DIN 472 circlip, 21 mm bore
Circlips › DIN 472-21
A DIN 472-21 is an internal circlip (a bore clip) for a 21 mm bore, 1 mm thick. Cut the groove Ø22 mm, 1.1 mm wide and 0.5 mm deep, and fit it with inside pliers, size J1.
| Bore Ø | 21 mm |
|---|---|
| Clip thickness | 1 mm |
| Groove Ø | 22 mm |
| Groove width | 1.1 mm |
| Groove depth | 0.5 mm |
| Pliers | inside, size J1 |
Sizes from DIN 472, as Benchsmith's Find → Circlip gives them. Groove depth = (bore Ø − groove Ø) ÷ 2.
Open DIN 472-21 in BenchsmithAdd to order list
Bench note · why the groove, not the clip
The clip is named by the bore it fits (Ø21), but you cut the groove: Ø22, 1.1 wide, 0.5 deep. Square corners at the bottom so the clip sits flat against the side.
Bench note · why inside pliers
A bore clip (DIN 472) is squeezed to go in: inside pliers. Squeeze it only as far as it takes; bent past that it springs out under load.
Same Ø, shaft clip
- DIN 471-21shaft Ø21, groove Ø20
One size up or down
- DIN 472-20bore Ø20 (down)
- DIN 472-22bore Ø22 (up)
Clip gone and only the groove left? Measure the bore, or the bottom of the old groove, and type it into Benchsmith → Find → Circlip.