China Make 5537 Rolex Back Case Opener Set

Product Description

This is a China-made 5537 model Rolex case back opener set, specifically designed for opening and closing screw-down waterproof case backs on Rolex, Tudor, and other similar watch brands. The set includes a high-strength wrench handle and 6 precision-machined grooved dies (chucks) of various diameters, which securely engage the notches on the case back to easily unscrew or tighten it using leverage.

It is an essential professional tool for watchmakers and hobbyists for battery replacement or movement service.

Features & Function

Feature	Description
Model	5537
Origin	China Made
Compatible Brands	Rolex, Tudor, and similar grooved case back watches
Main Function	Open and close waterproof screw-down watch case backs
Handle Material	High-strength metal with ergonomic design for ample torque
Die Material	Precision-machined metal grooved chucks
Number of Dies	6 pieces
Die Sizes	18.5mm, 20.2mm, 22.5mm, 26.5mm, 28.3mm, 29.5mm
Extended Sizes	Some sets include an additional 36.5mm size

Feature

Description

Model

5537

Origin

China Made

Compatible Brands

Rolex, Tudor, and similar grooved case back watches

Main Function

Open and close waterproof screw-down watch case backs

Handle Material

High-strength metal with ergonomic design for ample torque

Die Material

Precision-machined metal grooved chucks

Number of Dies

6 pieces

Die Sizes

18.5mm, 20.2mm, 22.5mm, 26.5mm, 28.3mm, 29.5mm

Extended Sizes

Some sets include an additional 36.5mm size

Usage Instructions

Step	Instruction
1. Preparation	Place the watch face-down on a soft, non-slip mat in a clean, dust-free workspace
2. Clean Case Back	Wipe the case back edge with a soft cloth to remove debris, ensuring proper tool engagement
3. Select Die	Choose the die that best matches the diameter of the case back grooves. It should fit snugly without play
4. Install Die	Insert the selected die into the head of the wrench handle until securely locked
5. Engage Case Back	Align the die’s teeth with the case back notches, press down vertically to ensure full engagement
6. Open Case Back	Hold the handle and apply steady, even pressure counter-clockwise to loosen the case back
7. Close Case Back	To reinstall, hand-thread clockwise first, then use the tool to gently tighten clockwise. Do not over-tighten

Step

Instruction

1. Preparation

Place the watch face-down on a soft, non-slip mat in a clean, dust-free workspace

2. Clean Case Back

Wipe the case back edge with a soft cloth to remove debris, ensuring proper tool engagement

3. Select Die

Choose the die that best matches the diameter of the case back grooves. It should fit snugly without play

4. Install Die

Insert the selected die into the head of the wrench handle until securely locked

5. Engage Case Back

Align the die’s teeth with the case back notches, press down vertically to ensure full engagement

6. Open Case Back

Hold the handle and apply steady, even pressure counter-clockwise to loosen the case back

7. Close Case Back

To reinstall, hand-thread clockwise first, then use the tool to gently tighten clockwise. Do not over-tighten

Important Notes

Size Matching is Critical

Select the die that perfectly matches the groove diameter. Mismatched sizes will slip and severely scratch the case back

Apply Even Pressure

Apply steady, even pressure when opening. Avoid jerky or excessive force to prevent slippage and injury

Protect the Crystal

Place a protective film or soft cloth over the crystal to prevent scratches in case of accidental slips

Compatible Case Back Type

This tool is designed only for screw-down case backs, NOT for snap-off/press-fit case backs

Maintenance & Service Guide

Aspect	Guidance
Cleaning	After use, wipe the handle and dies with a dry cloth to remove metal shavings and oil residue
Rust Prevention	For long-term storage, apply a light coat of anti-rust oil on metal parts and store in a dry place
Die Inspection	Regularly check die teeth for wear or deformation. Replace worn dies to maintain grip
Storage	Store in the original case to prevent loss of dies and protect from impact damage

Aspect

Guidance

Cleaning

After use, wipe the handle and dies with a dry cloth to remove metal shavings and oil residue

Rust Prevention

For long-term storage, apply a light coat of anti-rust oil on metal parts and store in a dry place

Die Inspection

Regularly check die teeth for wear or deformation. Replace worn dies to maintain grip

Storage

Store in the original case to prevent loss of dies and protect from impact damage

FAQ

Q1: Is this tool compatible with all Rolex models?
A: It is compatible with most modern Rolex Oyster case models that feature a screw-down case back with standard grooves. However, some vintage or special models may require specific dies. The 29.5mm die typically fits most Submariner and GMT-Master models.

Q2: What are the included die sizes?
A: The standard set includes 6 sizes: 18.5mm, 20.2mm, 22.5mm, 26.5mm, 28.3mm, and 29.5mm. Some versions also include a 36.5mm die for larger case backs.

Q3: Can this tool close the case back as well?
A: Yes, it can be used to both open and close screw-down case backs. However, be careful not to over-tighten when closing, as this can damage the threads or deform the gasket.

Q4: What is the difference between this China-made 5537 and the Swiss Bergeon 5537?
A: The Bergeon 5537 is the original Swiss-made professional tool with premium fit and finish. This China-made version is a more affordable alternative that offers similar functionality, suitable for hobbyists and occasional use.

Q5: Do I need to remove the bracelet before using this tool?
A: It is recommended to either remove the bracelet or position it out of the way, as the bracelet can interfere with the tool’s grip on the case back.

Q6: Why is the case back not turning?
A: Possible reasons: (1) Wrong die size selected – ensure snug fit; (2) Tool not fully engaged – press down firmly; (3) Case back is seized – apply penetrating oil or seek professional help; (4) Turning the wrong direction – turn counter-clockwise to open.