# The Hardware Layer Hewn Shop Notes · https://hewn.build/shop-notes/the-hardware-layer AI-drafted, not yet checked: Drafted by Chip, the writing system Hewn runs on Claude, from Hewn's craft corpus. Jonathan Salomons has not read this note yet, and no outside reader has checked it. Read it as a shop note: check a number before you cut to it. Cite as: "The Hardware Layer." Hewn Shop Notes, hewn.build/shop-notes/the-hardware-layer. Drafted 2026-05-04; AI-drafted, not yet checked. --- You've fitted the joinery. The glue is cured. The finish is dry and the piece is structurally complete. Then you pick up a hinge and the next hour is decided. Hardware is the last craft decision in a furniture build. Nobody writes romantically about cup hinges. There are no essays about mortising depth for a butt hinge. And yet hardware is where functional failures happen — after the finish is done, after the clamps are off, after you've gotten everything else right. A cup hinge rated for 12 kilograms installed on an 18-kilogram slab door will fail. Not because you installed it wrong. Because you specced it wrong. A drawer slide installed 3mm off-center will bind — not because the slide is bad, but because hardware doesn't negotiate. You can fit a mortise by feel. You cannot fit a slide by feel. The tolerance is in the datasheet, and if you're outside it, you're outside it. Most hardware failures come from one of two places: wrong spec, or right spec installed badly. The diagnosis matters because the fix is different. A binding door from an underrated hinge means you're ordering different hardware. A binding door from a mis-mortised hinge means you're back at the bench with a chisel. --- **The four families** Hardware for furniture organizes into four families, each solving a different mechanical problem. *Hinges.* Pivoting connections. A hinge converts a fixed joint into a rotating one. The common forms: cup (European, concealed, adjustable — the workhorse of cabinet work), butt (traditional, mortised, fixed gap), pivot (top and bottom bearing, for heavy or inset doors), and strap (surface-mount, barn-door and face-frame applications). The choice determines door mass limit, gap tolerance, and how much adjustment you have after installation. Cup hinges give you three-axis adjustment. Butt hinges give you none. *Drawer slides.* Linear bearing systems. A slide converts a static drawer box into a moving one. The choice determines extension percentage, load rating, undermount vs. side-mount geometry, and soft-close provision. Most sliding failures trace to a mismatch between what the slide is rated for and the box you built. *Fasteners.* Fixed connectors. Screws, bolts, threaded inserts, pocket screws, Z-clips, tabletop buttons. These are not interchangeable — each has a specific application envelope and a specific failure mode when used outside it. Tabletop buttons allow seasonal movement. Pocket screws don't. Running pocket screws cross-grain on a solid top is a choice you'll revisit in eighteen months. *Catches, stays, and accessories.* Secondary motion control. Magnetic catches, lid stays, drawer stops, soft-close dampers not integrated into the slide. These get ignored in plan specs. They also produce functional failures after delivery. Worth speccing upfront. --- **The two questions** Every hardware decision answers two questions, in this order. First: Is this the right spec for the application? Load, door size, material density, whether the piece lives in a climate-controlled room or a seasonal shop — all of it affects specification. Get this wrong and installation precision won't save you. Second: Is the installation precise enough for the spec to deliver? A well-specced slide installed 3mm off-center will bind. Hardware has a designed tolerance envelope. You work inside it or the hardware fails. Right spec, installed precisely. If a piece with moving parts isn't working, one of those two things is the problem. --- **What this arc covers** The next six posts walk through each hardware family in detail: selection, specification, installation. Hinges first, then drawer slides, then the drawer box itself (the hardware drives the box construction, not the other way around), then fasteners, then installation craft, then a full hardware protocol to close the arc. Hardware is a specification decision. Know the application before you open the drawer.