This interactive guide walks through assembling the IKEA BILLY bookcase, 80 × 28 × 202 cm, built directly from IKEA's own assembly manual (AA-1823127-9). The 3D build follows the manual step by step, using the same parts, hardware counts and order as the printed drawings.
The bookcase is made from two sides, a top, a bottom, a fixed middle shelf, a plinth, four loose shelves and a back panel folded in three. It uses 82 pieces of hardware, including 16 wooden dowels, 12 cam screws, 12 cam locks, 18 nails, 16 shelf pins, and 2 wall brackets with 2 screws and 4 washers. A running count tracks each item as it is installed.
BILLY holds together with cam locks. A cam screw is inserted into the side panel, and when the board is attached, its head drops into a round cup called the cam. Turning the cam half a turn clockwise pulls the two panels tight. The dowels align the pieces, while the cams do the clamping. The nailed-on back panel keeps the case square.
Users can step through the build with arrows or a timeline, or play the full assembly. The manual can be viewed alongside the build, and any drawing can be clicked to jump to its matching step. The guide also includes the simpler LACK side table (55 × 55 × 45 cm), built from its own manual (AA-2606170-1) with four double-ended screws and four legs.
The parts, counts, order and hardware numbers match the manual. Board sizes are based on the published dimensions, while panel thickness, hole positions and shelf heights are estimated from the drawings. The 3D animation runs faster than real assembly, and the manual calls for two people whenever the case is lifted or turned. Anchoring the bookcase to the wall is essential to prevent tipping, and wall screws and plugs are not included.
Source: Hacker News · Summarized by HeadlinesBriefing