Forge (Tool)

Forge. It is a tool that consists of a container where the coal is placed (hard coal , or stone coal , that is, natural coal, not wood, although this is made of hard wood also works), a crank connected to some pallets (type blades) inside a piece of sheet metal that when turning the crank controlled air is sent so that the coal ignites and / or is revived to soften the iron that you want to work.


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  • 1 Origin
  • 2 General
  • 3 Characteristics of the forge
  • 4 Systems for stoking coal
    • 1 Bellows system
    • 2 Blade system
  • 5 Raw material used
  • 6 Source


Formerly they used the cheap and effective bellows system. An apparatus consisting of 2 teardrop-shaped boards joined by a flexible leather.


Few artisans use the forge today. There are gas, and appliances that run on oil, among others, faster and more efficient.

Forge characteristics

The forge maintains heat for the necessary time, raises temperature quickly and especially with the minimum cost of money. Gas, especially natural gas, has more calories than coal, but the one that is obtained is gas extracted from petroleum and does not have the same calories as natural gas.

The forge normally has a tray-type space (square or round) between 7 and 10 cm high with a hole in the middle of the floor where the coal is placed (hard coal or industrial, stone coal). This hole usually has a mesh so that the smaller stones of the coal do not fall into the container that is immediately where the waste is also collected.

This tray and its hole in the middle have a sheet metal tube below the floor through which forced air travels to the coal, which is the only outlet. A vane system sends air to a point below where the coal is located.

Systems for stoking coal

To revive the coal, various systems are used, among them are: the bellows system and the blade system .

Bellows system

It is a system as old as man himself, (it was used to give air in stoves in the past) to send air to the coal and fan the fire; It is a rustic system although it is also effective.

Blade system

The blades are attached to the top shaft “F” are the blades enclosed within a round box with a diameter almost exact to the total diameter of the blades (including the shaft). As the blades are straight, the air wants to go out where it is pushed, that is, from the front (see the red arrows). In the case of conventional “V” blades (airplane propeller type). Air is directed backwards or forwards although this model takes up too much space. “G” is the spin of the blades.

Raw material used

The forge uses coal of coal, what was previously called “coke” or industrial coal that after igniting lasts a long time burning and raising high focused temperatures in an area. Not having to use electrical power makes it versatile to use in locations away from the power supply.


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