Holders: Sizing for Your Calibers
Author: Funny Items
Release time: 2026-08-26 05:34:35
View number: 14
Holder Sizing by Caliber
Movement holders come sized for specific calibers — using wrong sizes risks bent components. Here is the matching guide.
NH Family Sizing
| Movement | Diameter | Holder Requirement |
|---|---|---|
| ~31mm movement plate | Standard "Seiko NH" holder jaws — widely available | |
| Similar footprint, different height profile | Verify jaw depth accommodates pusher assemblies |
Adjustable vs Fixed Holders
- Adjustable jaw holders: accommodate multiple calibers — the versatile choice for builders working across platforms
- Fixed caliber-specific: perfect fit for one movement family; slightly better stability per use
Usage Reminders
- Jaws snug against movement edge — not crushing, just stable
- Dial side up for hand/dial work; flip carefully for caseback-side tasks
- Clean jaws regularly — grit trapped against movement plates scratches
Workshop fundamentals in our holders guide; improvised alternatives in the substitutes guide.
Frequently Asked Questions
One holder covers all my needs?
An adjustable NH-family holder covers most modding scenarios — VK63 users verify depth before purchasing.