ETA 2671-242 Movement Cannon Pinion With Driving Wheel

Product Description

This is a genuine cannon pinion with integrated driving wheel designed for the ETA 2671 self-winding movement, part number 2671-242, Article 33. This combined component transmits power from the center wheel to the minute hand and drives the hour wheel for hour indication. As a core transmission component of the movement’s gear train, this product is genuine ETA, made in Switzerland, and brand new, making it the ideal replacement for worn original parts during service or repair.

Features & Function

Feature	Description
Compatible Movement	ETA 2671 self-winding mechanical movement
Part Number	2671-242
Article Number	33
Part Name	Cannon Pinion with Driving Wheel
Construction	Integrated cannon pinion and driving wheel
Core Function	Transmits power from center wheel to minute hand and drives the hour wheel
Material	High-strength steel, precision machined
Product Type	Genuine ETA part

Feature

Description

Compatible Movement

ETA 2671 self-winding mechanical movement

Part Number

2671-242

Article Number

Part Name

Cannon Pinion with Driving Wheel

Construction

Integrated cannon pinion and driving wheel

Core Function

Transmits power from center wheel to minute hand and drives the hour wheel

Material

High-strength steel, precision machined

Product Type

Genuine ETA part

Usage Instructions

Instruction	Details
Primary Use	As the cannon pinion assembly, drives the minute hand and hour hand for time display
Normal Function	The cannon pinion has a friction fit with the center wheel, ensuring smooth hand movement without slippage during time setting
Failure Symptoms	Worn cannon pinion causes: minute hand jumping during time setting, hand slippage, or inaccurate timekeeping
Friction Fit	Proper friction between cannon pinion and center wheel is critical – too loose causes slippage, too tight increases resistance

Instruction

Details

Primary Use

As the cannon pinion assembly, drives the minute hand and hour hand for time display

Normal Function

The cannon pinion has a friction fit with the center wheel, ensuring smooth hand movement without slippage during time setting

Failure Symptoms

Worn cannon pinion causes: minute hand jumping during time setting, hand slippage, or inaccurate timekeeping

Friction Fit

Proper friction between cannon pinion and center wheel is critical – too loose causes slippage, too tight increases resistance

Installation Instructions

Step	Instruction
1. Remove Hands	Use hand levers to carefully remove hour, minute, and seconds hands
2. Remove Dial	Loosen dial fixing screws and remove the dial
3. Remove Hour Wheel	Remove the hour wheel to access the cannon pinion assembly
4. Remove Old Cannon Pinion	Use a specialized tool to gently pull out the old cannon pinion (2671-242)
5. Cleaning	Clean the center wheel pivot and cannon pinion mounting area
6. Install New Cannon Pinion	Vertically align the new cannon pinion assembly with the center wheel pivot and press evenly into place
7. Lubrication	Apply specialized watch lubricant to the contact points between cannon pinion and center wheel – microscopic amount only
8. Testing	Reinstall hour wheel, dial, and hands; manually rotate crown to verify smooth hand movement

Step

Instruction

1. Remove Hands

Use hand levers to carefully remove hour, minute, and seconds hands

2. Remove Dial

Loosen dial fixing screws and remove the dial

3. Remove Hour Wheel

Remove the hour wheel to access the cannon pinion assembly

4. Remove Old Cannon Pinion

Use a specialized tool to gently pull out the old cannon pinion (2671-242)

5. Cleaning

Clean the center wheel pivot and cannon pinion mounting area

6. Install New Cannon Pinion

Vertically align the new cannon pinion assembly with the center wheel pivot and press evenly into place

7. Lubrication

Apply specialized watch lubricant to the contact points between cannon pinion and center wheel – microscopic amount only

8. Testing

Reinstall hour wheel, dial, and hands; manually rotate crown to verify smooth hand movement

Maintenance & Service Guide

Aspect	Guidance
Inspection Period	Check the friction fit and gear wear between cannon pinion and center wheel during each movement service
Wear Indicators	Signs of wear include: minute hand jumping during time setting, hand slippage, or loose feeling when setting time
Cleaning Method	Clean with isopropyl alcohol or specialized cleaning solution; do not soak for extended periods; ensure complete drying
Lubrication	Apply specialized lubricant to cannon pinion/center wheel contact points – microscopic amount; gear teeth typically require no lubrication
Replacement Interval	Replace immediately when wear or deformation is visible, otherwise damage to the hour wheel or center wheel may occur
Service Advice	ETA official recommendation: full movement service every 3-5 years

Aspect

Guidance

Inspection Period

Check the friction fit and gear wear between cannon pinion and center wheel during each movement service

Wear Indicators

Signs of wear include: minute hand jumping during time setting, hand slippage, or loose feeling when setting time

Cleaning Method

Clean with isopropyl alcohol or specialized cleaning solution; do not soak for extended periods; ensure complete drying

Lubrication

Apply specialized lubricant to cannon pinion/center wheel contact points – microscopic amount; gear teeth typically require no lubrication

Replacement Interval

Replace immediately when wear or deformation is visible, otherwise damage to the hour wheel or center wheel may occur

Service Advice

ETA official recommendation: full movement service every 3-5 years

FAQ

Q1: Which ETA movements use the 2671-242 cannon pinion?
A: The 2671-242 cannon pinion with driving wheel is specifically designed for the ETA 2671 automatic movement. It is also compatible with ETA 2671 derivatives. Do not use with ETA 2678 or other calibers.

Q2: What is the difference between the cannon pinion and the hour wheel?
A: The cannon pinion drives the minute hand and rotates once per hour. The hour wheel is driven by the driving wheel (integrated into this part) and rotates once every 12 hours to drive the hour hand.

Q3: What are the symptoms of a worn cannon pinion?
A: Worn cannon pinion symptoms include: the minute hand jumps or moves unevenly when setting the time, the hands slip when the crown is pulled, the time setting feels loose and imprecise, or the watch loses time due to reduced friction.

Q4: Can I install this cannon pinion myself?
A: This repair requires movement disassembly, proper lubrication, and precise alignment. If you have experience and proper tools (hand levers, hand press, oilers), you may attempt it. For beginners, professional installation by a watchmaker is strongly recommended.

Q5: Do I need to lubricate the cannon pinion?
A: Yes, the contact surface between the cannon pinion and the center wheel requires a microscopic amount of specialized watch lubricant (e.g., Moebius 9010). Do not over-lubricate, as excess oil can migrate to other parts of the movement.

Q6: Is this a genuine ETA part?
A: Yes, this is a genuine ETA part, made in Switzerland, and brand new. It is not a generic or aftermarket replacement.

Q7: What watches use the ETA 2671 movement?
A: The ETA 2671 is a common ladies’ automatic movement found in many Swiss watch brands including Tissot (Lady Heart, Lovely), Longines (DolceVita small models), Mido, Certina, and Hamilton.