HOW TO SWAP YOUR 7S26 FOR A NH36 (4R36) - How To Upgrade Your Seiko SKX or Seiko 5
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- čas přidán 26. 06. 2024
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0:00 Intro
0:21 The Problem
1:02 The New Movement
1:28 What Do You Need?
2:18 Removing The Old Weekday Disc
3:12 Removing The Movement Rings
3:52 Now Do It All Over Again
4:08 The Swap
4:47 Checking
5:15 The Reassembly
5:42 Cutting The New Stem
6:25 Some Advice
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#7s26 #NH36 #SeikoSKX
Should you buy a Seiko SKX in 2023? Watch this video here to find out: czcams.com/video/hwC8jZV0248/video.html
It would be really amazing if you could actually make the step by step video
Thanks for the video, very useful.
Thanks for the video! Great for me, as I ´m considering buying parts and building my own "Mod-SKX" with the NH36...
thanks for sharing, very informative.
Glad it was helpful!
Great explanation
Funny, I recently noticed my old Seiko 5 is in rough shape so my first thought was "maybe I can throw a NH36 in there! Will it fit?" and here I am haha CZcams is a beautiful thing! I rarely wear the old Seiko 5, but my father gave it to me, so I would prefer to keep it in good working order. And hacking would be a nice addition! I really don't care for that 7S26 movement at all.. It always kept good time, but when you can buy a fake Rolex POS (crappy skeleton watch that has "Rolex" on the dial) from some sketchy vender in Guatemala for like $15, that has hacking and keeps perfect time! It really makes you look a little differently at your Seiko 5 with the 7S26 haha
Seriously that crappy "Rolex" with the super cheap skeleton movement has no right being as good as it is. I got it for the novelty. So I set it, wound it up and set it down for a day, came back and checked it out and it was still dead on.. I was surprised right then. So I threw it in my back pack and when I got back to the states I put it on my timegrapher, the beat error was pretty much non-existent and it was +2 seconds a day! The stupid thing is ridiculous. It has to be a fluke. I still won't wear the ugly cheap feeling thing, but it'll never not surprise me haha
If you spend around 800 you can get a super clone Rolex with a ETA movement that you can switch anytime instead of paying silly price for service . Quality of finish is amazing even the semi-invisible etching on the crystal , took me half a hour with iPhone magnifier to find it.
thx, just what i need to see. just bought a used sport 5 with faulty 4r36 movement, so i wil buy the nh3X counterpart with crown at 3.8 and giove this a go ;)
I did something similar to this with my SKX. I instead used an old 4R35 from a Seiko that got pretty beat up. I then transferred the calendar wheel, pinion and plastic gear from the 7S over to the 4R35 effectively making it a 4R36 with a weekday wheel. Unfortunately I still cannot get the Bezel to stay on. I even tried a crystal times bezel and it just gets stuck. I also put in a sapphire crystal.
Thanks for the video; I have a watch with a 7S26 that needs a service or new movement. I’ve made a few watches from parts and simple movement swaps, but the C clip removal and day/date wheel swap is a bit daunting to me. It’s a 3 o’clock date and crown so I might be lucky
Thanks for watching!
Hi, what crown shoud i use gor my seiko 5 ? When swapping the movement 7S26 for NH36 ? Can i use the old crown ?
Thank you. And thank you for your video on how to swap out a movement for a better one.
How/where did you order the crown? Did a nh35 crown work on the Seiko case?
Is there a reason you didn't choose the nh36A movement with day date wheel already attached?
Thanks for the video, I plan to swap a 7S26C to 4R36, but as I see, the height of the movements is different, 7S26 is 4.9mm but 4R36/NH36 is 5.32 mm. I know that it is based on the case size and case back, but didn't this cause a problem?
Good point. So far, I have not heard of any issues. I had no problem swapping the movements.
Hast Du ein NH36 gekauft, welches bereits für die 3.8 Uhr Position ausgelegt war oder hast du gar nicht darauf geachtet, da Du so oder so die Wochentags-Scheibe sowie den Halter getauscht hast?
where can we buy the NH36 (4R36)?
Can i do the same with 7s36?
Would a new NH36 with 4 o'clock crown position swap directly without a day wheel swap?
I have the same question. And I guess it would
Do you know if 4R35 and 4R36 movements have plastic parts?
Yes, they do. But only in the date setting mechanism, as far as I know.
Hey, thats a really informative Video. Do you do the swap just for friends or can i send you my snxs79j for a movement swap?
Hi, no unfortunately, I don't do swaps. But I am very optimistic that you can do that yourself. It is an interesting journey and worth the learning experience!
A NH36 dial will fit on a 7s26 movement ? 👀 thx
yes, no problem.
The SKX013 dial feet will fit on a NH36A, correct?
Yes, they do
@@SillyVintageWatches Thank you! Building an SKX013 beefed up with an NH36A, sapphire, and strapcode jubilee. OEM dial and bezel.
Did you find a 013 crown?
Thank you for yor vídeo. It's a pity you don't have recorded all the operations.
I want to swap the 7s25 movemet (no weekday) from a vintage Seiko Samurai (better functions, and now is not working properly).
I was afraid about if the hands tube would be the same size in both movements. It looks it is.
I hope I'll be lucky cutting the stem....😅
Using the dremel, I cant see if you cut the stem, or just sand it, to the right size.
Of course, I want to use the original Samura''s crown. Do you think this will be possible?.
Trying to buy the NH35 movement... Do you have any links that could be useful?. I've seen them in AliExpress, and I think they will be right.
What I don't know where to buy is the crown an the stem. Dou yo have links where to buy them?
Thank you very much, for your help.
Hi, and thanks for your comment! 7s25 & 7s26 are basically the same movement, except that 7s25 has just the date instead of the day-date. All measurements should be the same. The stem, I actually sanded it mostly. You can cut a big chunk off at the beginning, but after that, you have to go in small steps anyway, so it's wise to sand it down.
I can't tell you much about the crown. I would think that the stem is the same, and you can just reuse it as is. But that is also something you can easily check yourself. If it works, it works. Feel free to tell me if that worked!
would this movement work for skx779 ?? with 7s26
Yes, the NH35/36 works in all Seiko watches that use a 7s26.
What movement variant would you recommend for SNXS79? it has 4 oclock crown
Snxs79 has 7s26, the same movement as in the video. So nh36 is needed.
@@objective7042does nh36a with crown at 3.8 require day plate replacement? Also would back case fit well for snxs77?
@@sillylifehacks2950 the size of both movements are identical, the only difference is the stem.
Would this movement work for Seiko SNZG13 with 7S36 ?
Yes, I just did this to an SNZG15, and the procedure is even easier. I didn’t change the plastic movement holder, and it was snug but fit in the case as is. Cutting the winding stem is the same, and the dial and hands go right on.
@@nutsnbolts1968Awesome! Thanks. Did you happen to take photos throughout the process?
hand winding is just a stupid desire when you dont have it. then when you do have it you never use it. i can tell you for 100% certainty that using hand winding on a watch with a screw down crown is completely silly, you will never use it - becase its just a faff to get the crown out. just to or 3 shakes is enough to get the watch wound, set the time and put it on your wrist - it's going to keep charge and keep time.
I have original condition skx and i decided to keep it original, i use nh movements on full builds, but keep my seikos in original condition.
So you cant just take the stem off the crown and replace it with the nh36 stem?
No, unfortunately not. The 7s26 crown and stem of the SKX are one piece and are press fit and don't have a thread.
@@SillyVintageWatches well poop
@@SillyVintageWatches ive seen a few people do this when preforming this same swap on a SNK with the same movement, an old lume shot video comes to mind. obviously the crowns are different, its a little strange to me that the SNK and SKX would not share that ability to replace the stem independent of the crown.
At 1:35 you say the NH36 crown and stem are a single unit and cannot be fit or exchanged to the new movement. I can't make sense of this since the NH36 IS the new movement so why wouldn't they fit the movement they came with? Did you mean to say 7s26 crown and stem?
Hi Robert, you are totally correct: I meant to say the 7s26 crown and stem!
How I'm hearing that they aren't a unit. You just have heat the inside of the crown to soften the thread locker and the crown comes off. This from people who have done it.@@SillyVintageWatches Edit: This was apparently true at one time. I think it may not be true with later watches. I tried today and couldn't get mine off.
@@robertbrandywineso newer seiko 5 watch crowns are permanently attached with stem?
I'll just say I couldn't get the crown off my 7s26C even after applying heat and soaking it in acetone for 24 hours.@@sillylifehacks2950
Why are you swapping the day of the week dial too?
NH36 movements can be bought with a day disc design for a 3:00 or 4:30 crown position. Depending on the movement and the new case it is for, the day disc would not be aligned with the window in the dial. Also, I believe the position of the crown changed slightly from the SKX to newer models, that's why the day disc of a NH36 would not be aligned with an old SKX case. If I am wrong here, please correct me. :-)
is it possible skx779??
Yes, the NH35/36 works in all Seiko watches that use a 7s26.
Only 6 years... My Citizen aqualand from 1996 gave up around 2019, 23 years! A quartz though, not an automatic, but still isn´t 6 years pretty bad?
lots of points of failure in an automatic movement. its easy to break or affect a really small part of the movement causing it to keep time incorrectly
Obviously, treating your watch with care goes a long way, too. At least my SNKL still keeps time very well after almost seven years ... but maybe the SKX's owner just had bad luck, who knows?
Upgrade ...from JAPAN to CHINA :]
4R36 is also Japanese 😐
7s26 not only manufactured in Japan and China but also in Malaysia and Singapore.
I don’t know why people do this movt holder swap. It’s only req’d IF you buy an nh36 with crown at 3. They sell a 4 o clock one too. I just did it yesterday and snapped stam off in crown so now awaiting namokies crown…
Grey and black movement holders are different thicknesses.
They are specific to the length of thread on the caseback so the movement is held correctly when the caseback is tightened down and allows correct amount of compression on the caseback O-ring seal
Nice video if not for the forced lowering of your voice. This makes it worthless.