1530 T-slot extrusion, 1.5 × 3 in (15-series inch) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/1530-t-slot-extrusion-inch/ (CC BY 4.0) Basis: 80/20 Inc. 15 series (1.5 in), from 80/20's page for this profile (size, slot count, series, area, weight) and the 1515, 1545, 3030 and 3060 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 76.2, height 38.1 - 1530 T-slot extrusion, 1.5 × 3 in (15-series inch): 1.5 × 3 in, 6 slots on a 1.500 in = 38.100 mm pitch (80/20 Inc. 15 series (1.5 in)). Source: 80/20's page for this profile (size, slot count, series, area, weight) and the 1515, 1545, 3030 and 3060 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 0.320 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 (0.160 in = 4.064 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 1.5 × 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 1.5 × 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 0.160 in = 4.064 mm drawing centre bore Ø0.262 in = 6.655 mm × 2 drawing cross-section area 2.077 in² (1340 mm²) maker's page weight 0.2025 lb/in (2.43 lb/ft; 3.62 kg/m) maker's page (ft and kg/m converted) Ix / Iy 1.8042 / 0.4824 in⁴ maker's page area of this model's section 1873.8 mm² (2.904 in²) computed from the DXF Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 80/20 Inc.: 1530: 1.50 x 3.00 T-slotted profile, six 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/1530.html - 80/20 Inc.: 1515 dimensioned cross-section drawing (same series slot) — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/1/5/1515_dimensional.png - 80/20 Inc.: 1545 dimensioned cross-section drawing (same series slot) — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/1/5/1545_dimensional.png - 80/20 Inc.: 3030 dimensioned cross-section drawing (same series slot) — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/3/0/3030_dimensional.png - 80/20 Inc.: 3060 dimensioned cross-section drawing (same series slot) — image — 80/20 site terms [verify license at link] — https://8020.net/media/catalog/product/3/0/3060_dimensional.png Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/1530-t-slot-extrusion-inch/index.json API: https://xemstudio.com/api/geometry?object=1530-t-slot-extrusion-inch