Modular Screwdriver Sharpening Tool

Modular Screwdriver Sharpening Tool is a professional watchmaker tool designed for the demanding watchmaking workshop. Whether you service a Rolex, an Omega or an entry-level Seiko, this accessory delivers the precision, the grip and the durability you expect from a serious bench tool. Manufactured to withstand intensive use, it earns a permanent place on the bench of every watchmaker, restorer and informed enthusiast.

Product overview

A perfectly sharp screwdriver blade is the difference between a clean screw head and a ruined movement. This compact accessory holds the screwdriver in a precise position so the bevel can be reground evenly on a sharpening stone. The body is machined from hardened steel (around 58 HRC) and exposes a central 5 mm hole that accepts the most common Bergeon and generic watchmaking handles. A small locking screw clamps the shaft firmly while the operator works the blade against the stone.

Used in a workshop alongside Bergeon screwdrivers, tweezers, a quality crystal press and a sturdy watch case holder, this watchmaker tool contributes to the kind of repeatable, controlled work that makes the difference between an amateur job and a professional service. It is equally relevant on a Rolex, an Omega Speedmaster or a Seiko 5, and it follows the dimensional and material standards (mm, HRC) that watchmaking schools across Europe teach.

Technical specifications

• Length: 47 mm
• Width: 16 mm
• Central bore: 5 mm
• Material: steel / steel
• Hardness: 58 HRC

When to use it

Use it whenever you notice slipping, marring or burrs on the tip of a screwdriver – typically every few dozen screws on modern stainless case-backs, or after any contact with a hardened part. It is the indispensable companion of a complete Bergeon-style screwdriver set, and lets you restore a worn blade in seconds rather than discarding it.

How to use it

1. Loosen the small clamping screw and slide the screwdriver shaft into the 5 mm central hole.
2. Adjust the projection of the blade so that only the tip and the bevel protrude from the body.
3. Tighten the clamping screw firmly but without forcing the threads.
4. Place the bevel flat on a fine sharpening stone (ideally 1000 to 3000 grit).
5. Move the assembly back and forth with light, even pressure, keeping the angle constant.
6. Turn the tool by 180° to grind the opposite face and obtain a symmetrical edge.
7. Wipe the blade, check the symmetry against the slot of a calibration screw, and degrease before use.

Quality and origin

This watchmaker tool is made of hardened steel for long-term resistance to abrasion. The 5 mm bore is precision-drilled so the screwdriver cannot wobble during grinding, which is essential to obtain a flat, parallel bevel. The compact 47 x 16 mm format slips into any tool roll alongside your loupes, tweezers and Bergeon screwdriver set.

Frequently asked questions

Which screwdrivers fit this tool?

Any screwdriver with a shaft up to 5 mm, which covers virtually all watchmaking sets from Bergeon and the major generic suppliers.

Which stone should I use?

A water stone or a diamond plate of 1000 to 3000 grit gives the best balance between speed and finish. Avoid coarse stones, which round the bevel.

How often should I sharpen a watchmaking screwdriver?

Inspect the tip under a 10x loupe after every service. As soon as the corners show wear or a microscopic burr, a quick pass on the stone restores cutting precision.