Strap Spring Bar Measurement #2329
Replies: 30 comments
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Posted at 2020-04-12 by Old_account There's no spring bar on the watch, but rather a solid pin holding the strap in place (two pins actually, one on each side, of course). It is 29 mm long and has a diameter of 1.5 mm. The measurments between the two "taps" (I've actually no idea what to call them) on the watch where the strap attaches are as follows (see the disassembly video to see what I mean): Edit: If you want to use a standard strap and have access to a 3D-printer you might want to try something like this: https://www.thingiverse.com/thing:4010651 |
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Posted at 2020-04-12 by Sn3akyP3t3 Thanks so much! Sounds like I'm going to have to wait on making an order for straps for the time being since none of the spring bars sold at https://www.cheapestnatostraps.com are going to work. Its likely going to need some sort of 3D printed adapter to make it compatible with a NATO strap. If you have a moment can you measure the thinnest width of the strap? I'm buying a handful of 22 mm straps for a couple of Pebble Time Steel watches that I'm handing over to my kids when I receive the Bangle.js and I think maybe I should anticipate a one strap size fits both watches depending on the measurement you find. |
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Posted at 2020-04-12 by Old_account The thinnest width of the strap (not counting the narrowing right at the end) is just over 24 mm (24.2), and (for completeness) right by the watch, at the base, it is 34 mm |
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Posted at 2020-04-12 by Sn3akyP3t3 Thanks! I'll try to do something with 24 mm then and perhaps failover if needed to 22 mm to make use of parts I'm getting for the Pebble. Either way probably would work, but 24 mm likely makes it less awkward with proportions. I haven't worked with anything other than PLA yet in 3D printing, but I don't think that's going to cut it for a custom adapter I would have to create to make this possible unless I integrate some metal bushing in there for strength where the spring bar would meet the plastic. |
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Posted at 2020-04-12 by @MaBecker
Try Polymaker’s Polymax - Feels like ABS, but is PLA https://toms3d.org/2017/01/06/feels-like-abs-polymaker-polymax |
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Posted at 2020-04-13 by Sn3akyP3t3 I was thinking I'll try out a PETG based filament for this job since it has excellent mechanical strength, doesn't warp under ranging temps, has a much higher melting point that PLA or ABS so if I accidentally leave it in the car it has a better chance of coming out not warped, and its food safe so I shouldn't worry much about constant contact with skin and leaching chemicals. Thanks for the tip though. |
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Posted at 2020-04-13 by Matt Here are pictures for the measurements of the lug and the pin. Attachments: |
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Posted at 2020-04-14 by Sn3akyP3t3 @user110971 your numbers match those that @Johan_O posted so thanks for the confirmation :) Interesting adapter you found there. I'd like to know if the Suunto core adapter works as well, although I think I'll stick with a custom printed solution as I'm not digging those screws which I can see easily falling out. |
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Posted at 2020-04-14 by @gfwilliams Wow, great spot on those Suunto core adapters! There seem to be a few options on eBay so it'd be great if they fitted properly. |
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Posted at 2020-04-14 by @MaBecker So lets get a pair and design a new adapter to fit on Bangle.js Or just two pairs of tube screws like this: |
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Posted at 2020-04-14 by Sn3akyP3t3 I'd like to see if the existing push pin can be re-used for the printed part, but I can see it being handy to use one of those tube screws if the pin doesn't make a tight fit or is too tight. Unfortunately, I still don't have my watch to get measurements as it seems that it may be stuck in the shipping center Chicago USPS due to this Coronavirus issue. Rather than endlessly asking peeps to take measurements can I ask @gfwilliams if there's a CAD or 3D model available for public reference to make 3D printing stuffs easier to springboard from? I didn't think there would be interest in this so I'm happy to have drawn a small crowd :) |
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Posted at 2020-04-15 by Old_account I'm looking for a good solution for a custom made strap as well (as I'm sure there are many others that might be looking for ways to use the strap of their choice), so this is an interesting subject... Don't know if @gfwilliams has any CAD or model files for you, but from what I understand we're using this hardware, so maybe you could find something for that if you look around (probably not though, but maybe worth a shot). |
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Posted at 2020-04-15 by @gfwilliams I'm afraid there's no CAD model available because it's an off the shelf device, so I guess we'd actually have to make one... Even a proper schematic with measurements would be handy though I guess. |
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Posted at 2020-04-15 by Sn3akyP3t3 @Johan_O thanks for the link. Looks like the same hardware. Something strange happened when I followed that link on my PC. Malwarebytes kicked in to let me know something:
@gfwilliams As soon as my watch arrives I'll start working on building a model unless someone beats me to it. |
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Posted at 2020-04-16 by Sn3akyP3t3 Got my watch in the mail yesterday! I'm gonna start creating an exterior watch core model with AutoDesk Fusion 360 which is free for personal use: https://www.autodesk.com/campaigns/fusion-360-for-hobbyists Make sure you meet the requirements if you plan to use the free personal license. I'm a bit rusty with modeling software so this is going to take some time. In the future I may be building a 3D model generating lidar scanner turntable that could possibly be used to make this sort of work easier. |
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Posted at 2020-04-17 by @gfwilliams That would be awesome - thanks! Actually I hadn't considered this but potentially it'd be possible to 3D print custom watch cases :) |
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Posted at 2020-04-17 by Matt General Question: How would you get waterproof buttons inside a custom made watch housing. [sth. keeping me thinking for a couple of days ;) ] |
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Posted at 2020-04-17 by Purple-Tentacle
O-rings? |
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Posted at 2020-04-17 by @gfwilliams If you're 3D printing you could print the whole housing (or part of it) out of something rubbery that'd flex where the buttons are :) |
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Posted at 2020-04-18 by Sn3akyP3t3 Or you use small magnets and a hall sensor to read then you don't need to have any actual penetration of the watch core hull. I really wonder if the folks over at http://www.polymagnet.com/ would be interested in partnering up for something custom in this area. Those guys over there at poly magnet are amazing! They can custom design magnets to achieve feats that normal magnets that we know today are not capable of! Check out this video to be amazed and get an idea of what I'm talking about: https://www.youtube.com/watch?v=IANBoybVApQ |
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Posted at 2020-04-18 by Old_account There are some really cool things you could do with magnets... That sounds like it could become really expensive, real quick though. :D |
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Posted at 2020-04-18 by Matt In my opinion the simplest solution would be a screwable/pushable/waterproof watch pusher. (like attachments) Attachments: |
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Posted at 2020-04-20 by @gfwilliams Wow, those look lovely. They'd give a really nice finish too |
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Posted at 2020-06-24 by @gfwilliams Just a note about the 'Suunto core adapter' @matt was asking about. Mine arrived and it fits pretty well. It's about 1mm too wide so is a bit floppy, but it's not that bad. Definitely an easy way to get a custom strap on your watch anyway. |
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Posted at 2020-06-30 by tebarius This 'Suunto core adapter' just works fine for me with a normal 24mm lather strap.Attachments: |
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Posted at 2020-06-30 by @gfwilliams Nice - thanks for the picture! |
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Posted at 2021-01-12 by dapgo A very easy solution and very recommended for sports is to adjust a standard silicon strap with a cutter Also I adjusted a spare P8 smartwatch strap (20mm silicon) and the result is more comfortable than the original but it requires more cutting and the result is less impressive than the Garmin.Attachments: |
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Posted at 2021-01-13 by @gfwilliams Nice - that's great! What do you do for the strap pins, because I guess the original pins would stick out the side? |
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Posted at 2021-01-14 by dapgo Regarding using Garmin strap, I forgot to say that it is necessary to carve a bit the cutter the silicon that touch the case Regarding the pin/bar/spring, I found different alternatives,
Also I want to try screw cap bar of 25mm (they are used in some garmin models, like as fr935) but it would require to make bangle.js holes widerAttachments: |
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Posted at 2021-01-27 by dapgo I got some screw cap bar from a Garmin fenix 5 or fr935, the length is perfect but the diameter 2,2mm is too much even drilling inside the bangle.js holes. So the perfect screw cap bar would be one of 1,5mm diameter, like the Suunto core adapter but shorter (22mmlength) Any idea about where to buy this type of screw bars? @tebarius in your photo it seems that you are using 2 short screw bars in each side of the watch. Is it possible or just the picture is hiding part of the bar? |
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Posted at 2020-04-12 by Sn3akyP3t3
I can't seem to find measurements in the watch specifications. I'm planning to buy a handful of NATO straps, but I need to know what the spring bar measurement is in millimeters so I can source the spring and strap sizes appropriately. Here is the site I plan to source parts from: https://www.cheapestnatostraps.com/products/spring-bars?variant=504935013
I don't yet have my watch so I can't get the measurements myself. Hoping someone could take the time to measure theirs and perhaps also get some attention to getting these specs added to the product's page or at least a link to these numbers from some drawing.
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