Adjusting Non-Adjustable Butt Hinges
Working with these traditional hinges takes a bit of old-fashioned ingenuity.
High-quality butt hinges are handsome and durable for furniture and built-in cabinet doors. If you’re in the business of built-in cabinetry and sometimes work in houses constructed between the late 1800s and the 1930s, you’re almost certainly familiar with butt hinges, which were widely used for doors over these decades.
Among the most common hinges, at least in the United States, are 2 1/2″ ball-tip butts with removable pins. These are still available in the original proportions from several vendors. An alternative type of butt hinge widely used in the UK is the solid-drawn brass butt hinge with a fixed pin. Both types consist of two leaves and a center barrel fitted with a pin that ties the leaves together. Loose-pin butt hinges allow the pin to be removed while the leaves remain on the door stile and cabinet respectively, which facilitates the fitting of doors. Fixed-pin butt hinges do not offer this option.
While some applications call for mortising only the door stile and simply screwing the second leaf to the surface of the cabinet side, butt hinges traditionally have one leaf mortised into the door stile and the other mortised into the cabinet. The layout and cutting of the mortises must be precise, and there is no obvious way to adjust the fit once the door is hung. Not surprisingly, then, many cabinetmakers avoid these hinges in favor of a modern variation that does not require mortising and is made with slots that allow the door to be adjusted up or down, as well as in or out of the cabinet relative to the face frame.
While these surface-mounted butts are inexpensive, quick to install, and easy to adjust, I’ve never overcome the sense that they are a kind of cheat. One of the joys of using butt hinges is seeing them cleanly fitted to their mortises. Cutting mortises takes just a few minutes when you’ve mastered the technique. It’s also a satisfying job.
No matter how meticulous you are with your layout and mortising, some doors are going to need adjustment. That’s where a few tricks of the trade come in.
Hedge Your Bets
When installing doors with butt hinges, start by inserting only as many screws as you need to hold the door firmly in place while checking the fit. I usually put the door leaf on with two screws—one in the top hole, one in the bottom, leaving the center hole to be drilled later on. This way, if I have to alter the position of the hinge, I can drill a hole in just the right place, then fill the original holes and re-insert those screws later.
For the second leaf—the one that goes on the cabinet—I usually use just one screw per hinge to start. I drill and insert the top screw for the top hinge and the bottom screw for the bottom hinge. If there’s a third hinge (as there often is with doors 48″ and taller), I use one of the holes (any one of them will do).
Adjusting a Door Up or Down
Warning: the faint of heart should skip this paragraph. If a door needs minor adjustment, a good rap with a hammer will often do the trick. To move the door down a hair, open the door fully and hit the top of the hinge stile; to move it up, hit the hinge stile at the bottom. Depending on the type of wood you’re using and the hardness of the metal screws (brass being softer than steel), you should see a little shift in the position as the wood below (or above) the screws compresses slightly, the screws bend a tiny bit, or both. Obviously this trick demands care. If you hit the door too hard you may damage the door or the cabinet, break screws, or damage the hinge. That said, it is often just the ticket. To keep the door in its new position, drill a second hole for each leaf on the cabinet and insert those screws.
If you need more than slight vertical adjustment, you will probably have to lengthen the mortise of each leaf. Decide where the resulting small gap will be less visible—on the cabinet or on the door—then mark the amount to be removed with a square and marking knife, and trim with a chisel. Note that if you want to move the door up and are going to lengthen the mortises on the cabinet, you will remove stock at the top of each mortise. If you’re going to adjust the length of the mortises on the door, you will remove stock at the bottom of each mortise.
Adjusting a Door Relative to the Cabinet’s Face
In most cases, a cabinet door should hang flush with the face of the cabinet. If it’s slightly behind the cabinet face, you can move it out by removing one screw from one of the leaves on the cabinet, pulling the door toward you just a hair, and drilling a new hole. Then insert the screw. Repeat with the other hinge(s) until the door hangs flush.
If the face of the door is protruding from the cabinet, you’ll need to widen the leaf mortise on the cabinet. Remove the door from the cabinet and set a marking gauge to the width of the leaf plus the amount by which you need the door to move back. Mark this on the cabinet, score the wood fibers at the top and bottom of the mortise with a knife and square, then chisel out the waste. Drill new holes as necessary, insert screws, and check the fit.
If for some reason you cannot widen the mortises on the cabinet, you can fall back on Plan C: planing the excess from the door’s face. But this is a last resort.
Fixing the Gap Between Door and Cabinet
If you made your mortises too deep, the door will likely bind instead of opening. We call such doors “hinge-bound.” The fix for this is to shim the hinge out. The material you use for this may vary depending on the amount of shimming you need, the final finish, and (to be brutally honest) the materials you have available.
The crudest trick to shim a hinge by just a hair is to cut a piece of masking tape as long as the mortise and stick it in. If you need more thickness, add a second piece. This surprisingly simple fix will often do the trick.
A common material for slightly thicker shimming is cardboard. People generally advise against using cardboard because it can compress, but if you use dense stock, such as the flaps of screw boxes, you can often solve the problem. A dab of glue will help hold the shim in place; once the screws are in, they will clamp it. Often, though, I don’t use any adhesive; I just rely on the screws. (This is why you’ll often find little bits of folded paper or card stock behind the doors in old houses. It’s an age-old carpenter’s trick.)
The cleanest solution, if you have time for it, is to make a shim just the right thickness out of the same stock as the cabinet and door, glue and clamp it in place (using tape and a piece of scrap the length of the hinge leaf as a caul), then proceed as above.
If the gap between the door and the cabinet is too large, you’ll need to deepen the mortise in one of those parts. The door is usually the easier to deal with, as you can remove it from the cabinet and put it in a vise (whether in the shop or on a jobsite workbench). Marking out the cut is tricky because your gauge may want to lean into the mortise, which will give you an inaccurate position. I use a steel straightedge and a marking knife to make a line on the door face parallel to the existing one.
While it’s certainly true that traditional butt hinges take more care and skill than the non-mortised type, these tricks should help your doors hang flush, with uniform gaps.
Filling Screw Holes