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Flush Hinges #1259
Replies: 5 comments 9 replies
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@gramar-bot thank you, and for the photos! There is a little already: with the cone style, setting the leaf thickness to the knuckle diameter makes the leaves lie flush with the knuckles (it opens about 90°), and the leaf style "Fingers" lets the hinge fold all the way round. Here is the chapter. To see what is missing for you: which side should be flush, the outside of the closed hinge, or the leaves with the knuckle? And should it close flat, like in your first photo, or open to 180°? A sketch or a screenshot of your test would help. If layerling is useful to you, a small donation helps me keep improving it. Thank you! |
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here is the stl of the hinge, the leaf on one side has been shifted vertically to allow the two leaves to be flush when closed. with the dimensions of my test the hinge opens about 320 degrees. |
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@gramar-bot thank you for the STL, that makes it clear: one leaf is lifted by its thickness, so both lie flat on each other when it closes, and it opens far beyond 180°. @mlugo-apx, you know the hinge with cones best: would you like to look at adding an option like this? |
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@henmedia yes, I'd like to take it. I'll start on it after the clearance setting for the Swallowtail keys. |
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@gramar-bot thanks for the pictures. Before building it I'd like to match your hinge exactly: the STL didn't come through (only the screenshot did). Could you attach the file, or give the knuckle diameter, the leaf thickness, the gap between the parts, and how you printed it (flat, or with supports under the raised leaf)? By my geometry a raised leaf closes perfectly flat when it is a third of the knuckle's thickness, and on an 8 mm knuckle it opens about 280° by my calculation, not 320°, so I suspect your sizes differ from what I assumed. One thing to try meanwhile: the cone hinge with Leaf thickness at half the knuckle diameter (4 mm on an 8 mm knuckle) also closes with the leaves flat on each other, flush with the knuckles, and prints lying down without supports. |
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mlugo,
I did try to include the .svg, but drag and drop didn't support it, I will attach it here, yes I had to use supports under one leaf, 320 degrees was an (educated) guess but definitely more than 270.
I have not investigated the cone hinge, (tbh didn't know it existed) but I will now.
Well done with all the work, its an amazing product.
Graham
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…On Nov 4 2026, at 10:35 pm, mlugo-apx ***@***.***> wrote:
@gramar-bot ***@***.***/1?redirect=https%3A%2F%2Fgithub.com%2Fgramar-bot&recipient=cmVwbHkrQ1Q3QkpRSE00V1lVTTZCNk01TVpIQ0RMTVQ2UlhFVkJNWEhBQktaU0dNQHJlcGx5LmdpdGh1Yi5jb20%3D) thanks for the pictures. Before building it I'd like to match your hinge exactly: the STL didn't come through (only the screenshot did). Could you attach the file, or give the knuckle diameter, the leaf thickness, the gap between the parts, and how you printed it (flat, or with supports under the raised leaf)? By my geometry a raised leaf closes perfectly flat when it is a third of the knuckle's thickness, and on an 8 mm knuckle it opens about 280° by my calculation, not 320°, so I suspect your sizes differ from what I assumed.
One thing to try meanwhile: the cone hinge with Leaf thickness at half the knuckle diameter (4 mm on an 8 mm knuckle) also closes with the leaves flat on each other, flush with the knuckles, and prints lying down without supports.
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@gramar-bot files attached to an email reply don't reach GitHub, so the STL didn't come through this time either. Could you open the discussion in your browser and drag the file onto the comment box? GitHub doesn't take .stl directly, so please pack it into a .zip first. Then @mlugo-apx can match your hinge exactly. |
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@gramar-bot thank you, Graham. The file didn't come through this time either: attachments sent with an email reply don't reach GitHub. If you open the discussion in your browser, you can drag the file into a reply there (as a .zip if it refuses the file), or just give the sizes in a line: the knuckle diameter, the leaf thickness and the gap between the parts. I'd like to hear how the cone hinge works for you. |
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Fingers crossed. G |
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@gramar-bot thank you, the file came through this time. @mlugo-apx now has what he needs to match your hinge: the STL is 40 × 40 mm and 6 mm thick, so the knuckle looks like 6 mm. Please try the cone hinge meanwhile and tell us how it goes. |
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Stefan,
The cone hinge, as you say, does allow the leaves to lay flat aginst each other, but only when the leaves are exactly half the knuckle diameter thick, thicker and the opening angle is reduced, thinner and they do not lie against each other.
By the way, even if you stand the hinge on on leaf, you cannot measure the entire opening angle as negative angles are not allowed.
G
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…On Nov 5 2026, at 7:28 am, Stefan ***@***.***> wrote:
@gramar-bot ***@***.***/1?redirect=https%3A%2F%2Fgithub.com%2Fgramar-bot&recipient=cmVwbHkrQ1Q3QkpRRU9TRFlZTlZaSFNXUERYSkxMTVY1QlZFVkJNWEhBQktaU0dNQHJlcGx5LmdpdGh1Yi5jb20%3D) thank you, the file came through this time. @mlugo-apx ***@***.***/2?redirect=https%3A%2F%2Fgithub.com%2Fmlugo-apx&recipient=cmVwbHkrQ1Q3QkpRRU9TRFlZTlZaSFNXUERYSkxMTVY1QlZFVkJNWEhBQktaU0dNQHJlcGx5LmdpdGh1Yi5jb20%3D) now has what he needs to match your hinge: the STL is 40 × 40 mm and 6 mm thick, so the knuckle looks like 6 mm. Please try the cone hinge meanwhile and tell us how it goes.
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@gramar-bot thank you for trying it, and for the clear description. That is how the cone hinge works: it only closes flat when the leaf is half the knuckle diameter thick, which is why a hinge with one leaf raised is the better fit for your parts. @mlugo-apx is working on it and has your STL to match it. @mlugo-apx Graham also notes that the opening angle can't be measured fully, because negative angles aren't allowed, even when the hinge stands on one leaf. Maybe that is worth a look while you are at it. |
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@henmedia thanks, I'll take the angle range along with the raised leaf: a hinge that opens to about 320° needs angles past 180° (or below 0), so the limit has to change with it. @gramar-bot thank you for trying the cone hinge; your measurements match what I took from your STL (6 mm knuckle, leaves 1.1 and 0.95 mm, 0.15 mm between them when closed). |
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@gramar-bot the hinge whose leaves lie flat on each other when it is closed is in layerling 1.144.0, thanks to @mlugo-apx, who built it after your printed hinge. Choose Raised leaf under Leaf shape: the second leaf lies higher, so closed it lies flat on the first. With your sizes it folds about 125° below flat. Opening angle now goes from -180° to 180°. The raised leaf prints over air, so it needs supports under it. |
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Can the hinge adjustments be added to to allow more flexibility, e.g. hinges where the plates lie flush.
See images.
I have managed to do it as a test, but found it awkward.
Graham
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