Bergeon 6918/6919 Turning And Removing Studs Tool

Product Description

This is a set of two precision tools – Bergeon 6918 and Bergeon 6919 – designed specifically for the Etachron regulating system found on many ETA calibers. The 6918 is used for turning the hairspring stud to center the balance spring, while the 6919 is the correct tool to safely press out and reinsert the Etachron stud from its holder. Both tools feature hardened stainless steel tips and ergonomic synthetic handles, allowing delicate manipulation without damaging the hairspring.

This product is genuine Bergeon, made in Switzerland, and brand new in original packing.

Features & Function

Model	Core Function	Technical Features
6918	Turns the hairspring stud to center the balance spring	• Hardened stainless steel tip (54 HRC) • Synthetic handle for comfortable grip • Specifically for Etachron stud adjustment
6919	Presses out and reinserts the Etachron stud from its holder	• Hardened stainless steel tip (54 HRC) • Synthetic handle for comfortable grip • Specifically for Etachron stud removal

Model

Core Function

Technical Features

6918

Turns the hairspring stud to center the balance spring

• Hardened stainless steel tip (54 HRC)
• Synthetic handle for comfortable grip
• Specifically for Etachron stud adjustment

6919

Presses out and reinserts the Etachron stud from its holder

• Hardened stainless steel tip (54 HRC)
• Synthetic handle for comfortable grip
• Specifically for Etachron stud removal

Usage Instructions

Step	Instruction
6918 Turning Tool	Insert the tool tip into the slot of the Etachron stud and rotate gently to center the hairspring between the regulating pins – ensures optimal performance.
6919 Removal Tool	Carefully insert the forked tip between the stud support and the regulator index. Once engaged, apply gentle, even pressure to push the stud out of its slit.
Reinsertion	After removal, press the stud back into its holder (snap-fit). It is recommended to perform this with the balance cock secured in its working position.
Work Environment	Recommended to work under magnification with stable lighting for precise manipulation.

Step

Instruction

6918 Turning Tool

Insert the tool tip into the slot of the Etachron stud and rotate gently to center the hairspring between the regulating pins – ensures optimal performance.

6919 Removal Tool

Carefully insert the forked tip between the stud support and the regulator index. Once engaged, apply gentle, even pressure to push the stud out of its slit.

Reinsertion

After removal, press the stud back into its holder (snap-fit). It is recommended to perform this with the balance cock secured in its working position.

Work Environment

Recommended to work under magnification with stable lighting for precise manipulation.

Important Notes

Precision Handling The stud fits tightly in its holder. Use small movements and light force – ensure the tool is fully engaged before applying steady pressure.

Know Your System Before adjusting, thoroughly understand the Etachron system‘s construction and operating principles to avoid improper manipulation.

Avoid Damage Never pry or force a stuck stud – this may break the hairspring or damage the balance cock.

Cleaning After each use, wipe the tool tips with a soft cloth to remove oil and debris. Store in a dry, dust-free place.

Professional Advice If inexperienced, have the adjustment performed by a qualified watchmaker.

Maintenance & Service Guide

Aspect	Guidance
Cleaning	After each use, wipe the tips with a soft cloth. Keep dry and store in a dust-free case.
Impact Protection	Avoid dropping or subjecting these precision tools to strong impacts – tips may deform or break.
Inspection	Inspect tips for bending, wear, or deformation before each use. Do not use if damaged.
Storage	Store in original packing or a dedicated tool case to prevent contact with other tools.
Replacement	Replace if tips are severely worn or deformed.

Aspect

Guidance

Cleaning

After each use, wipe the tips with a soft cloth. Keep dry and store in a dust-free case.

Impact Protection

Avoid dropping or subjecting these precision tools to strong impacts – tips may deform or break.

Inspection

Inspect tips for bending, wear, or deformation before each use. Do not use if damaged.

Storage

Store in original packing or a dedicated tool case to prevent contact with other tools.

Replacement

Replace if tips are severely worn or deformed.

FAQ

Q1:Can I buy only one of the Bergeon 6918 or 6919 tools?
A: They have different functions: 6918 turns the stud for adjustment; 6919 removes/reinserts the stud. For centering adjustment only, 6918 alone may suffice. For removing the stud for cleaning or replacement, 6919 is required. The set is more practical.

Q2:The stud feels very tight when using the 6919 – what should I do?
A: The fit is intentionally tight. Ensure the fork of the 6919 is fully inserted between the stud support and the regulator. Then apply slow, even pressure (not a prying motion) to push the stud out. If done correctly, the stud should come out cleanly.

Q3:Can I use another tool instead of the 6918 to turn the Etachron stud?
A: Not recommended. The 6918 tip is specifically shaped to fit the Etachron stud slot. Using an incorrect tool may slip or damage the stud. For precision components, use the dedicated tool.

Q4:How should I clean the tool tips? Can I use alcohol?
A: A small amount of isopropyl alcohol can be used to wipe the tips, then dry thoroughly. Avoid prolonged soaking to prevent handle material damage. For daily maintenance, a soft cloth is sufficient.