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Hinges and Drawer Slides

By austin custom cabinets compass

The hardware you touch a hundred times a day

A kitchen with twenty doors and a dozen drawers gets opened and shut hundreds of times each day. Every one of those motions depends on two small mechanical parts: the hinge that carries the door and the slide that carries the drawer. Both are easy to overlook while choosing colors, and both are among the first things to irritate when they are poorly matched. A sagging door, a drawer that binds halfway or a hinge that slams all trace back to choices made quietly at the order stage.

This page explains how modern cabinet hinges work, how overlay and adjustment fit in, what the main drawer slide types do and what a load rating actually means.

Concealed hinges: the modern default

The cup hinge, often called a European or concealed hinge, is the standard in most current kitchens. A round cup is bored into the back of the door, usually thirty five millimetres across, and a mounting plate screws to the cabinet. An arm links the two. When the door is closed, nothing is visible from outside except the door itself. The hinge is adjustable in three directions: in and out, side to side and up and down. That adjustability lets an installer fix a crooked door in a minute with a screwdriver rather than by shimming or replaning.

Concealed hinges come in different opening angles. A standard hinge opens to roughly a hundred and ten degrees, enough for most doors. Wide angle versions open further, useful for corner cabinets and for pullouts that need clear access. Narrow angle versions suit doors that must stop before they strike a neighbouring wall or appliance.

Overlay: the measurement that picks the hinge

Overlay means how much a closed door covers the cabinet opening or frame. A full overlay door covers almost all of the frame edge, a half overlay straddles a shared partition so two doors share one panel, and an inset door sits entirely within the opening. Each overlay needs a hinge with a matching arm shape: a straight arm for full overlay, a half crank for half overlay and a deeply bent arm for inset. Fitting the wrong arm means doors that sit proud, pinch or refuse to line up, no matter how much the screws are adjusted.

Frameless cabinets nearly always use full overlay with plates that fasten to the inside of the side panel. Face frame cabinets can use plates that mount on the frame edge, or older style hinges that screw to the front of the frame. The cabinet type and door style, covered in the discussion of cabinet door styles, therefore settle the hinge before anyone picks a brand.

Traditional and decorative hinges

Not every hinge hides. Exposed butt hinges, strap hinges and knuckle style pivot hinges are chosen specifically for the look. They show up on furniture style kitchens, rustic cabinetry and inset doors, where the metal becomes part of the design. They are usually fixed rather than adjustable, so the door and opening must be fitted to a high standard from the start. Finishes include black iron, oil rubbed bronze, brass and polished nickel; check that the finish matches the pulls so the metal looks intentional.

Soft close and how it works

A soft close hinge includes a small hydraulic or pneumatic damper that slows the final stretch of the swing, so the door settles into place rather than slapping. Some dampers are built into the hinge arm, and others clip on as a separate piece. Heavier doors need stronger dampers, and a damper that is too weak lets the door bounce back. A fuller explanation is in soft close hinges. A beneficial side effect is less wear on the door edge and the frame.

Drawer slides: the main families

A drawer slide is a pair of rails, one on the cabinet and one on the drawer, that glide on ball bearings or rollers. The common kinds differ in where they mount and how far they open.

• Side mount ball bearing slides attach to the sides of the drawer box and the inner face of the cabinet. They are strong, common and need about half an inch of clearance on each side.
• Undermount slides hide beneath the drawer box. They give the cleanest look and the most usable width, and are described in undermount drawer slides.
• Roller slides use small wheels running in a track. They are light duty, often partial extension, and suit lightly loaded drawers.
• Centre mount slides sit under the middle of the drawer, a traditional method on older furniture.
• Wooden runners are the oldest approach, with a drawer riding on waxed wood. They are quiet and charming, though they need careful fitting and occasional waxing.

Extension: how far the drawer opens

Three words describe reach. Three quarter extension opens most of the way but leaves the back portion inside the cabinet. Full extension lets the drawer come completely out of the box, so everything at the rear is reachable. Over travel extension goes a little further, letting the drawer pass beyond the cabinet face, which helps when a countertop overhangs or a door pull gets in the way. For deep drawers holding pots and pans, full extension is worth wanting, because items at the back of a three quarter drawer tend to be forgotten.

Load ratings in plain terms

Manufacturers rate slides by the weight they can carry when the drawer is fully loaded and evenly distributed. Light duty slides are sized for small drawers holding cutlery and utensils. Medium duty slides handle typical kitchen drawers. Heavy duty slides are intended for deep pot drawers, file drawers and tool storage. A higher rating adds steel thickness and tighter bearings, so it also means smoother motion.

The rating assumes a sturdy drawer box and proper mounting. A thin, flimsy box will flex and bind however strong the slides, and a slide screwed into crumbling particle board will pull out regardless of its label. For readers who want to see how all this hardware performs in daily use, the longer project articles on austin custom cabinets compass describe the finished kitchens in more detail.

Drawer box sizing matters

Slides need exact space. A side mount slide typically needs a drawer box a fixed amount narrower than the opening, and an undermount slide needs a specific box height and a notch or pre drilled holes in the back. Order slides first, then build or order the drawer boxes to match the manufacturer's sheet. A drawer box built before the slides are chosen is a common source of rework.

Installation and adjustment tips

1. Mark the slide position with a level line so left and right rails match.
2. Pre drill pilot holes in dense material to avoid splitting.
3. Fasten the cabinet side first, then attach the drawer side and test the glide.
4. Adjust drawer fronts last, using the slotted holes or tabs on the slide.
5. Test the action empty and again with a realistic load.

Common faults and their causes

A door that droops is usually a loose hinge screw or a hinge fastened into a weak, stripped hole; a longer screw or a filled and re drilled hole fixes it. A door that will not stay closed has a plate set too far back or a weak catch. A drawer that scrapes one side has slides set out of parallel. A drawer that closes by itself, rolling shut, has a cabinet that is out of level. A drawer that rattles has worn rollers or loose mounting screws. Most of these repairs need nothing more than a screwdriver and a few minutes, provided the parts underneath are still sound.

Good hardware is a small portion of a cabinet's total material, yet it governs how the whole kitchen feels in use. Matching hinges to overlay and slides to load and reach, and checking that the box can support both, keeps doors straight and drawers gliding for many years.