# Metric shafts Ø3 to Ø10 with D-flats and clip grooves

> What does a 5 mm or 8 mm shaft with a D-flat and clip grooves look like dimensionally?

- Category: Hardware › Motion
- Kind: Hardware
- Basis: Round shafts at nominal Ø; D-flat 0.1 × d deep over 20 mm at one end; DIN 6799 and DIN 471 groove sizes
- Page: https://xemstudio.com/objects/metric-shafts/ · JSON: https://xemstudio.com/api/geometry?object=metric-shafts · Plain text: https://xemstudio.com/objects/metric-shafts/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**Exact dimensions.** Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part.

## Notes

- Round shafts at nominal Ø with 0.5 × 45° chamfers on both ends: Ø3 × 100, Ø4 × 100, Ø5 × 100 and × 200, Ø6 × 150, Ø8 × 200 and × 300, Ø10 × 200.
- The Ø5, Ø6 and Ø8 shafts carry a D-flat 0.1 × d deep and 20 mm long at one end: 4.5, 5.4 and 7.2 across the flat. A set screw seats on it.
- shaft-8x100-grooved: Ø8 × 100 with DIN 471 circlip grooves Ø7.6 × 0.9 starting 10 and 88 mm from the end, and the 20 mm D-flat. shaft-5x80-grooved: Ø5 × 80 with DIN 6799 E-clip grooves Ø4.0 × 0.7 at 8 and 70 mm, and the D-flat.
- For the full-length D-flat crankshafts, see the Stirling crankshafts page; these shafts have the short motor-style flat.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| shaft Ø | Ø3 / 4 / 5 / 6 / 8 / 10 | bores of the mating parts | slide | shaft-* |
| D-flat | 0.1 d deep × 20 (Ø5 → 4.5 across) | set screw | designed | shaft-* |
| clip grooves | DIN 6799 Ø4.0 × 0.7 / DIN 471 Ø7.6 × 0.9 | E-clip / circlip | designed | shaft-* |

## Sizes

| file | Ø | length | D-flat | grooves |
|---|---|---|---|---|
| shaft-3x100 | 3 | 100 | — | — |
| shaft-4x100 | 4 | 100 | — | — |
| shaft-5x100 | 5 | 100 | 0.5 × 20 (4.5 across) | — |
| shaft-5x200 | 5 | 200 | 0.5 × 20 (4.5 across) | — |
| shaft-6x150 | 6 | 150 | 0.6 × 20 (5.4 across) | — |
| shaft-8x200 | 8 | 200 | 0.8 × 20 (7.2 across) | — |
| shaft-8x300 | 8 | 300 | 0.8 × 20 (7.2 across) | — |
| shaft-10x200 | 10 | 200 | — | — |
| shaft-8x100-grooved | 8 | 100 | 0.8 × 20 | DIN 471 Ø7.6 × 0.9 at 10, 88 |
| shaft-5x80-grooved | 5 | 80 | 0.5 × 20 | DIN 6799 Ø4.0 × 0.7 at 8, 70 |

## Where the files are

- Wikipedia: [Circlip](https://en.wikipedia.org/wiki/Circlip) — web — CC BY-SA 4.0 (text)
- Wikipedia: [Retaining ring](https://en.wikipedia.org/wiki/Retaining_ring) — web — CC BY-SA 4.0 (text)
- McMaster-Carr: [Shaft collars (free STEP per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/shaft-collars/) — STEP, PDF — McMaster-Carr site terms (verify at link)
- McMaster-Carr: [Retaining rings (free STEP per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/retaining-rings/) — STEP, PDF — McMaster-Carr site terms (verify at link)
- Long Earth Society: [Engine and rig builds](https://longearthsociety.com/engineering/) — web, video — LES site

## Free STEP/STL (10 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/metric-shafts/index.json

- shaft-3x100: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-3x100.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-3x100.stl) — precision shaft Ø3 × 100
- shaft-4x100: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-4x100.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-4x100.stl) — precision shaft Ø4 × 100
- shaft-5x100: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x100.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x100.stl) — precision shaft Ø5 × 100 with a 20 mm D-flat, 0.5 deep (4.5 across the flat)
- shaft-5x200: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x200.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x200.stl) — precision shaft Ø5 × 200 with a 20 mm D-flat, 0.5 deep (4.5 across the flat)
- shaft-6x150: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-6x150.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-6x150.stl) — precision shaft Ø6 × 150 with a 20 mm D-flat, 0.6 deep (5.4 across the flat)
- shaft-8x200: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x200.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x200.stl) — precision shaft Ø8 × 200 with a 20 mm D-flat, 0.8 deep (7.2 across the flat)
- shaft-8x300: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x300.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x300.stl) — precision shaft Ø8 × 300 with a 20 mm D-flat, 0.8 deep (7.2 across the flat)
- shaft-10x200: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-10x200.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-10x200.stl) — precision shaft Ø10 × 200
- shaft-8x100-grooved: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x100-grooved.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-8x100-grooved.stl) — Ø8 × 100 with DIN 471 circlip grooves (Ø7.6 × 0.9) at 10 and 88 mm and a 20 mm D-flat, 0.8 deep
- shaft-5x80-grooved: [STEP](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x80-grooved.step) · [STL](https://xemstudio.com/files/hardware/shaft-collars-clips-and-shafts/shaft-5x80-grooved.stl) — Ø5 × 80 with DIN 6799 E-clip grooves (Ø4.0 × 0.7) at 8 and 70 mm and a 20 mm D-flat, 0.5 deep

## How it fits

### Parts that fit it
- [Ratchet wheels Ø40 with 12, 24 and 36 teeth](https://xemstudio.com/objects/ratchet-wheels/): Ø5 shaft in the bore
- [Pillow block KP08 envelope with a 608 pocket](https://xemstudio.com/objects/pillow-block-kp08/): Ø8 shaft through the 608
- [Flange block KFL08 envelope with a 608 pocket](https://xemstudio.com/objects/flange-block-kfl08/): Ø8 shaft through the 608
- [Plain sleeve bushings Ø3 to Ø10 ID](https://xemstudio.com/objects/sleeve-bushings/): shaft of the ID turns in it
- [Universal joint for Ø5 shafts: Ø14 yokes and 8 mm cross spider](https://xemstudio.com/objects/universal-joint-5mm/): Ø5 shaft in the yoke bore
- [Compression springs, wire Ø0.5–1.6, OD 6–16](https://xemstudio.com/objects/compression-springs/): guide rod at the spring ID
- [Axial-flux rotor plates: Ø90 with 12 magnets (Ø8 bore), Ø70 with 8 magnets (Ø5 bore)](https://xemstudio.com/objects/axial-flux-rotor/): Ø8 / Ø5 bore on the shaft, M3 grub
- [Optical encoder disc Ø60, 30 slots, Ø5 bore](https://xemstudio.com/objects/encoder-disc/): Ø5 bore on a Ø5 shaft (slide)
- [Swash (wobble) plates Ø40 at 10, 15 and 20°](https://xemstudio.com/objects/swash-plate-40mm/): Ø5 shaft, M3 grub
- [Eccentric sheaves Ø30 at 3, 5 and 8 mm offset](https://xemstudio.com/objects/eccentric-sheaves/): Ø5 shaft, M3 grub

### Goes in or on
- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/): 623 / 625 / 608 bores of Ø3 / Ø5 / Ø8

### Connects to
- [External circlips DIN 471 for Ø4 to Ø20 shafts](https://xemstudio.com/objects/circlips-din-471/): circlip in the Ø7.6 × 0.9 groove
- [E-clips DIN 6799 for Ø2 to Ø10 shafts](https://xemstudio.com/objects/e-clips-din-6799/): E-clip in the Ø4.0 × 0.7 groove

### Alternatives
- [Crankshafts Ø3, Ø5 and Ø8 with full-length D-flat](https://xemstudio.com/objects/stirling-crankshafts/): full-length D-flat shafts

### Also needed
- [Set-screw shaft collars Ø3 to Ø12](https://xemstudio.com/objects/shaft-collars/): locates the shaft axially

## Questions

**How deep is a D-flat on a 5 mm shaft?**

0.5 mm (4.5 across the flat), 20 mm long at one end on these files.

**Where are the grooves on the grooved 8 mm shaft?**

DIN 471 circlip grooves Ø7.6 × 0.9 at 10 and 88 mm from the end of the Ø8 × 100 shaft.

## Fits with

- [Set-screw shaft collars Ø3 to Ø12](https://xemstudio.com/objects/shaft-collars/)
- [E-clips DIN 6799 for Ø2 to Ø10 shafts](https://xemstudio.com/objects/e-clips-din-6799/)
- [External circlips DIN 471 for Ø4 to Ø20 shafts](https://xemstudio.com/objects/circlips-din-471/)
- [Crankshafts Ø3, Ø5 and Ø8 with full-length D-flat](https://xemstudio.com/objects/stirling-crankshafts/)
- [Linear rod Ø8 × 300](https://xemstudio.com/objects/linear-rod-8mm/)
- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/)