Installing Watch Hands Without Ruining Them
Watch Hands: Post Sizes, Removal and Installation
Hands are the most visible part of any build and the easiest to ruin — bent seconds hands, scratched dials, loose minute hands that slip. Everything comes down to one concept: post sizes and friction fit.
The Three Post Sizes That Matter
Every hand set is defined by the hole diameters that slide over the movement's cannon pinions:
| Hand | NH Family Post Size (class) |
|---|---|
| Hour | ~1.5mm |
| Minute | ~0.9mm |
| Second | ~0.25mm / 0.9mm pipe depending on style |
These are shared across NH35/36/38/34 — one hand collection serves the whole family. Exceptions: GTM hands for the NH34's fourth pivot are GMT-only, and VK chrono platforms use entirely different posts.
Friction Fit: How Hands Actually Stay On
No screws, no glue — hands press onto slightly undersized pivots and grip by friction. Consequences:
- A hole too large = hand slips or falls off; nothing fixes it except a different hand
- A hole too small = forcing it bends the pivot or splits the hand bore
- Correct press-on force = firm push with a hand press or fingernail pressure on the exact center
Removal Without Damage
- Remove the crystal/caseback so you can access the dial face
- Use a hand-removal tool (prestometer-style pliers that pull both hour and minute simultaneously) — it grips under the hand, not against the dial
- For the second hand, tweezers under the counterweight with something thin protecting the dial beneath
- Lift straight up. Sideways leverage bends posts and scratches dials irreversibly
No tool? A plastic card slid flat under the hands, protecting the dial, works in a pinch — slowly and evenly.
Installation Order and Technique
- Set the time to ~12:00 first (or 6:30 if near the date danger zone) so all hands align on one axis
- Hour hand on, pressed square with a hand press or fingertip on the center boss only
- Minute hand aligned exactly at 12, then second hand last
- Check clearance: rotate through a full revolution watching for the tip catching the chapter ring or crystal — especially with tall lume blocks
- Verify at midnight: date flips cleanly, hands don't collide
Choosing Hands for Your Dial
- Length: minute hand should reach or just touch the chapter ring markers; hour about 60–70% of that
- Lume match: same grade as your dial — see our C3 vs BGW9 guide
- Style pairing: sword/Mercedes for divers, dauphine for dressy, syringe for field looks
Frequently Asked Questions
My second hand wobbles — broken?
Usually a not-square press. Remove and re-seat dead center; true wobble means a bent pipe, replace the hand.
The minute hand drops when I flip the watch.
Bore too big for the pivot — wrong hand set. No adhesive fix survives long-term; get correct-size hands.
Tweezers scratched my dial installing hands.
Protect every work session with a thin plastic film over the dial, lifting only where the hand goes.