How to make a stove from rims with your own hands: a complete guide

Creating a heating device from scrap materials is not only a way to save money, but also an opportunity to give a second life to used metal. A stove made from wheel rims, often called a “potbelly stove,” is one of the most popular solutions for heating garages, country houses and workshops. The design is characterized by high heat transfer and ease of manufacture, which makes it accessible even to those who have basic skills in working with metal.

The main advantage of such a homemade product is the use of thick-walled steel, which does not burn out for years with proper use. Wheels from trucks or cars have the ideal geometry to create a sealed combustion chamber. In this article we will analyze in detail the process of creating an effective heating device, paying special attention to the safety and technical nuances of welding.

Before you start cutting metal, you need to prepare all the necessary tools and consumables. High-quality preparation of the workplace and the availability of working equipment directly affect the final result and the safety of the technician. Ignoring the preparatory stage can lead to design failure or, worse, injury.

Selection of starting material and preparation of tools

The first step in creating a heating device is to find suitable disks. The best option is stamped steel wheels from trucks, since their wall thickness is ideal for high temperatures. Light alloy wheels should absolutely not be used: when heated, they can become deformed or even collapse, releasing toxic fumes. Metal thickness should be at least 5-8 millimeters to ensure the durability of the structure.

To work, you will need a standard set of welder and cutter. The main tool will be an angle grinder (grinder) with metal discs 1-1.2 mm thick. You also need a welding machine, preferably an inverter type, which provides a stable arc. Don’t forget about personal protective equipment: a welding mask, leggings and thick clothing made from natural fabrics.

• 🛠️ Angle grinder with a set of cutting and cleaning wheels.
• 🔥 Welding inverter and electrodes with a diameter of 3-4 mm (or wire for a semi-automatic machine).
• 📏 Tape measure, square, chalk or metal marker for marking.
• 🔨 Hammer, chisel and clamps for fixing parts during welding.

It is also important to prepare the material for the legs and firebox door. The legs can be made from scraps of fittings or corners, and for the door you will need sheet metal 3-4 mm thick. If you plan to make a stove with a water circuit, you will need an additional pipe for the heat exchanger. All metal surfaces must be cleaned of rust and old paint before starting work.

Structural design and drawings

The simplest and most effective design is a vertical oven consisting of two disks stacked on top of each other. A combustion chamber is formed between them, and a water tank or simply a flat cooking surface is installed on top. This arrangement provides good traction and uniform heat distribution. The height of the firebox is usually 40-50 cm, which is optimal for loading standard size firewood.

When designing, it is necessary to take into account the location of the blower and grate. The ash pit is located in the lower disk, where the ash falls and where combustion air comes from. Grate installed at the junction of the disks or slightly higher, separating the combustion chamber and the ash pan. The exact dimensions depend on the diameter of the existing disks, but the proportions must be strictly observed.

⚠️ Attention: When calculating the height of the chimney, keep in mind that it must be at least 3-4 meters from ground level to ensure stable draft. Insufficient pipe height will lead to smoke in the room.

For ease of use, you can provide two doors: one for loading fuel in the upper part and one for cleaning the ash pan at the bottom. The doors are hung on welded hinges. Sealing of joints is achieved by precisely adjusting the edges or using asbestos cord. Drawings can be found on the Internet or drawn yourself on a 1:1 scale on the floor.

Step-by-step instructions for making the case

The assembly process begins with preparing the disks. It is necessary to cut off the inner part of the disk (hub), leaving only the outer rim and the central part, if it does not interfere. To do this, a circle is marked along the inner diameter of the rim and cut out with a grinder. As a result, you should be left with two rings with a bottom (or without, if all excess is cut off). Often only the outer ring is left and the bottom is cut out from a separate sheet of metal.

The next stage is the creation of a combustion chamber. The two prepared rings are butt welded together. The seam must be continuous and airtight so that smoke does not escape through the walls. If the discs have different heights, they can be combined, but it is better to use the same elements for symmetry. A hole for the blower measuring approximately 20x10 cm is cut in the lower disk.

Next, the grate is manufactured and installed. It can be made from reinforcing bars welded to the inner walls of the disk at the level of the junction of two rings. The distance between the rods should be 1.5-2 cm so that the ash falls freely down and the coals remain in the firebox. An alternative is to use a pre-fabricated cast iron grate of suitable size.

The upper part of the furnace is covered with a metal sheet 5-6 mm thick. A hole is cut in the center of the sheet for the exit of flue gases. The diameter of the hole must correspond to the diameter of the chimney pipe (usually 100-110 mm). A pipe (a piece of pipe 15-20 cm long) is welded to this hole, onto which the chimney will be placed.

Installation of doors and fittings

For proper operation of the oven, sealed doors are required. They can be cut from sheet metal or use ready-made cast iron doors from old stoves. Homemade doors are cut to the size of the openings of the firebox and vent with a small margin (1-2 cm around the perimeter). The edges of the doors can be slightly beveled with a grinder at an angle of 45 degrees for a better fit.

The doors are fastened on hinges that are welded to the body and the door itself. It is important to ensure a tight fit. To do this, you can weld metal limiter plates to the inside of the door or use an asbestos cord as a seal. Locking mechanism can be made in the form of a simple valve or a rotary handle.

Door handles are made of reinforcement or wooden blocks (if they are located far from the direct heating zone). Wooden handles are convenient because they do not heat up, but they need to be changed periodically. It is better to make metal handles long and curved so that you can open the door with gloves.

Installation of a chimney and gas exhaust system

Efficient operation of the stove is impossible without a properly assembled chimney. The pipe must be metal, with a wall thickness of at least 2 mm. The optimal diameter is 100-120 mm. The chimney consists of several sections connected to each other. It is important to observe the direction of assembly: the upper pipe is placed on the lower one so that the condensate flows into the oven and not out.

It is better to make the first section of the pipe (above the stove) horizontal (“hog”) with a length of 1-1.5 meters. This allows additional heat to be released into the room, rather than flying straight into the chimney. However, the horizontal section should have a slight slope towards the furnace or vertical part to ensure traction. The vertical part is discharged through the roof or wall in compliance with fire safety regulations.

The passage of the chimney through combustible structures (roof, walls) must be insulated. For this, non-flammable material (basalt wool, expanded clay) and cutting boxes are used. A deflector or fungus must be installed on the top of the pipe to protect the inside of the stove from rain and snow.

First start and rules of safe operation

The first start-up of a new furnace is a stress test for all welds and connections. It is recommended to carry it out outdoors or in a well-ventilated area. Load a small amount of dry wood chips or paper to heat the structure and burn off any remaining oil, paint, and moisture from the metal. There may be smoke and an unpleasant odor - this is normal.

During operation, monitor the case temperature. Red-hot metal indicates overheating, which shortens the life of the stove. Adjust the combustion intensity using the blower damper. Ash must be removed regularly so that it does not block air access to the fuel.

⚠️ Attention: Never use gasoline, kerosene or other flammable liquids for kindling. This may result in a vapor explosion inside the firebox and serious burns.

To increase the heat capacity, some craftsmen line the stove with bricks or install metal screens around it. This allows you to accumulate heat and release it gradually after the wood burns out. You can also install a tank for heating water on the upper surface, turning the potbelly stove into a full-fledged heating boiler.