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Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in

Name: Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What clamp fits a 45° printable tri-clamp? · Hardware · basis: Xem Studio design: the two-bolt clamp on this site with its groove walls at 45° to match the 45° rims; contact after 0.4 mm of travel per half, 0.6 mm squeeze

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

sizes: 8 in table

Notes

One clamp per flange size: ½–¾ in (25.0), 1–1½ in (50.5), 2, 2½, 3, 4, 6 and 8 in.
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

clamp	flange_mm	clamp_od_mm	width_mm	bolts
½–¾	25.0	34.0	16.4	2 × M5 (12.9) or drill Ø6.6 for M6
1–1½	50.5	59.5	22.8	2 × M5 (12.9) or drill Ø6.6 for M6
2	64.0	73.0	23.6	2 × M5 (12.9) or drill Ø6.6 for M6
2½	77.5	86.5	24.4	2 × M5 (12.9) or drill Ø6.6 for M6
3	91.0	100.0	25.2	2 × M5 (12.9) or drill Ø6.6 for M6
4	119.0	128.0	27.8	2 × M5 (12.9) or drill Ø6.6 for M6
6	166.9	180.9	27.9	2 × M8
8	217.7	231.7	27.9	2 × M8

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

clamp-half-45-0.75in	½–¾ in two-bolt clamp half for 45° rims (two per joint), M5	STEP · STL
clamp-half-45-1.5in	1–1½ in two-bolt clamp half for 45° rims (two per joint), M5	STEP · STL
clamp-half-45-2in	2 in two-bolt clamp half for 45° rims (two per joint), M5	STEP · STL
clamp-half-45-2.5in	2½ in two-bolt clamp half for 45° rims (two per joint), M5	STEP · STL
clamp-half-45-3in	3 in two-bolt clamp half for 45° rims (two per joint), M5	STEP · STL
clamp-half-45-4in	4 in two-bolt clamp half for 45° rims (two per joint), M5	STEP · STL
clamp-half-45-6in-m8	6 in two-bolt clamp half for 45° rims (two per joint), M8	STEP · STL
clamp-half-45-8in-m8	8 in two-bolt clamp half for 45° rims (two per joint), M8	STEP · STL