SOSS Hinge Calculator for Concealed Doors

🛠 SOSS Hinge Calculator

Estimate concealed hinge count, mortise depth, reveal, spacing, and fit for flush doors, cabinets, and solid-core slabs.

📌Quick Presets
🔧Unit System
Imperial uses inches and pounds. Metric uses millimeters and kilograms. Values convert internally.
📊Calculator
Flush inset keeps the reveal small and the mortise centered.
Leave door weight blank to estimate from size and material. The calculator converts units and then sizes the hinge count, mortises, and spacing.
Recommended Count
-
hinges
Mortise Size
-
door pocket
Door Weight
-
actual or estimated
Fit Index
-
capacity and clearance
🔍 Calculation Breakdown
🧰Material and Spec Grid
📋SOSS Size Guide
Series Leaf size Door range Best use
📐Material Weight Guide
Material Density Factor Notes
⚙️Installation Clearance Guide
Door type Reveal Count Note
📜Fit Check Guide
Issue Cause Fix Risk
💡Practical Tips
Tip: Match hinge count to door weight first.
Tip: Keep mortises shallow until the fit checks out.
Safety Note
Safety note: Confirm the hinge rating, stay within the door thickness range, and test a scrap mortise before cutting the final door.

SOSS of 1903 always was a leader about invisible hinges. You commonly call them like this because the hinge barrel entirely disappear when the door closes. In many places you use them because of their small size smooth motion and neat skill.

Popular they are in industrial halls business studies and institutions. Also they work well for new kitchen and bathroom furniture because they make closing of doors easy and give a smooth line to the design.

SOSS Invisible Hinges: Uses, Types and How to Install

SOSS invisible hinges open a full 180 degrees. They work as single action hinges. For example some types as barrel invisible hinges are made of solid brass with brass links.

When the door closes you do not see them from any side. Easily they install and work for secret door of a single panel on wainscoting. Also for an extension table you choose them when one sheet must turn in 180 degrees so that the halves slip under the table itself.

Install these hinges can be hard work. It requires very good skill and a deep mortise. That mortise might extend past the thickness of the door frame so plan well before cut in the door frame.

With a router the right bits and jigs help for that task. Some use a router template or guide to do the shallow and deep mortises right. A plunge router with an edge guide or special router bit also work.

Also mind the fold line on the paper template from SOSS. If screws do not go straight their heads can bind.

SOSS bids different kinds of invisible hinges. There are light duty SOSS hinges and heavy power transfer SOSS hinges. You find them for wood and for metal.

For metal furniture there are smaller hinges made specially for them while bigger ones fit in metal doors. SOSS has also steel door brackets for mounting invisible hinges. While some cabinet hinges as those of Blum allow adjustment SOSS hinges do not have that feature.

Even so the closing rate of invisible spring closers you can adjust by means of Allen wrench after installation. All barrel hinges come with adjustable tension screw.

SOSS Hinge Calculator for Concealed Doors

Author

  • Thomas Martinez

    Hi, I am Thomas Martinez, the owner of ToolCroze.com! As a passionate DIY enthusiast and a firm believer in the power of quality tools, I created this platform to share my knowledge and experiences with fellow craftsmen and handywomen alike.

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