JLC Jaeger-LeCoultre Caliber 842 Cannon Pinion 1.85mm

Quantity	Discount (%)	Price
1 - 2	—	$155.00
3 - 4	5 %	$147.25
5 - 9	7 %	$144.15
10 - 14	10 %	$139.50
15+	15 %	$131.75

Quantity

Discount (%)

Price

1 - 2

—

$155.00

3 - 4

5 %

$147.25

5 - 9

7 %

$144.15

10 - 14

10 %

$139.50

15+

15 %

$131.75

Product Description

This is a genuine Jaeger‑LeCoultre cannon pinion for Caliber 842 manual‑winding movement, with a height specification of 1.85mm, Swiss‑made. The cannon pinion is a core component of the motion work, mounted on the center wheel. Through a friction fit, it drives the minute hand and transmits power to the hour wheel, ensuring synchronized motion of the hour and minute hands. This original factory part is the ideal replacement for watchmakers to restore proper hand‑setting function and hand synchronization when servicing the Caliber 842 movement.

Key Features

Genuine JLC Part – Swiss factory‑original for Caliber 842, not a copy.

Motion Work Core – Drives the minute hand and transmits power to the hour wheel for synchronized hand motion.

Precise Height 1.85mm – Strictly meets factory dimensions for correct fit with other movement parts.

Friction Fit Design – Provides proper damping for smooth hand‑setting and slip‑free running.

Essential for Service – Replace when hands feel loose, slip when setting, or become asynchronous.

Specifications

Parameter	Details
Part Name	Cannon Pinion
Compatible Movement	Jaeger‑LeCoultre Caliber 842 manual‑winding
Height Specification	1.85 mm
Type	Genuine original
Function	Drives the minute hand, transmits power to the hour wheel
Origin	Switzerland
Condition	Brand new, genuine

Applications

Jaeger‑LeCoultre Caliber 842 manual‑winding movement (common in Reverso and classic dress watches).
Repair of loose or slipping minute hand, or asynchronous hour/minute hands when setting time.
Replacement of worn or incorrectly tensioned cannon pinions during movement service.

Frequently Asked Questions

1. Is this a genuine Jaeger‑LeCoultre cannon pinion?
Yes. It is a Swiss factory‑original part for Caliber 842, not a copy.

2. What are the symptoms of a damaged cannon pinion?
Symptoms: the minute hand feels loose with little resistance when setting; inaccurate minute hand position after setting; the minute hand slips during operation, causing timekeeping errors; hour and minute hands become asynchronous.

3. What does “height 1.85mm” mean?
This is the overall height of the cannon pinion, ensuring precise vertical positioning within the movement to avoid interference with bridges or other wheels. Different calibers have different heights; this is specific to Caliber 842.

4. What should I pay attention to during installation?
The cannon pinion is pressed onto the center wheel arbor. Ensure it is seated vertically without tilting. Apply a tiny amount of dedicated grease to the arbor, but do not over‑lubricate as it may affect the friction fit. Professional installation is recommended.

5. Does this part fit other JLC calibers like Caliber 844?
Different calibers may have different cannon pinion dimensions. Caliber 844 is also manual‑wind, but dimensions may differ. Verify with the parts diagram.