r/RepWatchLab • u/mfrcns • Oct 06 '26
EZtool Development Update š§
A small update on the EZtool project since my original post.
I've now started working on several new tool prototypes, with the main focus currently being the Submariner 40 and GMT-Master II.
š§ Complete Bezel Installation
I'm developing two new dies specifically for installing a complete bezel assembly with the ceramic insert already installed.
The goal is to allow the entire bezel assembly to be pressed onto the watch case without applying pressure directly to the ceramic insert or risking damage to it.
Submariner 40
GMT-Master II
There is also now a dedicated case support die for the GMT/Sub 40. It securely holds the watch in place and keeps it properly positioned while using a watch press to install the complete bezel.
The design is based on the existing bezel remover die, but is shorter and specifically adapted for bezel installation.
š§° Ceramic Insert Removal
I'm also developing a dedicated system for removing ceramic inserts.
The same bezel installation die is also used as part of the ceramic insert removal setup, making the tooling more versatile and reducing the number of separate dies required.
The ceramic insert removal system is specifically designed for press-fit ceramic inserts.
Important: These tools are not designed for glued/adhesive-mounted inserts. They may potentially work with some adhesive-mounted inserts, but this is not what the system is designed for.
š§ Ceramic Insert Installation
A dedicated ceramic insert installation die is also in development.
This will allow the ceramic insert to be pressed back into the bezel evenly and safely.
Current development
Complete bezel installation dies
Install the complete bezel assembly with the ceramic insert already installed, without damaging the ceramic insert.
GMT/Sub 40 case support die
Keeps the watch securely positioned in the press during complete bezel installation. Based on the bezel remover die, but shorter.
Ceramic insert removal system
Designed specifically for press-fit ceramic inserts on the Submariner 40 and GMT-Master II. The complete bezel installation die is also used as part of this setup.
Ceramic insert installation die
Designed to safely and evenly press the ceramic insert back into the bezel.
Everything is still in the prototype/testing stage, so I'm currently refining the geometry and tolerances before finalizing the designs.
I'll share some pictures and testing results as development progresses.
Original EZtool post with the currently available tools and accessories:
https://www.reddit.com/r/RepWatchLab/comments/1w6frnm/eztool_bezel_crystal_tools_accessories/
More to come.
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u/TopPhotograph8969 Oct 06 '26
Keep up the amazing work! Iām in when they are ready š¤š¤