3030-Lite T-slot extrusion, 3 × 3 in (15-series inch, lite) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/3030-lite-t-slot-extrusion-inch/ (CC BY 4.0) Basis: 80/20 Inc. 15 series Lite (1.5 in), from 80/20's dimensioned drawing of this profile; every slot, lip, cavity, bore and outline number is the drawing's Catalog version: 2026-10-20 Overall (mm): width 76.2, height 76.2 - 3030-Lite T-slot extrusion, 3 × 3 in (15-series inch, lite): 3 × 3 in, 8 slots on a 1.500 in = 38.100 mm pitch (80/20 Inc. 15 series Lite (1.5 in)). Source: 80/20's dimensioned drawing of this profile. 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 0.320 in = 8.128 mm, lip 0.160 in = 4.064 mm thick at the opening under a 2° drop-lock slope (0.169 in = 4.281 mm at the cavity wall), cavity 0.810 in = 20.574 mm wide under the lips, 0.484 in = 12.294 mm from the face to the cavity floor. Centre bore Ø0.262 in = 6.655 mm per cell (the largest thread whose tap drill fits inside: 5/16-18, 6.53 mm). - Cavity side walls: the cavity is 0.810 in = 20.574 mm wide under the lips, then follows the diagonal webs (0.120 in = 3.048 mm thick, stated) down to the floor; the webs lie on the cell diagonals (45°), as drawn. - 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 closed corner pockets of the Lite profile are not dimensioned, so they are drawn filled. - 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 3 × 3 in with no allowance, so open the pocket by your process's socket fit (see Mating features). - Attachments: the 1.5 in 15-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 3 × 3 in drawing slot pitch 1.500 in = 38.100 mm drawing slot opening 0.320 in = 8.128 mm drawing lip thickness at the opening 0.160 in = 4.064 mm drawing lip underside slope (drop lock) 2° maker's page cavity width under the lips 0.810 in = 20.574 mm drawing face to cavity floor 0.484 in = 12.294 mm drawing cavity depth under the lip (at the cavity wall) 0.315 in = 8.012 mm drawing core between opposite floors 0.532 in = 13.513 mm pitch − 2 × face-to-floor (drawing: 0.531 in) diagonal web 0.120 in = 3.048 mm drawing centre bore Ø0.262 in = 6.655 mm × 4 drawing cross-section area 2.763 in² (1783 mm²) maker's page weight 0.2786 lb/in (3.343 lb/ft; 4.98 kg/m) maker's page (ft and kg/m converted) Ix / Iy 2.6959 / 2.6959 in⁴ maker's page area of this model's section 4318.0 mm² (6.693 in²) computed from the DXF Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 80/20 Inc.: 3030-Lite: 3.00 x 3.00 lite T-slotted profile, eight 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/3030-lite.html - 80/20 Inc.: 3030-Lite dimensioned cross-section drawing — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/3/0/3030-lite_dimensional.png Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/3030-lite-t-slot-extrusion-inch/index.json API: https://xemstudio.com/api/geometry?object=3030-lite-t-slot-extrusion-inch