Bearing reference · 34 designations

Identify a bearing from the numbers—or the measurements

Measure the bore, outside diameter and width. The finder compares those dimensions with common miniature 608 plus common 6000, 6200 and 6300 series deep groove ball bearings and gives you the basic designation.

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Dimension finder

Bore × outside diameter × width

Enter any dimensions you know in millimetres. Exact matches appear first, followed by readings within 0.5 mm. Leave a field blank if the corresponding surface cannot be measured reliably.

Bore d / ID, mmOutside diameter D / OD, mmWidth B, mm

Matching designations

34 matches

608608 series8 × 22 × 7 mm 60006000 series10 × 26 × 8 mm 60016000 series12 × 28 × 8 mm 60026000 series15 × 32 × 9 mm 60036000 series17 × 35 × 10 mm 60046000 series20 × 42 × 12 mm 60056000 series25 × 47 × 12 mm 60066000 series30 × 55 × 13 mm 60076000 series35 × 62 × 14 mm 60086000 series40 × 68 × 15 mm 60096000 series45 × 75 × 16 mm 60106000 series50 × 80 × 16 mm 62006200 series10 × 30 × 9 mm 62016200 series12 × 32 × 10 mm 62026200 series15 × 35 × 11 mm 62036200 series17 × 40 × 12 mm 62046200 series20 × 47 × 14 mm 62056200 series25 × 52 × 15 mm 62066200 series30 × 62 × 16 mm 62076200 series35 × 72 × 17 mm 62086200 series40 × 80 × 18 mm 62096200 series45 × 85 × 19 mm 62106200 series50 × 90 × 20 mm 63006300 series10 × 35 × 11 mm 63016300 series12 × 37 × 12 mm 63026300 series15 × 42 × 13 mm 63036300 series17 × 47 × 14 mm 63046300 series20 × 52 × 15 mm 63056300 series25 × 62 × 17 mm 63066300 series30 × 72 × 19 mm 63076300 series35 × 80 × 21 mm 63086300 series40 × 90 × 23 mm 63096300 series45 × 100 × 25 mm 63106300 series50 × 110 × 27 mm

Browse by series

608

1 designations

A common miniature deep groove ball bearing with an 8 mm bore and ISO dimension series 08 envelope.

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6000

11 designations

ISO dimension series 10 deep groove ball bearings, commonly called the extra-light series.

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6200

11 designations

ISO dimension series 02 deep groove ball bearings, commonly called the light series.

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6300

11 designations

ISO dimension series 03 deep groove ball bearings, commonly called the medium series.

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Identify and specify

Bearing guides built around the buying decision

N vs NR bearing suffixes: snap-ring groove and locating ring

Understand N and NR deep groove bearing suffixes, ISO 464 snap-ring groove geometry and the difference between a bearing groove and a shaft or housing groove.

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How to measure a bearing: bore, outside diameter and width

Measure a radial bearing's bore, outside diameter and width in millimetres, record its full marking and use both to identify a replacement.

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Bearing seals and shields: 2RS, 2Z, ZZ, DDU, LLU and other suffixes

Compare open, shielded, contact-sealed and non-contact-sealed deep groove bearings without treating manufacturer-specific suffixes as exact equivalents.

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Bearing clearance explained: C2, CN, C3 and C4

Understand radial internal-clearance classes, how mounting fits and ring temperatures affect operating clearance, and why C3 is not a universal upgrade.

Read the guide →

What the designation does—and does not tell you

For a standard deep groove ball bearing, the basic designation identifies its dimension series and nominal boundary dimensions. For bore codes from 04 upwards, the last two digits multiplied by five give the bore in millimetres; 00, 01, 02 and 03 are the exceptions at 10, 12, 15 and 17 mm.

It does not completely specify the bearing. Suffixes identify shields, seals, internal clearance, cage and other manufacturer-dependent features. Match the complete marking before ordering, not only the four-digit basic number.

Sources and scope

This first release covers standard boundary dimensions only. It does not publish load ratings, speed limits, tolerances or claim that every closure and clearance variant is interchangeable.

NSK Rolling Bearings for Industrial Machinery, Part C, section 1 — Deep Groove Ball BearingsBoundary-dimension tables beginning at page C 005; the published rows were checked against the applicable table spread.
ISO 15:2017 — Rolling bearings — Radial bearings — Boundary dimensions, general planThe standards-level context for nominal radial-bearing boundary dimensions; the numerical values here were read from NSK's published tables.
NSK Bearing Calculation Tool — 608NSK's current product calculation record gives the 608 boundary dimensions as 8 × 22 × 7 mm.