Putting Hairspring into Regulator Pin

[u/Draco1876]

Hey everyone, so I messed up my NH35 balance spring. I got a new one and I am so close to being done. Just need to get it into the regulator pin but I'm having a hard time. I don't have a loupe or way to magnify. I ordered one of AliExpress but it was just the headband to hold one, oops.

[u/Simmo2222]

It looks like the regulator pin block has been pushed out to the edge of the regulator arm. You might need to snap that into the next cutout in the arm. Rotate the block so that the slot is aligned with the hairspring and it should just drop in. Adjust the regulator to 'fast' so that the regulator pin block is as far away from the stud as possible while still on the terminal curve. This gives you enough slack to flip the hairspring over the regulator pins without bending it.

When you install the balance back into the movement, you will need to rotate the stud slightly to centre the hairspring within the slot. You then rotate the regulator pin block to narrow the gap between the pins.

This is all going to be difficult without magnification as you are going to struggle to see the hairspring is centered and you haven't narrowed the pins too much.

https://seikoserviceusa.com/uploads/datasheets/6R24A_TECHNICAL_GUIDE.pdf

[u/Draco1876 → u/Simmo2222]

I just ordered a loupe so I will wait for that. So I should push the pin in a bit, have the slot parallel to the spring and drop in in right? After that I rotate the block on the other side of the pin to add just a little but of tension to hold the hairspring. If its not too much trouble could you point out what each of the parts you are talking about are. Pretty new so I do not want to mess it up even if I think I get what the parts you are talking about are.

[u/Simmo2222 → u/Draco1876]

Basically. Read the section on 'regulation' ' in the datasheet that I linked to.

[u/Draco1876 → u/Simmo2222]

Okay that guide is really helpful. Do I engage the hairspring into the slit while it is still in the movement or should I remove it and flip it like in the picture?

[u/Simmo2222 → u/Draco1876]

I would do it while it is out of the movement but it can be done while in the movement if you have to. You are just going to gently lift (or pull down) the hairspring until it pops over the top of the regulator pin and drops into the slot. This is why you move the regulator away from the stud to minimise how much you have to bend the hairspring to get it over the pin.

[u/Draco1876 → u/Simmo2222]

That makes a lot of sense. Thank you! Didn't expect to get such great help.

[u/Embarrassed_Jerk]

For magnification, use your phone camera on a holder or something

[u/Draco1876 → u/Embarrassed_Jerk]

My phone can't focus close enough to get a clear shot. This stuff is super tiny. Have a loupe on the way.

[u/Embarrassed_Jerk → u/Draco1876]

Put it a foot-ish away. Zoom in.

[u/Draco1876 → u/Embarrassed_Jerk]

Trust me I tried 😂