IKEA – 3D Guide

A browser-based 3D reconstruction builds the BILLY bookcase (80 × 28 × 202 cm) step-by-step from IKEA manual AA-1823127-9, matching pages, part order and hardware counts exactly. The model assembles two sides, top, bottom, fixed middle shelf, plinth, four loose shelves and a three-fold back panel, and tracks 82 hardware items: 16 wooden dowels, 12 cam screws, 12 cam locks, 18 nails, 16 shelf pins, and 2 wall brackets with 2 screws and 4 washers. It demonstrates how cam locks clamp panels (a cam screw sits proud in one panel, its head drops into a cam in the mating panel and a half-turn pulls the boards together) while dowels merely align and the nailed back panel resists racking. Published board dimensions are used; panel thicknesses, hole positions and shelf heights are estimated from the drawings. The simulation runs much faster than real assembly and notes where two people are required to lift or turn the case.

Controls let you step through or play the timeline, open the original manual beside the build, switch to a black-line drawing view, click drawings to jump to steps and click parts to hear names and numbers. A toggle switches to the simpler LACK table (four double-ended screws 115980 and four legs). Safety is emphasized: step 12 fits wall brackets to prevent tipping; wall fixings aren’t included. The manual pages are reproduced unaltered with a link to the original; this reconstruction is not made or endorsed by IKEA.