# Retaining rings DIN 472 (internal, for bores): ring dimensions and groove diameter d2 × width m, 8 to 110 mm

> What groove diameter and width does a DIN 472 internal retaining ring (circlip) need in a bore, and what are the ring's thickness and lug sizes?

- Category: Hardware › Bearings, rails & motion
- Kind: Standard part
- Basis: DIN 472:2017 table as published by Maedler (d1, s, d2, m, d3, a, b); four rows cross-checked; McMaster-Carr linked for CAD
- Page: https://xemstudio.com/objects/retaining-rings-din-472-internal/ · JSON: https://xemstudio.com/api/geometry?object=retaining-rings-din-472-internal · Plain text: https://xemstudio.com/objects/retaining-rings-din-472-internal/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 printing tolerance added.

## Notes

- DIN 472 is the internal retaining ring for bores: the ring sits in a groove cut into the housing bore and presses outward. Groove diameter d2 is larger than the bore d1 (depth = (d2 − d1) / 2, computed here), groove width m is the ring thickness + 0.1 mm up to 1.75 mm rings and + 0.15 mm from 2.0 mm rings up (true on every row). The ring numbers are thickness s, free outside diameter d3, lug width a and ring width b.
- Table: 8 to 110 mm as printed in Maedler's DIN 472:2017 data sheet. Four rows (10, 20, 30, 38 mm) agree with an example table on Sunhyings' page; no second full table was readable, so a, b and d3 are from Maedler only. The groove depth column is derived from d1 and d2, not printed.
- Files: grooved test sleeves for 11 sizes, bore d1 with the groove d2 × m, nominal. The sleeve's outside diameter (d2 + 6 mm), length (16 mm) and groove position are an example chosen here, not published; d1, d2 and m are the standard's. A bearing seat that needs a ring combines this groove with the bearing OD (see the deep-groove bearing pages).
- Left out: the ring outline (lug shape and gap are not fully published), the lug-hole diameter d5 and the groove edge margin n (not in the table used), sizes below 8 mm and above 110 mm, heavy type.
- McMaster-Carr: its DIN retaining ring category is linked below (it covers DIN 471 and DIN 472 rings); inch internal rings are also stocked there under MS 16625-type listings, but that size table was not readable here, so no inch numbers are given.

## Sizes

| bore d1, mm | ring thickness s, mm | ring free outer Ø d3, mm | lug width a (max), mm | ring width b (approx), mm | groove Ø d2, mm | groove width m, mm | groove depth (d2 − d1) / 2, mm |
|---|---|---|---|---|---|---|---|
| 8 | 0.8 | 8.7 | 2.4 | 1.1 | 8.4 | 0.9 | 0.2 |
| 10 | 1 | 10.8 | 3.2 | 1.4 | 10.4 | 1.1 | 0.2 |
| 11 | 1 | 11.8 | 3.3 | 1.5 | 11.4 | 1.1 | 0.2 |
| 12 | 1 | 13 | 3.4 | 1.7 | 12.5 | 1.1 | 0.25 |
| 13 | 1 | 14.1 | 3.6 | 1.8 | 13.6 | 1.1 | 0.3 |
| 14 | 1 | 15.1 | 3.7 | 1.8 | 14.6 | 1.1 | 0.3 |
| 15 | 1 | 16.2 | 3.7 | 2 | 15.7 | 1.1 | 0.35 |
| 16 | 1 | 17.3 | 3.8 | 2 | 16.8 | 1.1 | 0.4 |
| 17 | 1 | 18.3 | 3.9 | 2.1 | 17.8 | 1.1 | 0.4 |
| 18 | 1 | 19.5 | 4.1 | 2.2 | 19 | 1.1 | 0.5 |
| 19 | 1 | 20.5 | 4.1 | 2.2 | 20 | 1.1 | 0.5 |
| 20 | 1 | 21.5 | 4.1 | 2.3 | 21 | 1.1 | 0.5 |
| 21 | 1 | 22.5 | 4.2 | 2.4 | 22 | 1.1 | 0.5 |
| 22 | 1 | 23.5 | 4.2 | 2.5 | 23 | 1.1 | 0.5 |
| 24 | 1.2 | 25.9 | 4.3 | 2.6 | 25.2 | 1.3 | 0.6 |
| 25 | 1.2 | 26.9 | 4.5 | 2.7 | 26.2 | 1.3 | 0.6 |
| 26 | 1.2 | 27.9 | 4.7 | 2.8 | 27.2 | 1.3 | 0.6 |
| 28 | 1.2 | 30.1 | 4.8 | 2.9 | 29.4 | 1.3 | 0.7 |
| 30 | 1.2 | 32.1 | 4.8 | 3 | 31.4 | 1.3 | 0.7 |
| 32 | 1.2 | 34.4 | 5.4 | 3.2 | 33.7 | 1.3 | 0.85 |
| 35 | 1.5 | 37.8 | 5.4 | 3.4 | 37 | 1.6 | 1 |
| 37 | 1.5 | 39.8 | 5.5 | 3.6 | 39 | 1.6 | 1 |
| 38 | 1.5 | 40.8 | 5.5 | 3.7 | 40 | 1.6 | 1 |
| 40 | 1.75 | 43.5 | 5.8 | 3.9 | 42.5 | 1.85 | 1.25 |
| 42 | 1.75 | 45.5 | 5.9 | 4.1 | 44.5 | 1.85 | 1.25 |
| 45 | 1.75 | 48.5 | 6.2 | 4.3 | 47.5 | 1.85 | 1.25 |
| 47 | 1.75 | 50.5 | 6.4 | 4.4 | 49.5 | 1.85 | 1.25 |
| 50 | 2 | 54.2 | 6.5 | 4.6 | 53 | 2.15 | 1.5 |
| 52 | 2 | 56.2 | 6.7 | 4.7 | 55 | 2.15 | 1.5 |
| 55 | 2 | 59.2 | 6.8 | 5 | 58 | 2.15 | 1.5 |
| 58 | 2 | 62.2 | 6.9 | 5.2 | 61 | 2.15 | 1.5 |
| 60 | 2 | 64.2 | 7.3 | 5.4 | 63 | 2.15 | 1.5 |
| 62 | 2 | 66.2 | 7.3 | 5.5 | 65 | 2.15 | 1.5 |
| 68 | 2.5 | 72.5 | 7.8 | 6.1 | 71 | 2.65 | 1.5 |
| 72 | 2.5 | 76.5 | 7.8 | 6.4 | 75 | 2.65 | 1.5 |
| 75 | 2.5 | 79.5 | 7.8 | 6.6 | 78 | 2.65 | 1.5 |
| 80 | 2.5 | 85.5 | 8.5 | 7 | 83.5 | 2.65 | 1.75 |
| 85 | 3 | 90.5 | 8.6 | 7.2 | 88.5 | 3.15 | 1.75 |
| 90 | 3 | 95.5 | 8.6 | 7.6 | 93.5 | 3.15 | 1.75 |
| 100 | 3 | 105.5 | 9.2 | 8.4 | 103.5 | 3.15 | 1.75 |
| 110 | 4 | 117 | 10.4 | 9 | 114 | 4.15 | 2 |

## Where the files are

- Maedler: [Retaining rings DIN 472 for boreholes (DIN 472:2017): d1, s, d2, m, d3, a, b, 8 to 110 mm](https://smarthost.maedler.de/datenblaetter/K43_N79_EN.pdf) — web — Publisher's page; dimensions are facts
- Sunhyings: [Retaining rings (circlips) for shafts and bores: example groove table (DIN 472 rows used as a cross-check)](https://sunhyings.com/?p=10628) — web — Publisher's page; dimensions are facts
- McMaster-Carr: [DIN retaining rings (DIN 471 / 472) (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/din-retaining-rings/) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)
- McMaster-Carr: [Retaining rings (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/retaining-rings/) — 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/retaining-rings-din-472-internal/index.json

- groove-gauge-bore-10mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-10mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-10mm-din-472.stl) — Sleeve with a Ø10 bore and the DIN 472 ring groove: groove Ø10.4 (d2) × 1.1 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø16.4; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-12mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-12mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-12mm-din-472.stl) — Sleeve with a Ø12 bore and the DIN 472 ring groove: groove Ø12.5 (d2) × 1.1 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø18.5; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-15mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-15mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-15mm-din-472.stl) — Sleeve with a Ø15 bore and the DIN 472 ring groove: groove Ø15.7 (d2) × 1.1 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø21.7; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-17mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-17mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-17mm-din-472.stl) — Sleeve with a Ø17 bore and the DIN 472 ring groove: groove Ø17.8 (d2) × 1.1 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø23.8; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-20mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-20mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-20mm-din-472.stl) — Sleeve with a Ø20 bore and the DIN 472 ring groove: groove Ø21 (d2) × 1.1 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø27; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-25mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-25mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-25mm-din-472.stl) — Sleeve with a Ø25 bore and the DIN 472 ring groove: groove Ø26.2 (d2) × 1.3 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø32.2; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-30mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-30mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-30mm-din-472.stl) — Sleeve with a Ø30 bore and the DIN 472 ring groove: groove Ø31.4 (d2) × 1.3 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø37.4; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-35mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-35mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-35mm-din-472.stl) — Sleeve with a Ø35 bore and the DIN 472 ring groove: groove Ø37 (d2) × 1.6 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø43; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-40mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-40mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-40mm-din-472.stl) — Sleeve with a Ø40 bore and the DIN 472 ring groove: groove Ø42.5 (d2) × 1.85 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø48.5; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-50mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-50mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-50mm-din-472.stl) — Sleeve with a Ø50 bore and the DIN 472 ring groove: groove Ø53 (d2) × 2.15 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø59; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's
- groove-gauge-bore-62mm-din-472: [STEP](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-62mm-din-472.step) · [STL](https://xemstudio.com/files/hardware/retaining-rings-din-472-internal/groove-gauge-bore-62mm-din-472.stl) — Sleeve with a Ø62 bore and the DIN 472 ring groove: groove Ø65 (d2) × 2.15 mm wide (m), 16 mm long, groove centre 6 mm from the top, outside Ø71; nominal values; the outside diameter, length and groove position are an example, d1, d2 and m are the standard's

## Questions

**What groove does a 22 mm bore DIN 472 ring need?**

Groove diameter 23.0 mm, 1.1 mm wide (depth 0.5 mm); the ring is 1.0 mm thick with a 23.5 mm free outside diameter.

**How wide is a DIN 472 groove?**

The ring thickness plus 0.1 mm for rings up to 1.75 mm (1.1 for 1.0, 1.3 for 1.2, 1.6 for 1.5) and plus 0.15 mm from 2.0 mm rings (2.15, 2.65, 3.15, 4.15).

**Which bearing OD needs a DIN 472 ring?**

Any bore size in the table; for a 22 mm bore (608 outside diameter) the groove is Ø23.0 × 1.1.

## Fits with

- [Retaining rings DIN 471 (external, for shafts): ring dimensions and groove diameter d2 × width m, 3 to 100 mm](https://xemstudio.com/objects/retaining-rings-din-471-external/)
- [Metric shafts Ø3 to Ø10 with D-flats and clip grooves](https://xemstudio.com/objects/metric-shafts/)
- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/)
- [Deep-groove ball bearings, series 60, 62, 63, 68 and 69: 6000 to 6310 (ISO 15)](https://xemstudio.com/objects/deep-groove-ball-bearings-series/)
- [608 ball bearing](https://xemstudio.com/objects/608-bearing/)
- [Pillow block KP08 envelope with a 608 pocket](https://xemstudio.com/objects/pillow-block-kp08/)