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Printable tri-clamp (45°): racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach

Name: Printable tri-clamp (45°): racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What is a tri-clamp racking arm (3D printable)? · Hardware · basis: Xem Studio design: a 1½ in clamp body with a sealed bore for ½ in tube (two O-rings), and a bent arm that turns inside the vessel; printable 45° back cone

Also called: tri clamp racking arm printable, 1.5 racking arm printable, rotating racking arm stl printable, 3d printed tri clamp, 3d printable tri clamp, tri clamp stl, printable tri clover

Exact dimensions. True size, with no printing tolerance added.

sizes: 3 in table

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.
Turn the arm down to draw from the bottom, up to rack clear beer off the yeast. Fits a 1½ in side port on a fermenter.
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.

Printable tri-clamp (45°): racking arm: 1½ in clamp body and ½ in… size chart

reach (in)	reach (mm)	tube od (mm)	o rings
2	50.8	12.7	AS568-012 × 2
4	101.6	12.7	AS568-012 × 2
6	152.4	12.7	AS568-012 × 2

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

GW Kent	Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness	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)	PDF	maker chart; dimensions are facts verify

Free files

★ Free files 4 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

racking-arm-body-1.5in-45	1½ in clamp body: Ø24 boss 40 long, Ø12.8 bore with two AS568-012 O-ring grooves for ½ in tube — printable, 45° rims	STEP · STL
racking-arm-tube-2in-45	½ in (Ø12.7 × 1.6) arm: 60 straight through the body, 90° bend on R25, 2 in reach — printable, 45° rims	STEP · STL
racking-arm-tube-4in-45	½ in (Ø12.7 × 1.6) arm: 60 straight through the body, 90° bend on R25, 4 in reach — printable, 45° rims	STEP · STL
racking-arm-tube-6in-45	½ in (Ø12.7 × 1.6) arm: 60 straight through the body, 90° bend on R25, 6 in reach — printable, 45° rims	STEP · STL

Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.

Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=printable-tri-clamp-racking-arms

Printable tri-clamp (45°): racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach, isometric render of a generated part — Render of racking-arm-tube-4in-45 from the free STEP; not to scale.

Fits with

Free

Tri-clamp racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach, isometric render of a generated part

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Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in, isometric render of a generated part

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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 seals the arm?

Two AS568-012 O-rings in the body bore; the arm turns in them.