# Thrust ball bearings 51200 and 51300 series (51204, 51205, 51206, 51305, 51306 and more): bore, OD, height, r, housing washer bore + 11 ring-envelope STEP/STL files

> What are the dimensions of a 51205, 51206, 51305 or 51306 thrust ball bearing: bore, outside diameter, height and housing washer bore?

- Category: Hardware › Bearings, rails & motion
- Kind: Standard part
- Basis: NSK values via TFL Bearing (d, D, T, r min, d1, D1) checked on d, D, T against Emerson Bearing's 51200 and 51300 lists; NSK's 51205 page and McMaster-Carr linked
- Page: https://xemstudio.com/objects/thrust-ball-bearings-51200-51300-series/ · JSON: https://xemstudio.com/api/geometry?object=thrust-ball-bearings-51200-51300-series · Plain text: https://xemstudio.com/objects/thrust-ball-bearings-51200-51300-series/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no tolerance added.

## Notes

- A single-direction thrust ball bearing carries axial load in one direction only: a shaft washer (bore d, on the shaft) and a housing washer (bore D1, sits in the housing), with a ball and cage set between them. It is what sits under a lead screw, a vertical shaft or a hand-wheel stack. 512xx is the light series (12 dimension series) and 513xx the medium series; the 511xx series is on its own page.
- Numbers: the NSK values as republished by TFL Bearing (d, D, T, r min, d1, D1 for 51200 to 51272 and 51305 to 51340), with Emerson Bearing's 51200 and 51300 lists as the independent check on d, D and T (every Emerson row agrees; Emerson has no 51338 and no rows above 51230 in the 51200 series). NSK's own 51205 page gives the same row (25, 47, 15, r 0.6, d1 47, D1 27).
- d1 equals D on all rows up to 51224 and 51320; from 51226 (51322 in the 513 series) the shaft washer is a little smaller than the housing washer (marked X in the NSK list), e.g. 51226: d1 187 vs D 190. The envelope files use D as the OD.
- Files: 11 ring envelopes (51204, 51205, 51206, 51208, 51210, 51212, 51305, 51306, 51308, 51310, 51312): one solid ring, bore d, OD D, height T, corners rounded at r min. Washers, balls and cage are not drawn.
- Left out: limiting speeds and load ratings (the makers differ), double-direction 522xx / 523xx, spherical-seat 53xxx, 514xx and above, and the mass column.

## Sizes

| bearing | bore d (shaft washer), mm | OD D, mm | height T, mm | r min, mm | shaft washer OD d1, mm | housing washer bore D1, mm | source |
|---|---|---|---|---|---|---|---|
| 51200 | 10 | 26 | 11 | 0.6 | 26 | 12 | NSK (TFL) + Emerson |
| 51201 | 12 | 28 | 11 | 0.6 | 28 | 14 | NSK (TFL) + Emerson |
| 51202 | 15 | 32 | 12 | 0.6 | 32 | 17 | NSK (TFL) + Emerson |
| 51203 | 17 | 35 | 12 | 0.6 | 35 | 19 | NSK (TFL) + Emerson |
| 51204 | 20 | 40 | 14 | 0.6 | 40 | 22 | NSK (TFL) + Emerson |
| 51205 | 25 | 47 | 15 | 0.6 | 47 | 27 | NSK (TFL) + Emerson |
| 51206 | 30 | 52 | 16 | 0.6 | 52 | 32 | NSK (TFL) + Emerson |
| 51207 | 35 | 62 | 18 | 1 | 62 | 37 | NSK (TFL) + Emerson |
| 51208 | 40 | 68 | 19 | 1 | 68 | 42 | NSK (TFL) + Emerson |
| 51209 | 45 | 73 | 20 | 1 | 73 | 47 | NSK (TFL) + Emerson |
| 51210 | 50 | 78 | 22 | 1 | 78 | 52 | NSK (TFL) + Emerson |
| 51211 | 55 | 90 | 25 | 1 | 90 | 57 | NSK (TFL) + Emerson |
| 51212 | 60 | 95 | 26 | 1 | 95 | 62 | NSK (TFL) + Emerson |
| 51213 | 65 | 100 | 27 | 1 | 100 | 67 | NSK (TFL) + Emerson |
| 51214 | 70 | 105 | 27 | 1 | 105 | 72 | NSK (TFL) + Emerson |
| 51215 | 75 | 110 | 27 | 1 | 110 | 77 | NSK (TFL) + Emerson |
| 51216 | 80 | 115 | 28 | 1 | 115 | 82 | NSK (TFL) + Emerson |
| 51217 | 85 | 125 | 31 | 1 | 125 | 88 | NSK (TFL) + Emerson |
| 51218 | 90 | 135 | 35 | 1.1 | 135 | 93 | NSK (TFL) + Emerson |
| 51220 | 100 | 150 | 38 | 1.1 | 150 | 103 | NSK (TFL) + Emerson |
| 51222 | 110 | 160 | 38 | 1.1 | 160 | 113 | NSK (TFL) + Emerson |
| 51224 | 120 | 170 | 39 | 1.1 | 170 | 123 | NSK (TFL) + Emerson |
| 51226 | 130 | 190 | 45 | 1.5 | 187 | 133 | NSK (TFL) + Emerson |
| 51228 | 140 | 200 | 46 | 1.5 | 197 | 143 | NSK (TFL) + Emerson |
| 51230 | 150 | 215 | 50 | 1.5 | 212 | 153 | NSK (TFL) + Emerson |
| 51232 | 160 | 225 | 51 | 1.5 | 222 | 163 | NSK (TFL) |
| 51234 | 170 | 240 | 55 | 1.5 | 237 | 173 | NSK (TFL) |
| 51236 | 180 | 250 | 56 | 1.5 | 247 | 183 | NSK (TFL) |
| 51238 | 190 | 270 | 62 | 2 | 267 | 194 | NSK (TFL) |
| 51240 | 200 | 280 | 62 | 2 | 277 | 204 | NSK (TFL) |
| 51244 | 220 | 300 | 63 | 2 | 297 | 224 | NSK (TFL) |
| 51248 | 240 | 340 | 78 | 2.1 | 335 | 244 | NSK (TFL) |
| 51252 | 260 | 360 | 79 | 2.1 | 355 | 264 | NSK (TFL) |
| 51256 | 280 | 380 | 80 | 2.1 | 375 | 284 | NSK (TFL) |
| 51260 | 300 | 420 | 95 | 3 | 415 | 304 | NSK (TFL) |
| 51264 | 320 | 440 | 95 | 3 | 435 | 325 | NSK (TFL) |
| 51268 | 340 | 460 | 96 | 3 | 455 | 345 | NSK (TFL) |
| 51272 | 360 | 500 | 110 | 4 | 495 | 365 | NSK (TFL) |
| 51305 | 25 | 52 | 18 | 1 | 52 | 27 | NSK (TFL) + Emerson |
| 51306 | 30 | 60 | 21 | 1 | 60 | 32 | NSK (TFL) + Emerson |
| 51307 | 35 | 68 | 24 | 1 | 68 | 37 | NSK (TFL) + Emerson |
| 51308 | 40 | 78 | 26 | 1 | 78 | 42 | NSK (TFL) + Emerson |
| 51309 | 45 | 85 | 28 | 1 | 85 | 47 | NSK (TFL) + Emerson |
| 51310 | 50 | 95 | 31 | 1.1 | 95 | 52 | NSK (TFL) + Emerson |
| 51311 | 55 | 105 | 35 | 1.1 | 105 | 57 | NSK (TFL) + Emerson |
| 51312 | 60 | 110 | 35 | 1.1 | 110 | 62 | NSK (TFL) + Emerson |
| 51313 | 65 | 115 | 36 | 1.1 | 115 | 67 | NSK (TFL) + Emerson |
| 51314 | 70 | 125 | 40 | 1.1 | 125 | 72 | NSK (TFL) + Emerson |
| 51315 | 75 | 135 | 44 | 1.5 | 135 | 77 | NSK (TFL) + Emerson |
| 51316 | 80 | 140 | 44 | 1.5 | 140 | 82 | NSK (TFL) + Emerson |
| 51317 | 85 | 150 | 49 | 1.5 | 150 | 88 | NSK (TFL) + Emerson |
| 51318 | 90 | 155 | 50 | 1.5 | 155 | 93 | NSK (TFL) + Emerson |
| 51320 | 100 | 170 | 55 | 1.5 | 170 | 103 | NSK (TFL) + Emerson |
| 51322 | 110 | 190 | 63 | 2 | 187 | 113 | NSK (TFL) + Emerson |
| 51324 | 120 | 210 | 70 | 2.1 | 205 | 123 | NSK (TFL) + Emerson |
| 51326 | 130 | 225 | 75 | 2.1 | 220 | 134 | NSK (TFL) + Emerson |
| 51328 | 140 | 240 | 80 | 2.1 | 235 | 144 | NSK (TFL) + Emerson |
| 51330 | 150 | 250 | 80 | 2.1 | 245 | 154 | NSK (TFL) + Emerson |
| 51332 | 160 | 270 | 87 | 3 | 265 | 164 | NSK (TFL) + Emerson |
| 51334 | 170 | 280 | 87 | 3 | 275 | 174 | NSK (TFL) + Emerson |
| 51336 | 180 | 300 | 95 | 3 | 295 | 184 | NSK (TFL) + Emerson |
| 51338 | 190 | 320 | 105 | 4 | 315 | 195 | NSK (TFL) |
| 51340 | 200 | 340 | 110 | 4 | 335 | 205 | NSK (TFL) + Emerson |

## Where the files are

- TFL Bearing (NSK designations): [Thrust ball bearings of the series 512 and 513: d, D, T, r min, shaft washer d1, housing washer bore D1 (NSK values)](https://tflbearing.com/products/ball-bearings/thrust-ball-bearings-of-the-series-512) — web — Publisher's page; dimensions are facts
- TFL Bearing (NSK designations): [Thrust ball bearings of the series 513: d, D, T, r min, d1, D1 (NSK values)](https://tflbearing.com/?p=7960) — web — Publisher's page; dimensions are facts
- Emerson Bearing: [51200 series light-duty ball thrust bearings: d, D, T, loads, speeds](https://products.emersonbearing.com/viewitems/ball-thrust-ball-bearings/51200-series-light-duty-ball-thrust-ball-bearings?plpver=10) — web — Publisher's page; dimensions are facts
- Emerson Bearing: [51300 series medium-duty ball thrust bearings: d, D, T, loads, speeds](https://products.emersonbearing.com/viewitems/ball-thrust-ball-bearings/51300-series-medium-duty-ball-thrust-ball-bearings?plpver=10) — web — Publisher's page; dimensions are facts
- NSK: [51205 single-direction thrust ball bearing: d 25, D 47, T 15, r 0.6, d1 47, D1 27 (page with CAD tab)](https://www.nsk.com/engineering/51205-apn.html) — web — Publisher's page; dimensions are facts
- McMaster-Carr: [Open thrust ball bearings (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/open-thrust-ball-bearings) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Free STEP/STL (11 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/index.json

- 51204-thrust-ball-bearing-envelope-20x40x14: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51204-thrust-ball-bearing-envelope-20x40x14.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51204-thrust-ball-bearing-envelope-20x40x14.stl) — 51204 thrust ball bearing ring envelope: bore Ø20, OD Ø40, height 14; one solid ring, corners rounded at r min 0.6; the housing washer bore Ø22 and the shaft washer OD Ø40 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51205-thrust-ball-bearing-envelope-25x47x15: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51205-thrust-ball-bearing-envelope-25x47x15.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51205-thrust-ball-bearing-envelope-25x47x15.stl) — 51205 thrust ball bearing ring envelope: bore Ø25, OD Ø47, height 15; one solid ring, corners rounded at r min 0.6; the housing washer bore Ø27 and the shaft washer OD Ø47 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51206-thrust-ball-bearing-envelope-30x52x16: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51206-thrust-ball-bearing-envelope-30x52x16.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51206-thrust-ball-bearing-envelope-30x52x16.stl) — 51206 thrust ball bearing ring envelope: bore Ø30, OD Ø52, height 16; one solid ring, corners rounded at r min 0.6; the housing washer bore Ø32 and the shaft washer OD Ø52 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51208-thrust-ball-bearing-envelope-40x68x19: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51208-thrust-ball-bearing-envelope-40x68x19.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51208-thrust-ball-bearing-envelope-40x68x19.stl) — 51208 thrust ball bearing ring envelope: bore Ø40, OD Ø68, height 19; one solid ring, corners rounded at r min 1; the housing washer bore Ø42 and the shaft washer OD Ø68 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51210-thrust-ball-bearing-envelope-50x78x22: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51210-thrust-ball-bearing-envelope-50x78x22.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51210-thrust-ball-bearing-envelope-50x78x22.stl) — 51210 thrust ball bearing ring envelope: bore Ø50, OD Ø78, height 22; one solid ring, corners rounded at r min 1; the housing washer bore Ø52 and the shaft washer OD Ø78 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51212-thrust-ball-bearing-envelope-60x95x26: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51212-thrust-ball-bearing-envelope-60x95x26.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51212-thrust-ball-bearing-envelope-60x95x26.stl) — 51212 thrust ball bearing ring envelope: bore Ø60, OD Ø95, height 26; one solid ring, corners rounded at r min 1; the housing washer bore Ø62 and the shaft washer OD Ø95 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51305-thrust-ball-bearing-envelope-25x52x18: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51305-thrust-ball-bearing-envelope-25x52x18.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51305-thrust-ball-bearing-envelope-25x52x18.stl) — 51305 thrust ball bearing ring envelope: bore Ø25, OD Ø52, height 18; one solid ring, corners rounded at r min 1; the housing washer bore Ø27 and the shaft washer OD Ø52 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51306-thrust-ball-bearing-envelope-30x60x21: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51306-thrust-ball-bearing-envelope-30x60x21.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51306-thrust-ball-bearing-envelope-30x60x21.stl) — 51306 thrust ball bearing ring envelope: bore Ø30, OD Ø60, height 21; one solid ring, corners rounded at r min 1; the housing washer bore Ø32 and the shaft washer OD Ø60 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51308-thrust-ball-bearing-envelope-40x78x26: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51308-thrust-ball-bearing-envelope-40x78x26.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51308-thrust-ball-bearing-envelope-40x78x26.stl) — 51308 thrust ball bearing ring envelope: bore Ø40, OD Ø78, height 26; one solid ring, corners rounded at r min 1; the housing washer bore Ø42 and the shaft washer OD Ø78 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51310-thrust-ball-bearing-envelope-50x95x31: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51310-thrust-ball-bearing-envelope-50x95x31.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51310-thrust-ball-bearing-envelope-50x95x31.stl) — 51310 thrust ball bearing ring envelope: bore Ø50, OD Ø95, height 31; one solid ring, corners rounded at r min 1.1; the housing washer bore Ø52 and the shaft washer OD Ø95 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values
- 51312-thrust-ball-bearing-envelope-60x110x35: [STEP](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51312-thrust-ball-bearing-envelope-60x110x35.step) · [STL](https://xemstudio.com/files/hardware/thrust-ball-bearings-51200-51300-series/51312-thrust-ball-bearing-envelope-60x110x35.stl) — 51312 thrust ball bearing ring envelope: bore Ø60, OD Ø110, height 35; one solid ring, corners rounded at r min 1.1; the housing washer bore Ø62 and the shaft washer OD Ø110 are in the table, not drawn (washer thicknesses are not in the tables read); no balls or cage; nominal values

## Questions

**What are the dimensions of a 51205 thrust bearing?**

Bore 25, OD 47, height 15 mm, r min 0.6; shaft washer OD 47 and housing washer bore 27 mm (NSK).

**What are the dimensions of a 51206 thrust bearing?**

Bore 30, OD 52, height 16 mm; housing washer bore 32 mm.

**What are the dimensions of a 51305 thrust bearing?**

Bore 25, OD 52, height 18 mm, r min 1; housing washer bore 27 mm.

**What is the difference between 51205 and 51305?**

Same 25 mm bore; the 513 series is the heavier one: 52 mm OD and 18 mm high instead of 47 and 15.

**What is the housing washer bore of a 51204?**

22 mm: the housing washer's bore is 2 mm larger than the 20 mm shaft washer bore, so it floats clear of the shaft.

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