How do Automatic Watches Store Energy? - Everything You Need to Know

Introduction

Apart from just a time-telling machine, watches are a symbol of an impressive personality. From the very beginning until this day, watches have carried a great innovation. We have observed significant development in this department, offering a variety of watches. If we keep an eye on the journey of traditional watches, the automatic watches still stand on top. They are famous for operating without batteries and generating power themselves. Similarly, their premium looks, high build quality, and suitability on the wrist have no counterpart.

But have you ever thought about how these automatic watches operate? They don’t carry batteries, so how do they store energy to operate? In today’s guide, we will go through the complete working mechanism of the automatic watch movement. 

Automatic mechanical watch movement

What is an Automatic Watch?

An Automatic watch is a mechanical watch type that operates based on the wearer’s wrist movement. This movement or motion winds the main spring that stores and transfers energy to other components. This watch is also known as a “self-winding watch”. 

Instead of relying on batteries, the automatic watches create and store energy using the mechanical movement of their parts. These parts include some highlighted names, such as gear train, escapement, and balance wheel. Their contribution helps to keep the watch ticking.

Core Features

  • Automatic watches are self-winding and synced with wrist motion.
  • Automatic watch movement doesn’t carry batteries to store energy.
  • Automatic watches feature a backup of around 80 hours without movement.
  • Automatic watches are durable, reliable, and longlasting machines.
  • Automatic mechanical watches are a symbol of an elite standard.
  • Automatic watches showing the internal movement (transparent).

Famous Brands

  • Patek Philippe
  • Vacheron Constantin
  • Audemars Piguet
  • Rolex
  • Omega

How do Automatic Watches Store Energy?

Automatic Watches store energy based on three core steps. The detail for each step is mentioned below

Rotor Energy Generattion

1: Energy Generation

The energy generation process starts in an automatic watch when a rotor responds to the movement of the wrist. This movement produces and converts the kinetic energy into rotational energy. The rotor has the ability to rotate 360 degrees parallel to the wrist motion. It is designed to detect even a tiny movement to generate more energy. Moreover, the energy generation process relies on the movement of the wrist; the more the wrist moves, the more stable the energy is generated.

2: Energy Transfer

When the energy generation process is completed, it is transferred to the mainspring passing through the barrel. A series of multiple gears is involved in this process to undergo a successful transfer. The gear train implements the gear reduction system, decreasing the speed and increasing the torque. Following this mechanism, it is ensured that a stable and balanced energy is being transferred towards the mainspring. Similarly, the ratchet system keeps the flow in one direction to avoid energy loss.

3: Energy Storage & Regulation

Here, the credit for energy Storage goes to mainspring. It is a striped coil made up of metal inside the barrel to store and release the energy. The storing and releasing of energy is linked to the winding and unwinding procedure. When the mainspring winds, it stores energy and vice versa. Regarding the power reserve, the automatic mechanical watch can remain operational for about 80 hours when not in use. It is the whole process of physical energy instead of electrical energy.

Mechanical Watch Parts

Understanding the Components Involved

a: Rotor

  • A rotor is a half-circular, tiny component that moves or rotates according to wrist motion. On one end, it is connected with the mainspring through a series of gears. The movement of the wrist and rotor creates the energy, which is then stored in the mainspring.

b: Mainspring

  • In other words, the mainspring is known to be the energy Storage unit of automatic watches. The mainspring lies inside a barrel and operates based on the wind/unwind principle. When it winds, the energy is stored, and when the mainspring unwinds, the energy is released.

c: Gear Train

  • As the name indicates, the gear train is a combination of multiple gears that are linked to the other mechanical parts of an automatic watch. It shifts the energy received from the mainspring to the escapement and ensures the efficiency of the functions.

d: Escapement

  • Escapement is synchronized with the balance wheel in a mechanical automatic watch movement. The energy that comes from the gear train is utilized to improve the time accuracy in the escapement. Then transfers the energy to the balance wheel. It further involves an escape wheel, a pallet fork, and an impulse jewel.

e: Balance Wheel

  • A balance wheel in an automatic mechanical watch controls the rate of oscillation back and forth. It takes the energy transferred by escapement and divides it appropriately. The ratio of the balance wheel is measured in VPH (vibrations per hour).

Maintaining Your Automatic Watch

  • Try to wear the automatic watch to keep it operational regularly.
  • If you have more than one automatic watch, prefer using a manual winder.
  • Keep the automatic watches away from magnets, as the movement can be disturbed.
  • Avoid shocks and putting extra pressure on automatic watches to avoid damage.
  • Clean and service your automatic watch periodically.
Benefits of Automatic Watches

Benefits of Automatic Watches

  • These watches operate without any type of battery or electrical power.
  • These watches are based on a self-winding mechanism.
  • These watches offer a higher resale value.
  • These watches feature an analog display that looks luxurious.

Concluding Remarks

A tremendous amount of engineering is involved in the operations of an automatic mechanical watch. The process starts from wrist motion to energy generation, and ends up in energy Storage to energy regulation. At the end, it ensures presenting an accurate timekeeping. One can’t deny the solid contribution of mainspring, gear train, escapement, and balance wheel. Other than that, the backup time is also more than enough to keep the watch operational if you don’t wear it for around 3 days.

Well, when it comes to the matter of getting high-quality watch repair tools, watch movement parts, and other watch parts and accessories. Soflypart stands tall among all, offering its quality products, fulfilling the needs of watch enthusiasts. Do check the related products on our platform for more information.

FAQs

Q1: Does an automatic watch work without a rotor?

A: No, an automatic watch will not work without a rotor, as it is the key component to generate the energy to power up the watch. 

Q2: What if the automatic watch remained unoperational for a week?

A: If the watch remains unoperational for more than 80 hours, it will stop working. One needs to turn the crown multiple times to restart its operations.

Q3: What does the power reserve relate to in an automatic watch?

A: It relates to the backup time in an automatic watch without the wrist motion. Here comes the contribution of the mainspring, which determines how effectively it stores and utilizes the energy.