm
0.19685 in
1.19 kN0.44 kN——0.00269 kg2.69 g
EZO686 2RSDeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outer diameter (D)
13 mm
0.511811 in
Inner ring width (B)
5 mm
0.19685 in
1.08 kN0.438 kN——0.00254 kg2.54 g
EZO686ZZDeep groove ball bearing
Bore diameter (d)
6 mm
0.23622 in
Outer diameter (D)
13 mm
0.511811 in
Inner ring width (B)
5 mm
0.19685 in
1.08 kN0.438 kN——0.0025 kg2.5 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
KOYO 686OpenNot recordedNot recordedNot recordedNot recordedNot recorded
EZO 686Open (no closure suffix in this catalogue marking)Not recordedNot recordedNot recordedHigh-carbon chromium bearing steelNot recorded
FAG 686-2RSR>N2RSR — Contact seal on both sidesPN — Normal (ISO 492:2023)CN (Group N) — Normal internal clearanceJN — Steel sheet metalNot recordedLubricating grease
FAG 686-2Z-HLN2Z — Non-contact shield on both sidesPN — Normal (ISO 492:2023)CN (Group N) — Normal internal clearanceJN — Steel sheet metalNot recordedLubricating grease
INA 686>NNot recordedNot recordedNot recordedNot recordedNot recordedNot recorded
NSK 686AOpenNot recordedNot recordedNot recordedNot recordedNot recorded
NSK 686ADDContact rubber seals on both sides (DD)Not recordedNot recordedNot recordedNot recordedNot recorded
NSK 686AVVNon-contact rubber seals on both sides (VV)Not recordedNot recordedNot recordedNot recordedNot recorded
NSK 686AZZ1Metal shields on both sides (ZZ1)Not recordedNot recordedNot recordedNot recordedNot recorded
EZO 686 2RSTwo contact rubber sealsNot recordedNot recordedNot recordedHigh-carbon chromium bearing steelNot recorded
EZO 686ZZTwo pressed-steel shieldsNot 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.
Check load calculations →Estimate rating life →Decode the complete marking →Check replacement evidence →

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.

KOYO

686

Deep groove ball bearing

View full technical record →EZO

686

Deep groove ball bearing

View full technical record →KOYO

6860

Deep groove ball bearing

View full technical record →KOYO

68/600

Deep groove ball bearing

View full technical record →EZO

686 2RS

Deep groove ball bearing

View full technical record →FAG

686-2RSR>N

Deep groove ball bearing

View full technical record →FAG

686-2Z-HLN

Deep groove ball bearing

View full technical record →KOYO

68/630

Deep groove ball bearing

View full technical record →KOYO

6864

Deep groove ball bearing

View full technical record →KOYO

68/670

Deep groove ball bearing

View full technical record →KOYO

6868

Deep groove ball bearing

View full technical record →NSK

686A

Deep groove ball bearing

View full technical record →
Filter all 17 prefix results →

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.

Measurement guide →Cross-reference checks →

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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