IKEA's wedge dowel swaps screws for a threaded peg that snaps into a milled slot

In a January 2017 Fast Company article, Diana Budds writes that IKEA began developing the wedge dowel a few years earlier to make mass-produced furniture sturdier; it was first introduced in 2013. Product development engineer Anna-Karin Sjögren calls it a search for the combination of lightness and strength.

The dowel looks like a wood screw. A custom-built machine mills threads into it, and it snaps into a milled slot with no extra tools or screws. On the Lisabo table, you slot four wood legs into place and screw in a metal stabilizer, so the whole design needs only four screws.

According to IKEA's estimates, furniture using it takes 50% to 80% less time to assemble than pieces with typical IKEA joinery, and it can be disassembled easily and quickly when moving. Sjögren says more than 60 people worked on it, because changing a joint means prototyping, finding suppliers with the right machinery, possibly building custom machinery, and checking with customer-insight experts.

Simple screws and pegs are cheap but may not survive a move.

Snapping into a milled slot removes tools and steps from assembly.

A joint that can be taken apart again helps furniture last longer for the customer.

Custom milling machines make the new detail repeatable at IKEA's scale.

At mass-production scale, a new joint is a supply-chain decision: engineer the part and the machine that makes it together.

The article reports IKEA's own estimate of 50% to 80% less assembly time and gives no sales or durability data. Sjögren says IKEA is focusing more on innovation, aiming for solutions that let a piece live longer with the customer.