Deep groove ball bearings
8,711 dimension rows · 8,711 model records · FAG, KOYO, NACHI, NSK, NTN, SKF
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Deep groove ball bearings: types, dimensions & brand filters
A versatile radial bearing family with some axial-load capability; single and double rows differ.
On this page9 sections ⌄
Deep groove ball bearings: rows, loads, variants and a verified size chart
Use the construction and complete marking together. The searchable table below retains manufacturer dimensions and links to existing product records; it does not approve an application or a cross-brand substitution.
Deep groove ball bearing size chart
8,711 verified model records across 6 recorded brands. Dimensions are d×D×B in mm. Row counts are shown only where the source explicitly supports them. This is a loaded reference subset, not a complete manufacturer catalogue.
Representative verified records are shown below. Enable JavaScript to search the full loaded table.
| Brand / full model | Rows | d (mm) | D (mm) | B (mm) | Recorded closure | Clearance | Precision |
|---|---|---|---|---|---|---|---|
| FAG688>N | Not reported | 8 | 16 | 4 | Without — Not sealed | CN (Group N) — Normal internal clearance | PN — Normal (ISO 492:2023) |
| FAGS688>N | Not reported | 8 | 16 | 4 | Without — Not sealed | CN (Group N) — Normal internal clearance | PN — Normal (ISO 492:2023) |
| KOYOML8012 | Not reported | 8 | 12 | 2.5 | Open | Not reported | Not reported |
| KOYOMLF8012 | Not reported | 8 | 12 | 2.5 | Open | Not reported | Not reported |
| NACHI6800 | Not reported | 10 | 19 | 5 | Open | Not reported | Not reported |
| NACHI6800-2NKE | Not reported | 10 | 19 | 5 | Two non-contact seals | Not reported | Not reported |
| NSKMF128 | Not reported | 8 | 12 | 2.5 | Open | Not reported | Not reported |
| NSKMR128 | Not reported | 8 | 12 | 2.5 | Open | Not reported | Not reported |
| NTN608 | Not reported | 8 | 22 | 7 | open | CN | Not reported |
| NTN608Z | Not reported | 8 | 22 | 7 | shield on one side | CN | Not reported |
| SKFW 637/8-2Z | 1 | 8 | 12 | 3.5 | Shield on both sides | CN | Not reported |
| SKFWBB1-8708-2RS1 | 1 | 8 | 14 | 4 | Seal on both sides | CN | Not reported |
| SKF4200 ATN9 | 2 | 10 | 30 | 14 | Without | CN | Not reported |
| SKF4201 ATN9 | 2 | 12 | 32 | 14 | Without | CN | Not reported |
| SKF4301 ATN9 | 2 | 12 | 37 | 17 | Without | CN | Not reported |
| SKF4202 ATN9 | 2 | 15 | 35 | 14 | Without | CN | Not reported |
| SKF4302 ATN9 | 2 | 15 | 42 | 17 | Without | CN | Not reported |
| SKF4203 ATN9 | 2 | 17 | 40 | 16 | Without | CN | Not reported |
| SKF4303 ATN9 | 2 | 17 | 47 | 19 | Without | CN | Not reported |
| SKF4204 ATN9 | 2 | 20 | 47 | 18 | Without | CN | Not reported |
| SKFW 61701-2RS1 | 1 | 12 | 18 | 4 | Seal on both sides | CN | Not reported |
| SKF61801 | 1 | 12 | 21 | 5 | Without | CN | P6 |
| SKF61801-2RS1 | 1 | 12 | 21 | 5 | Seal on both sides | CN | P6 |
| SKF61801-2Z | 1 | 12 | 21 | 5 | Shield on both sides | CN | P6 |
On a small screen, scroll the table sideways. Model text is a discovery filter, not an exact interchange match. Closure terminology is retained as recorded; similarly worded brand codes are not assumed equivalent. Unknown values are not zero.
Single row, double row and radial ball bearings
| Term | What it identifies | What it does not establish |
|---|---|---|
| Single-row deep groove | One ball row with grooved ring raceways | The closure, grease, accuracy, clearance or permitted speed |
| Double-row deep groove | Two ball rows in a deep-groove arrangement | Self-alignment or a drop-in replacement for two separate bearings |
| Radial ball bearing | A broad load-direction category that includes deep-groove and other ball-bearing constructions | That the bearing can carry only radial force |
| Double-row angular contact | A different contact geometry and arrangement | The same behaviour as double-row deep groove merely because both have two rows |
| Self-aligning ball bearing | A construction with a spherical outer-ring raceway | That an ordinary double-row deep-groove bearing can accommodate the same misalignment |
NSK's double-row deep-groove guidance explicitly excludes applications requiring angular misalignment compensation. Identify the actual structure before choosing a family or comparing sizes.
Can a radial deep-groove bearing carry axial or thrust load?
Ordinary deep-groove ball bearings can support radial load and axial load in either direction within their design limits. The statement that every radial ball bearing supports only radial load is therefore incorrect. A dedicated thrust bearing remains a different construction.
Do not use a single percentage of radial capacity as a universal axial limit. Row arrangement, internal clearance, filling slots and the manufacturer's calculation method change the answer. Basic dynamic rating C is not an allowable working load for every operating case.
A deep-groove bearing is not specified by the same fixed nominal contact-angle selection used for an angular-contact series. Its loaded contact geometry depends on the internal geometry, clearance and applied loads; do not assign every deep-groove bearing a 15°, 25° or 40° angle.
Seals, shields, snap rings and flanges solve different problems
| Feature | Purpose to check | Record before comparison |
|---|---|---|
| Open bearing | External lubrication and contamination-control arrangement | Lubricant supply, housing seals and operating environment |
| Shield or seal | Protection and lubricant retention with design-specific friction and speed limits | Exact suffix, one or both sides, contact type and factory lubricant |
| Snap-ring groove / snap ring | Axial location at the outer ring when used in the intended assembly | Groove dimensions and whether the ring itself is included |
| Integral flange | A projecting locating feature on the outer ring | Flange diameter and thickness in addition to d×D×B |
| Filling slot / maximum-capacity construction | A construction accommodating additional balls | Axial-load and speed restrictions for that particular design |
A snap ring is not a bearing seal, and a groove-only version is not the same component scope as a version supplied with a ring. Likewise, two bearings with the same d×D×B can differ in flange or groove geometry.
Advantages, limitations and application checks
| Need | Why this family may be considered | Check before selecting a model |
|---|---|---|
| General shaft support | Common radial rolling-bearing arrangement with axial support within its limits | Actual radial/axial loads, support arrangement and required life |
| Electric motor or fan | Low-friction designs and closure choices can suit rotating equipment | Speed conditions, grease, temperature, noise requirements and electrical damage risk |
| Space-constrained support | Thin-section and miniature variants exist | Verify the exact radial section, stiffness and capacity rather than choosing by bore alone |
| Corrosive environment | Stainless and other material variants exist | Material, seals and lubricant compatibility; stainless is not universal chemical resistance |
| Misaligned shaft or housing | A general deep-groove design is not a self-aligning solution | Identify deflection and alignment requirements before selecting a different construction |
Clearance, preload and tolerances are separate specifications
C3 identifies a clearance class; it is not an ABEC or precision grade. Shaft and housing fits and temperature differences can reduce the running clearance, so the unmounted catalogue clearance is not the final operating value.
Preload intentionally removes clearance and creates an internal load. It is not a generic remedy for noise or play. Use the equipment's arrangement and bearing-specific method; the size table cannot supply a universal preload force.
Boundary dimensions, dimensional/running accuracy and shaft/housing fit tolerances answer different questions. Keep the full precision and clearance suffixes when comparing similarly sized models.
How to use the deep-groove dimension chart
- Identify a complete bearing rather than a loose ball, a separate ring or a housing.
- Filter by brand, recorded row count and the named dimensions: d is bore, D is outside diameter, and B is width, all in millimetres.
- Open the complete product record to check closure, clearance, precision, load ratings and the original dimension labels.
- For a 12 mm shaft query, start with d = 12 mm, then establish the shaft fit and required D and B. Nominal bore equality alone does not approve the fit.
This is the verified subset currently loaded in BearingScope, not a manufacturer's complete or certified catalogue. Missing row counts stay unreported. For an official catalogue or drawing, check the exact model's document availability; this web table is not a substitute for an approved drawing.
Deep groove selection questions
Is a deep groove ball bearing the same as any ball bearing?
No. Ball bearing describes the rolling-element type. Deep-groove, angular-contact, self-aligning and thrust ball bearings differ in raceways, load directions and arrangements.
Is a deep groove roller bearing the same thing?
The phrase mixes two constructions. A deep-groove ball bearing uses balls; identify the intended roller-bearing family separately if the rolling elements are rollers.
Does double row mean twice the single-row load rating?
No. Use the exact model's published ratings and geometry. Two rows do not justify multiplying another bearing's rating or treating the arrangement as interchangeable.
Can I obtain CAD or the official catalogue PDF here?
Only a verified, permitted and exact-matching document may be provided. The product record and drawings lookup state availability; no unverified PDF or invented CAD is supplied.
Why do some table rows have no row count?
Their dimensions are supported by stored manufacturer fields, but an explicit row-count field or unambiguous manufacturer construction description was not recorded. They are not silently classified as single row.
Original BearingScope reference, reviewed 3 October 2026. Technical basis: NSK: The Anatomy of Deep Groove Ball Bearings; NSK: Double-Row Ball Bearings and Customized Ball Bearings; SKF: Rolling Bearings, deep-groove designs and variants. Dimension table verified against stored manufacturer fields on 2026-10-03. Confirm the complete designation, operating limits and assembly requirements before using a candidate in an application.
What is this bearing type?
A deep groove ball bearing guides balls between grooved inner and outer rings. It is a radial bearing that can also carry axial load in either direction within the limits of the exact design. “Ball bearing” is a broader term: angular contact, self-aligning and thrust ball bearings are different structures.
| Part or design | What it does | What to verify |
|---|---|---|
| Rings and raceways | The inner and outer grooves guide the balls. | Check the complete bearing, not a loose ball diameter. |
| Balls and cage | The balls transmit load; a cage separates them in caged designs. | Cage design is part of the exact variant. |
| Closures | Open, shielded and sealed forms are available. | A seal or shield suffix changes the specification, not just the name. |
On a small screen, scroll the table horizontally to read all three columns.
Variants that change the answer
Single-row, double-row, miniature and maximum-capacity filling-slot designs are not one interchangeable construction. Filling slots affect allowable axial loading; do not transfer ordinary single-row assumptions to every variant.
What the family name cannot tell you
This family name does not establish a permissible speed, load, temperature or misalignment angle. A 608 search can contain several closures, clearances and materials with the same nominal envelope.
Identify the exact part before comparing
- Read the full ring marking and retain every suffix.
- Use the model table below to inspect recorded dimensions, closure, clearance and precision.
- Compare dynamic/static ratings and the specified lubrication and speed conditions before selecting a candidate.
Inspect real catalogue records below →2RS and ZZ comparison →Angular contact designs →Model dimension charts →
Technical reference basis: NSK: Deep Groove Ball Bearings. Explanation and lookup workflow: BearingScope. Manufacturer-specific limits remain attached to the exact product record.
Application starting points
Where this family is used
Electric motors, fans and general rotating equipment.
Read equipment selection guides →Do not skip
Selection and interchange checks
Match envelope, load ratings, closure, clearance, cage, tolerance class and lubrication.
Full verification checklist →Database-backed results
13,851 recordsDeep groove ball bearings — actual products
First 12 records. Open all results to filter brands and technical attributes. These are search candidates, not approved replacements.
| Brand / complete designation | Type | d×D×B (mm) | Closure | Original precision | Clearance |
|---|---|---|---|---|---|
| TIMKEN104K | Deep groove ball bearing | 20×42×9 | Open | Not reported | Not reported |
| TIMKEN120W2 | Deep groove ball bearing | 100×160×28 | Open | Not reported | Not reported |
| TIMKEN120WD2N | Deep groove ball bearing | 100×160×28 | Shielded | Not reported | Not reported |
| TIMKEN122WD2NBR | Deep groove ball bearing | 110×175×35 | Shielded | Not reported | Not reported |
| TIMKEN124WDBR | Deep groove ball bearing | 120×190×32 | Shielded | Not reported | Not reported |
| TIMKEN126WBR | Deep groove ball bearing | 130×205×34 | Open | Not reported | Not reported |
| TIMKEN126WDBR | Deep groove ball bearing | 130×205×34 | Shielded | Not reported | Not reported |
| TIMKEN128WBR | Deep groove ball bearing | 140×220×36 | Open | Not reported | Not reported |
| SKF12G-88128 TN9/GJN | Deep groove ball bearing | —×—×— | Not reported | Not reported | Not reported |
| TIMKEN130WDBR | Deep groove ball bearing | 150×235×38 | Shielded | Not reported | Not reported |
| TIMKEN132WBR | Deep groove ball bearing | 160×250×40 | Open | Not reported | Not reported |
| KOYO16001 | Deep groove ball bearing | 12×28×7 | Open | Not reported | Not reported |
— = not recorded. Width conventions differ for tapered assemblies, thrust bearings and mounted units. Always inspect the dimensional drawing.
Filter all 13,851 records →All recorded subtypes in this family
Original catalogue descriptions are preserved in the records. Identical display names, including singular/plural variants, share one combined entry. Selecting a subtype opens its brand and technical filters.
Deep groove ball bearings11,033Deep groove ball bearing for high temperature applications34Deep groove ball bearing for high temperature applications with shields on both sides88Deep groove ball bearing with filling slot90Deep groove ball bearing with filling slots34Deep groove ball bearing with filling slots and integral sealing78Deep groove ball bearing with filling slots and snap ring27Deep groove ball bearing with filling slots and snap ring groove2Deep groove ball bearing with seals164Deep groove ball bearing with seals or shields1,024Deep groove ball bearing with snap ring76Deep groove ball bearing with snap ring and integral sealing78Deep groove ball bearing with snap ring groove31Deep groove ball bearing with snap ring groove and integral sealing3Double row deep groove ball bearing32Hybrid ceramic deep groove ball bearing84Hybrid ceramic deep groove ball bearing for wind turbine generators9Hybrid ceramic deep groove ball bearing with low-friction seals on both sides18Hybrid ceramic deep groove ball bearing with seals on both sides44Hybrid ceramic deep groove ball bearing with shields22Insocoat® deep groove ball bearing63Reali-slim thin section radial contact ball bearing326Reali-slim thin section radial contact ball bearing with seals or shields99Skf ceradrive, hybrid ceramic deep groove ball bearing optimized for industrial electric motor6Skf deep groove ball bearing for highly contaminated environments29Skf food line deep groove ball bearing with seals18Skf food line stainless steel deep groove ball bearing with integral sealing19Stainless steel deep groove ball bearing68Stainless steel deep groove ball bearing with flanged outer ring and integral sealing24Stainless steel deep groove ball bearing with integral sealing214Ultra-slim thin section radial contact ball bearing14
No subtype matches this text.
Look up real bearing dimensions
Choose a bearing structure, then enter the dimensions you know. You can leave unknown dimensions blank. The chart contains 29,253 catalogue records whose bore, outside diameter and width or height symbols have been checked against retained manufacturer properties. It is not a complete ISO standard or an interchange list.
Changing units converts entered values; it does not reinterpret 12.7 mm as 12.7 inches. Inch fractions such as 1/2 are accepted. A blank field means unknown, not zero.
Showing the first 24 of 8,711 Deep groove ball bearings records. Filters apply immediately.
| Brand / complete designation | Original construction | Bore d | Outside D | Width / height | Recorded closure |
|---|---|---|---|---|---|
| KOYO681 | Deep groove ball bearing | 1 mm | 3 mm | 1 mm (B) | Open |
| NSK681 | Deep groove ball bearing | 1 mm | 3 mm | 1 mm (B) | Open |
| KOYOF681 | Deep groove ball bearing | 1 mm | 3 mm | 1 mm (B) | Open |
| NSKF681 | Deep groove ball bearing | 1 mm | 3 mm | 1 mm (B) | Open |
| SKFW 618/1 | Stainless steel deep groove ball bearing | 1 mm | 3 mm | 1 mm (B) | Without |
| KOYOML1003 | Deep groove ball bearing | 1 mm | 3 mm | 1.5 mm (B) | Open |
| NSKMR31 | Deep groove ball bearing | 1 mm | 3 mm | 1.5 mm (B) | Open |
| KOYO691 | Deep groove ball bearing | 1 mm | 4 mm | 1.6 mm (B) | Open |
| NSK691 | Deep groove ball bearing | 1 mm | 4 mm | 1.6 mm (B) | Open |
| KOYOF691 | Deep groove ball bearing | 1 mm | 4 mm | 1.6 mm (B) | Open |
| NSKF691 | Deep groove ball bearing | 1 mm | 4 mm | 1.6 mm (B) | Open |
| NSKR09 | Deep groove ball bearing | 1.016 mm | 3.175 mm | 1.191 mm (B) | Open |
| NSKFR0 | Deep groove ball bearing | 1.191 mm | 3.967 mm | 1.588 mm (B) | Open |
| NSKR0 | Deep groove ball bearing | 1.191 mm | 3.967 mm | 1.588 mm (B) | Open |
| NSKMF41X | Deep groove ball bearing | 1.2 mm | 4 mm | 1.8 mm (B) | Open |
| KOYOML1204 | Deep groove ball bearing | 1.2 mm | 4 mm | 1.8 mm (B) | Open |
| NSKMR41X | Deep groove ball bearing | 1.2 mm | 4 mm | 1.8 mm (B) | Open |
| NSKFR1 | Deep groove ball bearing | 1.397 mm | 4.762 mm | 1.984 mm (B) | Open |
| NSKR1 | Deep groove ball bearing | 1.397 mm | 4.762 mm | 1.984 mm (B) | Open |
| KOYO68/1.5 | Deep groove ball bearing | 1.5 mm | 4 mm | 1.2 mm (B) | Open |
| NSK681X | Deep groove ball bearing | 1.5 mm | 4 mm | 1.2 mm (B) | Open |
| KOYOF68/1.5 | Deep groove ball bearing | 1.5 mm | 4 mm | 1.2 mm (B) | Open |
| NSKF681X | Deep groove ball bearing | 1.5 mm | 4 mm | 1.2 mm (B) | Open |
| SKFW 618/1.5 | Stainless steel deep groove ball bearing | 1.5 mm | 4 mm | 1.2 mm (B) | Without |
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Read the width symbol: B, T and H are not interchangeable labels. For a tapered pair use assembly T, not the cone width. Needle designs without an inner ring may use roller-set bore Fw instead of d and are outside this d/D chart. Matched sets, housings and loose cups/cones are also excluded. Open the full product to check drawings, ratings, seals, clearance and precision.
Snapshot 2026-10-02. Every row keeps its actual product link and source-reported units; missing or ambiguous geometry is withheld. Equal nominal size alone does not approve replacement. Inch display is a conversion, rounded to six decimals, not an inch-series classification.
Bearing size charts: PDF downloads
Download searchable English tables with the brand, complete designation, source-labelled dimensions in millimetres and links to the matching model records. Choose a family or a series; the charts preserve construction differences instead of treating every size as interchangeable.
Scope: original BearingScope reference tables from our verified catalogue snapshots. These are not manufacturer manuals, CAD, full technical datasheets or a complete list of all bearing sizes. Equal dimensions do not establish interchangeability. No load ratings, tolerances or vehicle fitment are inferred.
Download PDF
6000 series ball bearings
1,418 dimension rows · 1,418 model records · FAG, KOYO, NACHI, NSK, NTN, SKF
6200 series ball bearings
1,909 dimension rows · 1,909 model records · FAG, KOYO, NACHI, NSK, NTN, SKF
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.