2040 T-slot extrusion, 2 × 4 in (10-series inch) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/2040-t-slot-extrusion-inch/ (CC BY 4.0) Basis: 80/20 Inc. 10 series (1 in), from 80/20's page for this profile (size, slot count, series, area, weight) and the 1010 and 1020 drawings of the same series for the slot (the page shows no drawing); every slot, lip, cavity, bore and outline number is the drawing's Catalog version: 2026-10-20 Overall (mm): width 101.6, height 50.8 - 2040 T-slot extrusion, 2 × 4 in (10-series inch): 2 × 4 in, 12 slots on a 1.000 in = 25.400 mm pitch (80/20 Inc. 10 series (1 in)). Source: 80/20's page for this profile (size, slot count, series, area, weight) and the 1010 and 1020 drawings of the same series for the slot (the page shows no drawing). Files: STEP and STL at 100, 1000 mm with square ends, and a DXF of the exact cross-section (mm), the master to extrude to any length. The section is centred on the origin and extruded along +Z from z = 0. - Slot: opening 0.256 in = 6.502 mm, lip 0.087 in = 2.210 mm thick at the opening under a 2° drop-lock slope (0.093 in = 2.355 mm at the cavity wall), cavity 0.584 in = 14.834 mm wide under the lips, 0.323 in = 8.204 mm from the face to the cavity floor. Centre bore Ø0.205 in = 5.207 mm per cell (the largest thread whose tap drill fits inside: 1/4-20, 5.1 mm). - Cavity side walls: the cavity is 0.584 in = 14.834 mm wide under the lips, then follows the diagonal webs (0.087 in = 2.210 mm thick, stated) down to the floor; the webs lie on the cell diagonals (45°), as drawn. The web thickness is the one stated on the same-series drawings named above. - The closed hollows between cells are not fully dimensioned on the drawing, so they are drawn filled: the outline, slots and bores are exact, the bar is heavier than the real one. - The drawing does not dimension the outer corner radii, so the corners are square: a pocket cut from this file clears the real rounded corners. The small alignment grooves on the faces are not dimensioned and are left off (the faces are flat). - Wrapping it: to make a part that fits around the bar, subtract the 1000 mm file (or extrude the DXF) from your solid; the outline is the drawing's 2 × 4 in with no allowance, so open the pocket by your process's socket fit (see Mating features). - Attachments: the 1 in 10-series T-nuts, end caps, feet, brackets, gussets, plates and slot covers are cut from these same numbers; the fit check (tools/asm_extrusion_fit.py) placed each one on this profile with zero overlap. feature size from outline 2 × 4 in drawing slot pitch 1.000 in = 25.400 mm drawing slot opening 0.256 in = 6.502 mm drawing lip thickness at the opening 0.087 in = 2.210 mm drawing lip underside slope (drop lock) 2° maker's page cavity width under the lips 0.584 in = 14.834 mm drawing face to cavity floor 0.323 in = 8.204 mm drawing cavity depth under the lip (at the cavity wall) 0.230 in = 5.849 mm drawing core between opposite floors 0.354 in = 8.992 mm pitch − 2 × face-to-floor (the drawing's own core figure is 0.356 in) diagonal web 0.087 in = 2.210 mm drawing centre bore Ø0.205 in = 5.207 mm × 8 drawing cross-section area 2.29 in² (1477 mm²) maker's page weight 0.2233 lb/in (2.68 lb/ft; 3.99 kg/m) maker's page (ft and kg/m converted) Ix / Iy 3.5168 / 1.0513 in⁴ maker's page area of this model's section 4000.0 mm² (6.200 in²) computed from the DXF Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 80/20 Inc.: 2040: 2.00 x 4.00 T-slotted profile, twelve open T-slots: product page with the cross-section drawing and section properties — web — 80/20 site terms [verify license at link] — https://8020.net/2040.html - 80/20 Inc.: 1010 dimensioned cross-section drawing (same series slot) — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/1/0/1010_dimensional_4.jpg - 80/20 Inc.: 1020 dimensioned cross-section drawing (same series slot) — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/1/0/1020_dimensional.png Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/2040-t-slot-extrusion-inch/index.json API: https://xemstudio.com/api/geometry?object=2040-t-slot-extrusion-inch