Hide Lazy Susan Hinges (Concealed Hardware)
To conceal a lazy Susan cabinet’s hinges, choose hardware made for the door style and follow that hinge maker’s current drilling template. There is no universal cup position, gap, or load limit. Check the door’s full swing and the carousel’s full rotation before drilling, then adjust and test the complete assembly so hidden hardware does not create a hidden collision.
A common misconception is that any concealed cabinet hinge can replace a visible hinge if its cup fits the door. It cannot. Lazy Susan doors move close to a rotating shelf, and a hinge that seems to fit may obstruct the door swing or catch the carousel at one point in its rotation.
The reliable approach is to match the hinge to the door and cabinet, then verify the movement before cutting or fastening anything. I treat the hinge maker’s installation sheet as the source for dimensions, and the assembled cabinet as the source for clearance checks. Neither a generic diagram nor a closed-door inspection can confirm the whole job.
Plan the Hinge and Door Configuration
First identify how the Lazy Susan door opens and how it relates to the rotating shelves. The hinge must suit that door arrangement, its dimensions, and the cabinet’s construction. The product’s installation sheet sets the drilling layout and limits; there is no single layout that applies to every Lazy Susan cabinet.
Identify the door style and hinge
A Lazy Susan may have a bifold door, a pie-cut door attached to the rotating unit, or a single door. These arrangements do not use identical hinge geometry. Confirm what moves with the cabinet and what moves with the carousel before choosing concealed hardware.
Check the hinge maker’s current instructions for the exact model. Confirm its permitted door type, thickness, size, mass, mounting method, overlay or inset, and required hinge count. Do not assume that a hinge will work just because it is described as “concealed” or fits a familiar cup bore.
ANSI/BHMA A156.9 covers cabinet hardware. It does not provide a universal Lazy Susan hinge layout, clearance, or load rating. Ordinary cabinet hinges also do not have a general IRC, IBC, or NEC installation specification. If a project has specific code or inspection needs, check with the local authority.
| What to confirm | Why it matters | Where to verify |
|---|---|---|
| Door style and movement | Determines the hinge arrangement and swing path | Cabinet layout and hinge instructions |
| Door size and mass | Affects hinge selection and quantity | Hinge maker’s limits |
| Overlay or inset | Sets the relationship between door and cabinet | Product template and drawings |
| Cabinet material | Must hold the specified fasteners | Cabinet inspection and fastener instructions |
| Carousel sweep | Reveals potential contact points | Full movement test |
A 35 mm cup is not a universal standard for every concealed hinge. Use a 35 mm bore only when the selected hinge calls for it, and verify both bore diameter and depth in that model’s drilling sheet. Cup position and plate setback must also come from that hinge’s template.
Verify Swing, Carousel, and Mounting Clearances
Clearance is the space the moving parts need to pass without touching. For a Lazy Susan, it must be checked across the door’s full opening arc and the carousel’s full sweep, not just with the door shut. No single gap applies to every assembly; the hinge instructions and a full dry-fit establish what works.
Map the movement before drilling
With the carousel installed, move the door through its complete opening and closing path. Then rotate the shelves through a full cycle while checking the door edge, hinge parts, pull, and shelf edges. Watch for contact at intermediate angles, where a static check can miss it.
Repeat the check with shelves loaded as they will be used. The load can affect shelf movement and may reveal a collision that is not apparent when the carousel is empty. Do not treat a clear, closed-door position as proof that the assembly is clear.
Also inspect the cabinet for out-of-square conditions. A cabinet that is not square can change door gaps and movement. Record any tight spots and identify whether the cause is the hinge position, door alignment, cabinet shape, or carousel position before making changes.
| Check | Pass condition | If it does not pass |
|---|---|---|
| Door opening and closing | Door moves without binding or striking nearby parts | Recheck hinge choice, layout, and alignment |
| Full carousel rotation | Shelves complete the sweep without touching the door or hinge | Find the contact angle and locate the interfering part |
| Loaded carousel movement | Intended shelf load does not create contact | Reassess shelf position and clearances |
| Cabinet and door alignment | Gaps remain usable through the movement | Check for out-of-square construction and hinge adjustment limits |
There is no code-prescribed door gap for this hardware. Establish the gap for the specific assembly by following the hinge instructions and testing the movement. If you cannot confirm clearance throughout the full sweep, do not proceed to final fastening or concealment.
Install and Conceal the Hardware
Concealed hinges should disappear from view without being buried or blocked. Mark and bore only from the selected hinge’s template, use the specified fasteners, and keep adjustment points accessible. A trim piece or filler that hides the hinge but stops movement or service access is not a sound concealment method.
Follow the hinge maker’s layout
Survey the parts. Confirm the door style, hinge model, door thickness and mass, cabinet construction, carousel sweep, and nearby pulls or hardware. Get the current installation sheet before marking the door.
Dry-fit and mark. Check the complete door and shelf movement. Set cup location, bore depth, plate setback, and overlay or inset from the model-specific template. Do not transfer dimensions from another hinge, even if its cup is also 35 mm.
Bore carefully. Use the specified bore diameter and depth. A bore that is too deep or poorly placed can weaken or break through the door. If the drilling sheet or door construction makes the cut uncertain, stop and confirm the method with the hinge maker or a qualified installer.
Fasten to sound material. Attach hinge plates using the specified fasteners and a sound cabinet substrate. If the substrate cannot hold those fasteners, use reinforcement approved for the installation rather than relying on a loose or improvised attachment.
Adjust within limits. Use only the hinge’s designed adjustment range to align the door. Do not force the hinge past its range to compensate for a wrong cup position, unsuitable hardware, or cabinet alignment problem.
Keep adjustment screws and fasteners reachable. Do not fill, cover, or finish over areas that must move or be adjusted. Finish exposed edges without fouling the hinge or obstructing door movement.
Cycle-Test and Verify the Finished Assembly
A final check must include both door motion and carousel rotation. Move each through its full range, look for contact, and confirm that the door remains aligned. Concealed hardware can look correct while still entering the carousel’s path at one rotation angle.
Check the whole assembly
Cycle the door open and closed, then rotate the carousel through a complete sweep. Repeat with shelves loaded as intended. Listen and feel for rubbing or impact, and inspect the hinge, door edge, pull, and shelf edges for contact marks.
If anything binds, stop and find the cause. Adjust only within the hinge maker’s range. If the door still collides, revisit the hinge choice, drilling layout, cabinet alignment, or carousel position. Do not hide the problem with trim or by limiting normal movement unless the product design specifically requires that limit.
Ordinary cabinet hinges have no special airflow or CFM requirement. Ventilation matters only if the cabinet encloses equipment with its own ventilation instructions. Do not add vents as a hinge requirement.
Installation scenarios
Bifold door near a rotating shelf. In this layout, both the folded door and hinge parts may approach the carousel. I would test the full opening arc and full shelf sweep before drilling, then check again with the shelves loaded. The specific hinge template and observed clearance decide whether the selected hardware fits.
Single door with a tight cabinet opening. A door may clear the cabinet edge when shut yet strike a shelf as it opens. Mark the contact point during a dry-fit, check whether the cabinet is square, and compare the layout with the hinge’s allowed adjustment. Do not enlarge or relocate a bore based on a generic diagram.
These are diagnostic examples, not product-specific installation results. In both cases, the next step is to correct the identified fit issue before finalizing the hardware.
Conclusion
Concealing a Lazy Susan hinge is a fit-and-motion problem, not just a matter of hiding visible metal. Choose hardware for the exact door arrangement, follow its current template, and verify the full door swing and carousel sweep before and after fastening. There is no universal cup layout, gap, or load rating to substitute for the maker’s instructions. Keep the hardware serviceable, and do not accept a static clearance check as proof of a safe fit.
Frequently Asked Questions
These answers cover common choices and checks for concealed Lazy Susan cabinet hinges. The hinge model and cabinet arrangement remain decisive: use the maker’s current instructions for drilling, load limits, mounting, and adjustment, then confirm that the installed door and carousel move without contact.
Can I use any concealed cabinet hinge on a Lazy Susan door?
No. The hinge must suit the door style, dimensions, and cabinet geometry. Check the maker’s permitted door type and installation sheet.
Are all concealed hinges made for a 35 mm cup?
No. Use a 35 mm bore only when the selected hinge specifies it. Confirm bore size and depth in its drilling instructions.
Where should I drill the hinge cup?
Use the selected hinge’s template. Cup position varies by model, overlay or inset, door type, and cabinet arrangement.
What gap should I leave around the door?
There is no universal Lazy Susan hinge gap. Follow the hinge instructions and verify that the door and carousel clear one another throughout their movement.
How do I know if the carousel will hit the hinge?
With the carousel installed, rotate it through its full sweep while moving the door through its full opening arc. Repeat with the shelves loaded as intended.
Can I copy dimensions from another 35 mm hinge?
No. Cup diameter alone does not determine cup depth, setback, overlay, or plate geometry. Use the template for the exact hinge model.
How many hinges should the door have?
Use the hinge maker’s guidance for the door’s size and mass. Do not add individual hinge load ratings together to create a door limit.
Can trim hide a hinge that is in the way?
Not if it blocks movement, fastener access, or adjustment. Find and correct the interference rather than covering it.
Does the hinge need extra ventilation?
Ordinary cabinet hinges do not have a special airflow requirement. Follow ventilation instructions only for equipment housed inside the cabinet.
Do cabinet hinge rules set a universal Lazy Susan layout?
No. ANSI/BHMA A156.9 covers cabinet hardware, but it does not set a universal Lazy Susan hinge layout, gap, or load rating. Use the hinge maker’s instructions and check any project-specific requirements with the local authority.
(This article was written by one of our staff writers, Andrew Fairchild. Visit our Meet the Team page.)
