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Printable tri-clamp (45°): thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top

Name: Printable tri-clamp (45°): thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What thermowell fits a 1½ inch tri-clamp port (3D printable)? · Hardware · basis: Xem Studio design: the standard solid cap with a ⅜ in (9.53) well closed by a round tip, a Ø6.6 bore for a ¼ in (6.35) thermometer or probe stem, and a ½ NPT Class 3000 half coupling on top (tap-drill bore); printable 45° back cone

Also called: tri clamp thermowell printable, 1.5 tri clamp thermowell printable, thermowell for fermenter 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: 10 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.
The temperature stick: clamp it into a port and slide a ¼ in stem thermometer or probe into the well, so the probe never touches the liquid. Insertion is measured from the clamp face to the tip.
Pick the length so the tip sits in the middle of the liquid: in a 6 in × 18 in vessel through the top, 12 in; through a side port, 2½ to 4 in.
Left out because they are taller than a 256 mm printer: thermowell-1.5in-9in, thermowell-1.5in-12in, thermowell-2in-9in, thermowell-2in-12in (the standard page has them).
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°): thermowells: 1½ and 2 in clamp, 2½ to 12… size chart

clamp	insertion (in)	insertion (mm)	well od (mm)	bore (mm)
1–1½	2.5	63.5	9.53	6.6
1–1½	4	101.6	9.53	6.6
1–1½	6	152.4	9.53	6.6
1–1½	9	228.6	9.53	6.6
1–1½	12	304.8	9.53	6.6
2	2.5	63.5	9.53	6.6
2	4	101.6	9.53	6.6
2	6	152.4	9.53	6.6
2	9	228.6	9.53	6.6
2	12	304.8	9.53	6.6

Where the files are

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

ASME	B1.20.1 Pipe threads, general purpose (NPT): major diameter, L2, tap drill; B16.11 forged fittings (Class 3000 couplings); B36.10 Sch 40 bore	standard	ASME; dimensions are facts verify
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 6 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

thermowell-1.5in-2.5in-45	1–1½ in clamp thermowell, 2.5 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top — printable, 45° rims	STEP · STL
thermowell-1.5in-4in-45	1–1½ in clamp thermowell, 4 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top — printable, 45° rims	STEP · STL
thermowell-1.5in-6in-45	1–1½ in clamp thermowell, 6 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top — printable, 45° rims	STEP · STL
thermowell-2in-2.5in-45	2 in clamp thermowell, 2.5 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top — printable, 45° rims	STEP · STL
thermowell-2in-4in-45	2 in clamp thermowell, 4 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top — printable, 45° rims	STEP · STL
thermowell-2in-6in-45	2 in clamp thermowell, 6 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top — 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-thermowells

Printable tri-clamp (45°): thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top, isometric render of a generated part — Render of thermowell-2in-2.5in-45 from the free STEP; not to scale.

Fits with

Free

Tri-clamp thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top, isometric render of a generated part

Tri-clamp thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top10 sizes★ 10 files Free

Tri-clamp dial thermometers (envelope): 3 and 5 in dial, ¼ in stem 2½ to 12 in, 1½ in clamp, isometric render of a generated part

Tri-clamp dial thermometers (envelope): 3 and 5 in dial, ¼ in stem 2½ to 12 in, 1½ in clamp10 sizes★ 10 files Free

Tri-clamp end caps with ports: NPT, clamp nozzle, hose barb and airlock hole, 1½ to 8 in, isometric render of a generated part

Tri-clamp end caps with ports: NPT, clamp nozzle, hose barb and airlock hole, 1½ to 8 in7 sizes★ 42 files Free

Tri-clamp dome lids: 1½ to 12 in, plain or with a port at the crown, isometric render of a generated part

Tri-clamp dome lids: 1½ to 12 in, plain or with a port at the crown8 sizes★ 16 files Free

Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep, isometric render of a generated part

Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep3 sizes★ 18 files Free

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

Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in8 sizes★ 8 files

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 fits in it?

Any ¼ in (6.35 mm) stem: a bimetal dial thermometer, a thermocouple or an RTD probe.