Customers often ask: "The slides I use are already good ones — smooth as anything. Why would I add a buffer?"
There is a wrong assumption buried in the question: a buffer is not about smoothness. It is about how the motion stops.
The slide covers the whole travel; the buffer covers the end of it
The slide makes the drawer run smoothly, without play, under load — through the entire travel.
But from the moment you let go to the moment the drawer stops, the slide does nothing. It simply lets the drawer carry its inertia into the end stop. More inertia — a heavier drawer, a harder push — means a louder hit.
That "slam" is the sound of that unmanaged last stretch.
Why the feel is not proportional to slide quality
A smoother slide actually makes it worse: less friction means the drawer arrives at the end faster, so the impact is harder.
So "I fitted better slides and it got noisier" is a normal outcome, not a fault in the slide.
What the buffer actually takes charge of
- Speed — it lowers the speed at the end, turning an impact into a landing.
- Sound — the knock disappears, and the cabinet stops amplifying it.
- Return — it pulls a drawer that was not quite closed back home, so the gaps line up.
That last one is often overlooked but shows most in the finished product. Half a centimetre of variation across a row of drawers makes the whole cabinet look cheap.
When you can leave it out
Not every application needs one. You can reasonably skip it when:
- The drawer is light and rarely used — the top tray of a tool cabinet, for instance.
- The environment is noisy anyway, and nobody notices a closing sound.
- The customer explicitly accepts a non-soft-close specification — put it in the spec and it is a decision, not an oversight.
Conversely, wherever people spend time — kitchens, bedrooms, offices — the benefit is obvious, and it is a difference the end user feels directly.
How to size it
Three things set the value: drawer weight, the slide's speed at the end of travel, and the feel you are after.
Our typical band is pull-out force 15–25 N and return time 0.8–1.2 s, both adjustable to the mechanism. Tell us the drawer weight and the feel you want, and we will propose values — far more useful than asking "what is your standard?"