120 Degree Concealed Hinge for Half Overlay Doors

This Grass Tiomos self-close hinge is built for half overlay doors on face-frame and frameless cabinets, opening to a wide 120 degrees and mounting via pre-installed dowels for a CNC-ready install.

Key Features

• 120 degree opening swings the door well past the standard 110, giving better access to the cabinet interior.
• Self-close spring pulls the door shut over the last few degrees of travel.
• Half overlay geometry positions the door over half the cabinet side, the correct setup for two doors sharing a center partition.
• Dowel mount presses the cup into pre-bored dowel holes for fast, consistent positioning without cup screws.
• Three-way adjustment dials height, side, and depth independently after the doors are hung.
• Fits doors up to 24mm thick, accommodating slightly heavier stock beyond the standard 22mm window.

Where the 120 Degree Opening Earns Its Place

Most standard concealed hinges open to 110 degrees, which suits everyday cabinet access. At 120 degrees, the door swings noticeably further back, a real advantage on deeper base cabinets, pantry boxes, or any run where the door would otherwise block reach into the corners. The half crank arm positions the door at a partial overlay, so it is the right geometry wherever two doors meet on a shared partition or wherever the design calls for a door that covers part, not all, of the cabinet side. The 35mm cup bores into the door, and the arm snaps to a Grass base plate mounted on the cabinet, sold separately. Plates are Grass-specific and are not interchangeable with other brands.

Steel Construction and a Snap-On Arm

The hinge body is steel with a nickel finish. Grass Tiomos uses a snap-on arm engagement: the arm clicks onto the base plate with an audible snap and releases with a lever, so doors come on and off without tools at the arm-to-plate connection. The dowel mount on the cup side keeps the door-side installation fast and repeatable in a production or CNC workflow, pressing into bored dowel holes rather than relying on cup screws. Three-way adjustment handles the fine work after hanging: up to 3mm in any direction to bring a run of doors to an even reveal.

Production Shops and Contractors Handling Mixed Cabinet Types

This hinge is a natural fit for cabinet shops running both face-frame and frameless work on the same project. It handles either construction without a change in hinge, which keeps inventory simpler on mixed jobs. The 42mm boring pattern is the Grass Tiomos standard, so verify your boring setup matches before ordering if you are pulling from a multi-brand jig. Doors from 16mm up to 24mm thick are in range. For a door needing the wider clearance that 120 degrees provides alongside a damped, quiet close, the soft-close version of this series is the one to specify instead.

Common Questions

More Swing, Less Reach

When the job calls for a half overlay door that opens wider than the standard and installs cleanly in a production workflow, this Tiomos hinge keeps the work moving on both face-frame and frameless boxes.