No. 204 Horizontal Mortiser

The machine

The mortise is the slot half of the oldest joint in woodworking, and cutting one cleanly by hand is slow, skilled work. A horizontal mortiser turns the job on its side: the workpiece is clamped to a table and the cutter comes in from the edge, levered by the operator with a machinist’s control over depth and length. Door stiles, furniture rails, window frames — anything that needed a deep, accurate slot came to a machine like this.

The one in this collection

The No. 204 was built around 1905, in the short, interesting window when Greenlee Bros. & Co. was a company in motion. The firm had outgrown Chicago and in 1904 moved its works to Rockford, Illinois; machines of these transition years carry the marks of both cities. That makes the 204 a company history you can put your hands on — iron poured while the wagons were, almost literally, still being loaded.

Alongside the No. 604 it represents the hand-and-lever generation of the collection: machines from before high-speed spindles, when accuracy came from mass, geometry, and an operator who knew what a tight joint felt like.