Concealed Hinges Explained: 35mm Cup vs 3D Adjustable
Open a cabinet door and look at the hinge, and you'll typically see one of two families of concealed hinge — a standard 35mm cup hinge, or a 3D adjustable European-style hinge. They look similar at a glance but differ in adjustability, installation method, and which projects they suit best.
35mm Cup Hinges: The Standard Choice
A 35mm cup hinge is drilled into a round cup hole bored into the door, with a mounting plate attached to the cabinet frame. It's the most common concealed hinge type in residential cabinetry, widely available, and straightforward to install with a drilling jig.
The 35mm Concealed Hinge Jig Kit gives a fixed, repeatable position for drilling the cup hole, keeping hinge placement identical across every door in a kitchen.
3D Adjustable Hinges: More Fine-Tuning
3D adjustable hinges add independent adjustment screws for height, depth, and side-to-side positioning beyond what a basic 35mm hinge offers, letting you fine-tune door alignment more precisely after installation without removing and reseating the hinge.
The Concealed Hinge Router Jig cuts the slot profile needed for these adjustable hinge styles using a router rather than a drill.
Installation Method Differs
35mm cup hinges use a drilled round hole; many 3D adjustable hinge styles use a routed slot instead, which is why the jig type differs between the two — a drilling jig for cup hinges, a router jig for slot-style 3D hinges. Confirm which hardware style your hinges actually require before choosing a jig.
Overlay Type Matters for Both
Both hinge families come in full overlay, half overlay, and inset variants, which determine how much of the cabinet frame the door covers. This is independent of the cup-vs-3D distinction — confirm overlay type separately based on your cabinet's door style.
Which Should You Choose?
| Situation | Better Choice | Why |
|---|---|---|
| Standard residential kitchen, budget-conscious | 35mm cup hinge | Widely available, straightforward installation |
| Need precise post-install adjustment | 3D adjustable hinge | Independent height/depth/side adjustment without reseating |
| Replacing existing hardware | Match existing style | Avoids re-drilling or re-routing for a different hole profile |
Conclusion
Neither hinge type is universally "better" — 35mm cup hinges are the accessible, widely-supported standard, while 3D adjustable hinges add fine-tuning flexibility for projects where post-install adjustment matters more. Matching the jig to the specific hinge style you're installing is what keeps the actual cutting or drilling step accurate.
Recommended Tools & Accessories
35mm Concealed Hinge Jig Kit – Hole Drilling Guide with Fixture
Why it is relevant: Purpose-built for standard 35mm cup hinge installation, the most common hinge type in residential cabinetry.
Who it is best for: Anyone installing or replacing standard concealed cup hinges across cabinet doors.
Main benefits: Repeatable hinge placement, consistent cup depth, straightforward setup.
Practical use case: Installing matching 35mm cup hinges across a full run of kitchen cabinet doors.
Related Guides
- How to Install Kitchen Cabinets by Yourself — the full installation process this hinge choice fits into
- How to Fix a Sagging Cabinet Door in 15 Minutes — what to do when a 35mm hinge starts failing
FAQ
Can I mix 35mm cup hinges and 3D adjustable hinges in the same kitchen?
It's not recommended for a uniform look, since they use different hole profiles and adjustment ranges — pick one style and stay consistent throughout.
Which hinge type is easier to install for a first-timer?
35mm cup hinges are generally more straightforward, using a simple drilled hole rather than a routed slot profile.
Do 3D adjustable hinges cost more than standard cup hinges?
Typically yes, reflecting the added adjustment mechanism, though the price difference is often modest for the flexibility gained.
How do I know which hinge type my existing cabinets use?
Remove a door and examine the hinge — a round drilled cup hole indicates a 35mm hinge, while a routed slot profile indicates a 3D adjustable style.
Can I switch from one hinge type to another on existing doors?
It's possible but typically requires filling the old hole/slot profile and cutting a new one for the different hardware type, which adds complexity to the swap.