Put quite simply, a cabinet is essentially a box with an attached front. The front includes the face frame, doors, hinges, and drawer fronts. The box itself encompasses the back, sides, top, bottom, drawer boxes and glides, shelves, and interior lining.
The individual parts will vary in thickness. The level of quality will depend on the model and manufacturer. The methods of construction utilized greatly impact the overall quality.
In fact, when shopping for cabinets, take a good look at their components and assembly. Inspect the drawer box and confirm that it is solid and sturdy. It is usually the first part to fail in cheaply made cabinets.
Breaking Down The Parts of a Cabinet
You’ll want to know what you’re looking at and if you are going comparison shopping for cabinets. Below is a list of the individual parts that typically form a cabinet’s construction:
1. The Cabinet Frame
The cabinet frames are only present on traditional American-style cabinets. Frameless cabinets are usually European-style cabinets. The frame is securely attached to the front of the box and made of solid hardwood about ¾” thick.
Typical, good-quality frames will be joined together either by dowel or pocket screw joints (each is exceptionally durable). You can spot a cheaper frame easily when the frame is stapled together.
2. Doors and Drawer fronts
Doors and drawer fronts are also made of solid hardwood (when of higher quality). The average five-piece frame and panel door is made from ¾” thick hardwood. A center panel is usually held in place with 4 frame pieces called rails and stiles.
The doors are built this way so that the natural expansion of the center wood panel will shift around the inside of the frame without warping the door.
Some doors have a center panel made from a Medium-Density Fiberboard (MDF). These center panels are usually on painted doors, where you won’t need to see any wood grains.
3. Hinges
Hinges for cabinets vary greatly. It is imperative to use high-quality hinges with kitchen 
cabinetry.
A door is likely to be opened and shut thousands of times throughout its use. Hinges are hidden when employed with full overlay doors unless intentionally exposed for the sake of a certain style.
Typically, it will feature a soft-close function and be constructed of steel with a nickel-plated finish. There are many types of hinges, and different features have been designed to accommodate any need or whim.
4. Drawer Box and Glides
Another important area to ensure high quality is the actual construction of the drawer box and its glides. They’re not something to go cheap on.
The drawer box needs to be durable and capable of accommodating twenty pounds without issue. It is also utilized a half-dozen times daily, which adds up to being opened and closed over 2,000 times per year!
Drawer Box
You will find cheap drawer boxes of low quality made with particleboard, plastic, metal, or plywood. Its sides use butt or notched joints that are secured only with staples.
However, drawer box materials and their construction are important since they are among the first things to become worn in a kitchen, especially if they are cheaply made.
Even if it is just the standard quality of a decent box, it must feature solid hardwood sides and a back at least ½” thick with dovetail joints. The bottom should typically be plywood and fully set into grooves on all four sides.
Drawer Glides (Runners)
Drawer Glides (Runners)
Most people prefer to have cabinet drawers where you don’t see the drawer glides when you pull out the drawer.
The more expensive and higher-quality glides are usually under-mount glides that attach to the bottom of the drawer.
Ideally, they are made of steel, have ball bearings, and have a soft-closing mechanism. A solid glide can support 90 pounds while still being able to open and close comfortably.
Many of the better drawers will have glides that allow you to extend the drawer out so you do not have to reach deep inside to retrieve items far in the back.
5. Shelves
It is not uncommon to see cabinet shelves made of plywood or particleboard. Unfortunately, durability is a serious issue when it comes to cabinets. They must bear heavy weight for long periods of time.
Plywood is less likely to bow under the weight of pots and pans or ceramics than particleboard is, which (of course) is more affordable. Stay away from it if possible, it’s likely to sag, flake and be crushed. Shelf thickness is generally at least ½”, but ¾” is the preferred ideal.
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