DIN 472 circlip for bores: dimensions and groove sizes
Internal circlip for bores, regular series, for bore diameters from 8 to 100 mm. The table gives the ring and the groove it sits in; pick a size to download its CAD files.
DIN 472 dimensions: internal circlip size chart
| Bore d1 | smm | d3mm | amax, mm | bapprox, mm | d5min, mm | d2groove, mm | mgroove, mm | nmin, mm |
|---|---|---|---|---|---|---|---|---|
| 8 | 0.8 | 8.7 | 2.4 | 1.1 | 1 | 8.4 | 0.9 | 0.6 |
| 9 | 0.8 | 9.8 | 2.5 | 1.3 | 1 | 9.4 | 0.9 | 0.6 |
| 10 | 1 | 10.8 | 3.2 | 1.4 | 1.2 | 10.4 | 1.1 | 0.6 |
| 11 | 1 | 11.8 | 3.3 | 1.5 | 1.2 | 11.4 | 1.1 | 0.6 |
| 12 | 1 | 13 | 3.4 | 1.7 | 1.5 | 12.5 | 1.1 | 0.8 |
| 13 | 1 | 14.1 | 3.6 | 1.8 | 1.5 | 13.6 | 1.1 | 0.9 |
| 14 | 1 | 15.1 | 3.7 | 1.9 | 1.7 | 14.6 | 1.1 | 0.9 |
| 15 | 1 | 16.2 | 3.7 | 2 | 1.7 | 15.7 | 1.1 | 1.1 |
| 16 | 1 | 17.3 | 3.8 | 2 | 1.7 | 16.8 | 1.1 | 1.2 |
| 17 | 1 | 18.3 | 3.9 | 2.1 | 1.7 | 17.8 | 1.1 | 1.2 |
| 18 | 1 | 19.5 | 4.1 | 2.2 | 2 | 19 | 1.1 | 1.5 |
| 19 | 1 | 20.5 | 4.1 | 2.2 | 2 | 20 | 1.1 | 1.5 |
| 20 | 1 | 21.5 | 4.2 | 2.3 | 2 | 21 | 1.1 | 1.5 |
| 21 | 1 | 22.5 | 4.2 | 2.4 | 2 | 22 | 1.1 | 1.5 |
| 22 | 1 | 23.5 | 4.2 | 2.5 | 2 | 23 | 1.1 | 1.5 |
| 24 | 1.2 | 25.9 | 4.4 | 2.6 | 2 | 25.2 | 1.3 | 1.8 |
| 25 | 1.2 | 26.9 | 4.5 | 2.7 | 2 | 26.2 | 1.3 | 1.8 |
| 26 | 1.2 | 27.9 | 4.7 | 2.8 | 2 | 27.2 | 1.3 | 1.8 |
| 28 | 1.2 | 30.1 | 4.8 | 2.9 | 2 | 29.4 | 1.3 | 2.1 |
| 30 | 1.2 | 32.1 | 4.8 | 3 | 2 | 31.4 | 1.3 | 2.1 |
| 31 | 1.2 | 33.4 | 5.2 | 3.2 | 2.5 | 32.7 | 1.3 | 2.6 |
| 32 | 1.2 | 34.4 | 5.4 | 3.2 | 2.5 | 33.7 | 1.3 | 2.6 |
| 34 | 1.5 | 36.5 | 5.4 | 3.3 | 2.5 | 35.7 | 1.6 | 2.6 |
| 35 | 1.5 | 37.8 | 5.4 | 3.4 | 2.5 | 37 | 1.6 | 3 |
| 36 | 1.5 | 38.8 | 5.4 | 3.5 | 2.5 | 38 | 1.6 | 3 |
| 37 | 1.5 | 39.8 | 5.5 | 3.6 | 2.5 | 39 | 1.6 | 3 |
| 38 | 1.5 | 40.8 | 5.5 | 3.7 | 2.5 | 40 | 1.6 | 3 |
| 40 | 1.75 | 43.5 | 5.8 | 3.9 | 2.5 | 42.5 | 1.85 | 3.8 |
| 42 | 1.75 | 45.5 | 5.9 | 4.1 | 2.5 | 44.5 | 1.85 | 3.8 |
| 45 | 1.75 | 48.5 | 6.2 | 4.3 | 2.5 | 47.5 | 1.85 | 3.8 |
| 47 | 1.75 | 50.5 | 6.4 | 4.4 | 2.5 | 49.5 | 1.85 | 3.8 |
| 48 | 1.75 | 51.5 | 6.4 | 4.5 | 2.5 | 50.5 | 1.85 | 3.8 |
| 50 | 2 | 54.2 | 6.5 | 4.6 | 2.5 | 53 | 2.15 | 4.5 |
| 52 | 2 | 56.2 | 6.7 | 4.7 | 2.5 | 55 | 2.15 | 4.5 |
| 55 | 2 | 59.2 | 6.8 | 5 | 2.5 | 58 | 2.15 | 4.5 |
| 56 | 2 | 60.2 | 6.8 | 5.1 | 2.5 | 59 | 2.15 | 4.5 |
| 58 | 2 | 62.2 | 6.9 | 5.2 | 2.5 | 61 | 2.15 | 4.5 |
| 60 | 2 | 64.2 | 7.3 | 5.4 | 2.5 | 63 | 2.15 | 4.5 |
| 62 | 2 | 66.2 | 7.3 | 5.5 | 2.5 | 65 | 2.15 | 4.5 |
| 63 | 2 | 67.2 | 7.3 | 5.6 | 2.5 | 66 | 2.15 | 4.5 |
| 65 | 2.5 | 69.2 | 7.6 | 5.8 | 3 | 68 | 2.65 | 4.5 |
| 68 | 2.5 | 72.5 | 7.8 | 6.1 | 3 | 71 | 2.65 | 4.5 |
| 70 | 2.5 | 74.5 | 7.8 | 6.2 | 3 | 73 | 2.65 | 4.5 |
| 72 | 2.5 | 76.5 | 7.8 | 6.4 | 3 | 75 | 2.65 | 4.5 |
| 75 | 2.5 | 79.5 | 7.8 | 6.6 | 3 | 78 | 2.65 | 4.5 |
| 78 | 2.5 | 82.5 | 8.5 | 6.8 | 3 | 81 | 2.65 | 4.5 |
| 80 | 2.5 | 85.5 | 8.5 | 7 | 3 | 83.5 | 2.65 | 5.3 |
| 82 | 2.5 | 87.5 | 8.5 | 7 | 3 | 85.5 | 2.65 | 5.3 |
| 85 | 3 | 90.5 | 8.6 | 7.2 | 3.5 | 88.5 | 3.15 | 5.3 |
| 88 | 3 | 93.5 | 8.6 | 7.4 | 3.5 | 91.5 | 3.15 | 5.3 |
| 90 | 3 | 95.5 | 8.6 | 7.6 | 3.5 | 93.5 | 3.15 | 5.3 |
| 92 | 3 | 97.5 | 8.7 | 7.8 | 3.5 | 95.5 | 3.15 | 5.3 |
| 95 | 3 | 100.5 | 8.8 | 8.1 | 3.5 | 98.5 | 3.15 | 5.3 |
| 98 | 3 | 103.5 | 9 | 8.3 | 3.5 | 101.5 | 3.15 | 5.3 |
| 100 | 3 | 105.5 | 9.2 | 8.4 | 3.5 | 103.5 | 3.15 | 5.3 |
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
DIN 472 circlip and groove dimensions
The size is the bore diameter d1. The free outer diameter d3 is larger than the groove diameter d2, so the ring presses outwards into the groove. The lugs, with their holes d5 for the pliers, point inwards. The groove is cut above the bore diameter, with width m, and the minimum distance n from the groove to the end of the bore is the material that has to stay behind the ring.
The CAD files show the ring in its free state. The shape of the opening and the narrowing towards the lugs are drawn to look right but are not dimensioned by the standard tables.
Internal circlip DIN 472 and its shaft counterpart
DIN 472 is the ring for a bore, such as the housing of a bearing. On the shaft side the matching ring is DIN 471. The circlip size chart lists both, so you can size the shaft groove and the housing groove of the same assembly in one place.
DIN 472 circlips: common questions
- What are the dimensions of a 47 mm internal circlip?
- A DIN 472 circlip size 47 is 1.75 mm thick and measures 50.5 mm across before fitting. It sits in a groove of 49.5 mm diameter and 1.85 mm width.
- How do I fit an internal circlip?
- With internal circlip pliers in the two lug holes: closing the pliers squeezes the ring so it passes into the bore, and releasing it lets the ring open into the groove. Check that it sits fully in the groove all the way round.
- What is the difference between DIN 471 and DIN 472?
- DIN 471 rings go on shafts and grip an outer groove; DIN 472 rings go in bores and press into an inner groove. The lugs point outwards on DIN 471 and inwards on DIN 472.