DIN 6799 dimensions
Groove and ring dimensions for retaining rings for shaft grooves, fitted from the side. The nominal size is the groove diameter — never a dimension of the ring itself.
| Nominal | Groove Ø | Groove width | Thickness | Edge margin | Stocked |
|---|---|---|---|---|---|
| 1.5 | 1.5 | 0.44 | 0.4 | 0.8 | yes |
| 1.9 | 1.9 | 0.54 | 0.5 | 1 | yes |
| 2.3 | 2.3 | 0.64 | 0.6 | 1 | yes |
| 3.2 | 3.2 | 0.64 | 0.6 | 1 | yes |
| 4 | 4 | 0.74 | 0.7 | 1.2 | yes |
| 5 | 5 | 0.74 | 0.7 | 1.2 | yes |
| 6 | 6 | 0.74 | 0.7 | 1.2 | yes |
| 7 | 7 | 0.94 | 0.9 | 1.5 | yes |
| 8 | 8 | 1.05 | 1 | 1.8 | yes |
| 9 | 9 | 1.15 | 1.1 | 2 | yes |
| 10 | 10 | 1.25 | 1.2 | 2 | yes |
All values in millimetres. Tolerances are given in the standard and are not reproduced here.
What this table covers
These are the sizes Springmasters Ltd publish data for, not a reproduction of every designation in DIN 6799. A size missing here means they do not list it; it does not mean the standard omits it. Where you need a size that is not shown, ask the trade desk rather than reading anything into the gap.
Common questions
What is the groove diameter for a 5 mm DIN 6799 ring?
5 mm, with a groove width of 0.74 mm and a ring thickness of 0.7 mm. The full table for every DIN 6799 size is on this page.
Where do these DIN 6799 figures come from?
From Springmasters Ltd — published circlip and retaining ring product data — a single manufacturer specification, not two independent references. Every other table on this site is cross-checked against a second source before it is published; this one is not, and is labelled as such wherever it appears. Check it against your drawing before machining.
What does edge margin mean?
The minimum distance from the groove to the end of the shaft or bore. It is calculated to leave enough material to resist shearing at the ring's full rated load. Cutting a groove closer to the end than the standard allows changes the failure mode to the shaft end shearing away.
Does the nominal size mean the ring diameter?
No. For DIN 6799 the nominal size is the groove diameter the ring fits, not a dimension of the ring itself. Measuring an old ring across its widest point gives a number that appears nowhere in this table.
Sources
Rests on a single manufacturer specification — Springmasters' published product data — rather than on two independent references, which is the standard applied to the other tables here. It is published because the figures are internally consistent in a way that settles the labelling problem that previously kept them off this site, and because the same source agrees with our DIN 471 and DIN 472 references on 43 of 44 cross-checked sizes. Treat it as one manufacturer's data, attributed to them, and check it against your drawing before machining.
Nothing is interpolated. Check against the standard itself, or your drawing, before machining.