# Printable tri-clamp (45°): in-line sight glasses: 1½ to 4 in, 2, 4 and 6 in glass

> How is a tri-clamp sight glass built (3D printable)?

- Category: Hardware › Printable tri-clamp
- Kind: Hardware
- Basis: Xem Studio design: two clamp-face end pieces hold a glass tube (bore = the line bore) in counterbores on flat gaskets, pulled together by four M5 tie rods; printable 45° back cone
- Page: https://xemstudio.com/objects/printable-tri-clamp-sight-glasses/ · JSON: https://xemstudio.com/api/geometry?object=printable-tri-clamp-sight-glasses · Plain text: https://xemstudio.com/objects/printable-tri-clamp-sight-glasses/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- 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

- 3D-printable tri-clamp: this is Xem Studio's print-friendly version of the standard sanitary fitting, drawn so it prints on an ordinary FDM or resin printer with no supports. Download the STL to print it, or the STEP to edit it. The files are true size (no printing allowance): add your own clearance in the slicer or CAD if your printer needs it.
- A full-bore window in a line or on a vessel outlet: see the wort run off, the level or the colour. Glass tube: bore = the line bore, wall 3 (1½ and 2 in) or 4 (3 and 4 in). Face to face = two end pieces less the seats plus the glass.
- Printable tri-clamp: the ISO 2852 face and gasket groove are exactly standard, only the back cone behind each rim is 45° instead of 20°, so no rim overhangs more than 45° from vertical in any print orientation. Join these with the 45° clamps (printable-tri-clamp-clamps) and standard Type B gaskets; a 45° clamp fits only 45° rims, so keep a run all 45°. A 45° cone turns clamp force into face force at 1 : 1 (a 20° cone at 2.7 : 1), so tighten the clamp bolts harder or use M6.
- Print orientation: straight parts face down; elbows, tees and crosses with one face down; horizontal bores bridge their top, so keep them small or add a light tree support inside.
- Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40.

## Sizes

| size_in | glass_in | glass_od_mm | glass_id_mm | face_to_face_mm | tie_rods |
|---|---|---|---|---|---|
| 1.5 | 2 | 40.8 | 34.8 | 98.8 | 4 × M5 × 111 |
| 1.5 | 4 | 40.8 | 34.8 | 149.6 | 4 × M5 × 162 |
| 1.5 | 6 | 40.8 | 34.8 | 200.4 | 4 × M5 × 212 |
| 2 | 2 | 53.5 | 47.5 | 98.8 | 4 × M5 × 111 |
| 2 | 4 | 53.5 | 47.5 | 149.6 | 4 × M5 × 162 |
| 2 | 6 | 53.5 | 47.5 | 200.4 | 4 × M5 × 212 |
| 3 | 2 | 80.9 | 72.9 | 98.8 | 4 × M5 × 111 |
| 3 | 4 | 80.9 | 72.9 | 149.6 | 4 × M5 × 162 |
| 3 | 6 | 80.9 | 72.9 | 200.4 | 4 × M5 × 212 |
| 4 | 2 | 105.4 | 97.4 | 98.8 | 4 × M5 × 111 |
| 4 | 4 | 105.4 | 97.4 | 149.6 | 4 × M5 × 162 |
| 4 | 6 | 105.4 | 97.4 | 200.4 | 4 × M5 × 212 |

## Where the files are

- GW Kent: [Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness](https://www.gwkent.com/triclamp-guide) — web — publisher's guide; dimensions cited
- Rubber Fab: [Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)](https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf) — PDF — maker chart; dimensions are facts (verify at link)

## Free STEP/STL (20 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/index.json

- sight-glass-end-1.5in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-1.5in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-1.5in-45.stl) — 1.5 in sight-glass end piece (two per sight glass): clamp face, Ø64.8 body 30.0 long, glass seat Ø40.8 × 6.0, four Ø5.5 tie-rod holes on r 26.4 — printable, 45° rims
- sight-glass-tube-1.5in-2in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-1.5in-2in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-1.5in-2in-45.stl) — 1.5 in glass tube Ø40.8 × Ø34.8 × 50.8: sight glass 98.8 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-1.5in-4in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-1.5in-4in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-1.5in-4in-45.stl) — 1.5 in glass tube Ø40.8 × Ø34.8 × 101.6: sight glass 149.6 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-1.5in-6in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-1.5in-6in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-1.5in-6in-45.stl) — 1.5 in glass tube Ø40.8 × Ø34.8 × 152.4: sight glass 200.4 face to face with two end pieces — printable, 45° rims
- sight-glass-seat-gasket-1.5in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-1.5in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-1.5in-45.stl) — 1.5 in flat seat gasket Ø40.8 × Ø34.8 × 1.5, one in each end seat — printable, 45° rims
- sight-glass-end-2in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-2in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-2in-45.stl) — 2 in sight-glass end piece (two per sight glass): clamp face, Ø77.5 body 30.0 long, glass seat Ø53.5 × 6.0, four Ø5.5 tie-rod holes on r 32.8 — printable, 45° rims
- sight-glass-tube-2in-2in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-2in-2in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-2in-2in-45.stl) — 2 in glass tube Ø53.5 × Ø47.5 × 50.8: sight glass 98.8 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-2in-4in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-2in-4in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-2in-4in-45.stl) — 2 in glass tube Ø53.5 × Ø47.5 × 101.6: sight glass 149.6 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-2in-6in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-2in-6in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-2in-6in-45.stl) — 2 in glass tube Ø53.5 × Ø47.5 × 152.4: sight glass 200.4 face to face with two end pieces — printable, 45° rims
- sight-glass-seat-gasket-2in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-2in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-2in-45.stl) — 2 in flat seat gasket Ø53.5 × Ø47.5 × 1.5, one in each end seat — printable, 45° rims
- sight-glass-end-3in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-3in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-3in-45.stl) — 3 in sight-glass end piece (two per sight glass): clamp face, Ø104.9 body 30.0 long, glass seat Ø80.9 × 6.0, four Ø5.5 tie-rod holes on r 46.5 — printable, 45° rims
- sight-glass-tube-3in-2in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-3in-2in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-3in-2in-45.stl) — 3 in glass tube Ø80.9 × Ø72.9 × 50.8: sight glass 98.8 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-3in-4in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-3in-4in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-3in-4in-45.stl) — 3 in glass tube Ø80.9 × Ø72.9 × 101.6: sight glass 149.6 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-3in-6in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-3in-6in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-3in-6in-45.stl) — 3 in glass tube Ø80.9 × Ø72.9 × 152.4: sight glass 200.4 face to face with two end pieces — printable, 45° rims
- sight-glass-seat-gasket-3in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-3in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-3in-45.stl) — 3 in flat seat gasket Ø80.9 × Ø72.9 × 1.5, one in each end seat — printable, 45° rims
- sight-glass-end-4in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-4in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-end-4in-45.stl) — 4 in sight-glass end piece (two per sight glass): clamp face, Ø129.4 body 30.0 long, glass seat Ø105.4 × 6.0, four Ø5.5 tie-rod holes on r 58.7 — printable, 45° rims
- sight-glass-tube-4in-2in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-4in-2in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-4in-2in-45.stl) — 4 in glass tube Ø105.4 × Ø97.4 × 50.8: sight glass 98.8 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-4in-4in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-4in-4in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-4in-4in-45.stl) — 4 in glass tube Ø105.4 × Ø97.4 × 101.6: sight glass 149.6 face to face with two end pieces — printable, 45° rims
- sight-glass-tube-4in-6in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-4in-6in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-tube-4in-6in-45.stl) — 4 in glass tube Ø105.4 × Ø97.4 × 152.4: sight glass 200.4 face to face with two end pieces — printable, 45° rims
- sight-glass-seat-gasket-4in-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-4in-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-sight-glasses/sight-glass-seat-gasket-4in-45.stl) — 4 in flat seat gasket Ø105.4 × Ø97.4 × 1.5, one in each end seat — printable, 45° rims

## Questions

**Can I 3D print this?**

Yes. It is the 3D-printable version: every overhang is 45° or steeper, so it prints without supports, and the sealing face is standard ISO 2852, so a normal gasket and clamp fit.

**What holds the glass?**

Each end piece's counterbore with a flat gasket; four M5 rods squeeze the two ends onto the glass.

## Fits with

- [Tri-clamp in-line sight glasses: 1½ to 4 in, 2, 4 and 6 in glass](https://xemstudio.com/objects/tri-clamp-sight-glasses/)
- [Tri-clamp end caps with ports: NPT, clamp nozzle, hose barb and airlock hole, 1½ to 8 in](https://xemstudio.com/objects/tri-clamp-ported-end-caps/)
- [Tri-clamp × hose barb adapters (14MPHR style): ½ to 4 in clamp, ¼ to 4 in hose](https://xemstudio.com/objects/tri-clamp-hose-barb-adapters/)
- [Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in](https://xemstudio.com/objects/printable-tri-clamp-clamps/)