Hardware guide
Drawer Slides: Types and Sizing Explained
Compare side-mount, undermount, and center slides, plus load ratings and the clearance they need, with charts to size drawer boxes that fit and glide.
Research Lens
How can a personal builder use CutList to finish drawer slides: types and sizing explained with fewer mistakes?
The hobby workflow is strongest when the app is used as a planning checkpoint: define the project, enter accurate stock and parts, generate a visual layout, then use cost, waste, grain, kerf, PDF export, project history, and offline access to control the real cutting session.
Decision Metrics
Visual model
Hardware first, drawer box second
Each slide type needs specific clearance, so the slide spec sets the box dimensions.
Slides Decide The Drawer Box Size
Drawer slides are the hardware that makes a drawer glide, and their required clearance dictates how big the drawer box can be. Choosing the slide before cutting the box is essential, because each slide type demands a specific gap between the box and the cabinet. Build the box first and guess the slide, and the drawer will not fit.
Side-Mount Slides Are The Standard
Ball-bearing side-mount slides are the common choice: reliable, easy to install, and widely available. They typically require a precise clearance on each side of the drawer box, often around half an inch, so the box is cut narrower than the opening by the total clearance. They show at the drawer sides but are simple and forgiving.
Undermount Slides Hide And Glide
Undermount slides mount beneath the drawer and stay hidden, giving a clean look and often soft-close action. They demand tighter tolerances on box height, depth, and bottom placement, so they are less forgiving of a sloppy box. The payoff is a premium feel, but the cut list must match the slide's specifications closely.
Load Rating And Length Matter
Slides are rated for a load and come in set lengths. A heavy drawer of tools needs a higher-rated slide than a light utensil drawer, and the slide length should match the cabinet depth. Undersizing the load rating leads to sagging, sticking drawers. Pick the rating and length before sizing the box and the cabinet depth.
Size The Box From The Slide Spec
The reliable workflow is to choose the slide, read its clearance and length spec, then size the drawer box and cabinet opening to match. Use the cut list calculator to set box parts to the exact width the slide needs, and confirm the cabinet depth suits the slide length. Hardware first, box second, every time.
Data charts
Compare
Drawer slide types
| Slide | Look | Tolerance | Best for |
|---|---|---|---|
| Side-mount | Visible at sides | Forgiving | Most drawers |
| Undermount | Hidden | Tight | Premium, soft-close |
| Center-mount | Mostly hidden | Moderate | Light traditional drawers |
| Heavy-duty | Visible | Forgiving | Tool and pantry drawers |
Field Checklist
- Choose the slide before cutting the box.
- Subtract the slide clearance from the opening.
- Match load rating to drawer weight.
- Match slide length to cabinet depth.
- Use undermount only with tight tolerances.
FAQ
Common questions
How do I size a drawer box for slides?
Choose the slide, read its clearance spec, and cut the box narrower than the opening by the total clearance.
What clearance do side-mount slides need?
Commonly about half an inch per side, so an inch total off the opening width; confirm your slide's spec.
Which slides are easiest to install?
Side-mount ball-bearing slides are the most forgiving and widely available.
What load rating do I need?
Match it to the drawer's contents; tool and pantry drawers need heavy-duty slides to avoid sag.
Sources