The idea of converting an old car wheel into a functional one spray gun may seem unusual, but in practice this is one of the most budget-friendly ways to get a tool for uniform application of paints and varnishes. This solution is especially relevant for owners of garages, car services or workshops, where parts are regularly required to be painted, but the purchase of professional equipment is impractical due to the high cost. In this article we will look not only technical side of the assembly, but also the nuances of selecting materials, setting pressure and operating safety.
The advantage of a homemade spray gun made from a wheel is that it versatility: the device is suitable for applying primer, paint, varnish and even anti-corrosion compounds, if you choose the right nozzle and adjust the air supply. However, it is important to understand that such a solution will not replace industrial models in terms of accuracy and performance, but for everyday tasks or one-time work it will be an excellent alternative. Next is a detailed analysis of each stage, from preparing the wheel to testing the finished tool.
Why a car wheel?
The choice of a car wheel as the basis for a spray gun is not accidental. Its design already contains the key elements necessary for the operation of a pneumatic tool:
- 🔄 Sealed chamber — acts as a receiver, accumulating compressed air and smoothing out pulsations during supply.
- 🛠️ Rugged housing — withstands high pressure (standard wheels are designed for 2–3 atm, which is enough for a spray gun).
- 🔧 Convenient nipple — allows you to quickly connect a compressor or pump to pump air.
In addition, an old wheel (for example from VAZ-2107 or GAZelle) can be found for free at a tire shop or bought for a symbolic amount at a disassembly site. And if you have a tire lying around in the garage with a damaged cord but an intact inner tube, this is an ideal option for refurbishment. The main thing is that the chamber does not have punctures and remains sealed.
For comparison: factory spray guns with a receiver of similar volume (20–40 liters) cost from 5 to 15 thousand rubles. A homemade device will cost 3–5 times less, and its functionality will not be inferior to budget models for home use.
Required materials and tools
To assemble a spray gun from a wheel, you will need a minimum set of components. Most of them can be found in the garage or can be purchased at your local auto parts and hardware store. Here's the full list:
| Component | Purpose | Where to get / price |
|---|---|---|
| Car wheel (with camera) | Main receiver body | Used - 0–500 ₽ (disassembly, tire fitting) |
| Spray nozzle (0.8–1.4 mm) | Formation of a spray torch | AliExpress, auto paint stores - 200–600 ₽ |
| Hose connection | Compressor connection | Pneumatic tool store - 100–300 ₽ |
| Pressure regulator with pressure gauge | Control and adjustment of outlet pressure | Ozone, Leroy Merlin — 500–1500 ₽ |
| High pressure hose (6–8 mm) | Air supply from compressor | Auto shop - 30–50 RUR/meter |
Additionally you may need:
- 🔨 Epoxy resin or sealant - for sealing joints.
- 🔧 Clamps and fittings - for attaching hoses.
- 🛠️ Drill with a set of drills - for making holes for the nozzle.
If you plan to use the spray gun to work with water-borne paints, add to list moisture-oil separator (cost ~800 ₽). It will protect the nozzle from clogging with condensate and extend the service life of the tool.
⚠️ Attention: Do not use a wheel with visible cracks on the tube or cord! Even microdamages can lead to rupture under pressure. Before assembly, be sure to check the tightness by immersing the inflated chamber in water - bubbles will indicate the location of the leak.
Step-by-step assembly instructions
The process of converting a wheel into a spray gun can be divided into 3 stages: preparing the base, installing the nozzle and connecting the pneumatics. Let's look at each step in detail.
1. Wheel preparation
Remove the tire from the rim, leaving only the tube. Wash it thoroughly with soapy water and dry. If there is any remaining sealant or dirt on the surface, remove it with acetone. Then:
- Pump up the camera to
1.5–2 atmand check for leaks (as described above). - Mark the location for installing the nozzle - optimally on the side surface, closer to the nipple.
- Drill a hole with a diameter corresponding to the size of the nozzle fitting (usually 6–8 mm).
2. Installation of nozzle and regulator
It is important to ensure the tightness of the connection. Algorithm of actions:
- Insert the nozzle fitting into the drilled hole, having previously applied anaerobic sealant.
- Secure the fitting on both sides of the chamber with nuts, using washers to evenly distribute the load.
- Connect to the fitting pressure regulator with a pressure gauge - this will allow you to accurately adjust the air supply.
3. Connection to compressor
Use high pressure hose for connecting the wheel nipple to the compressor. Make sure all fittings are tight. For reliability, you can use stainless steel clamps.
After assembly, check the tightness of the system again: inflate the wheel until 2 atm and apply soapy water to all joints. The absence of bubbles will confirm that there are no leaks.
Checking the tightness of the chamber|Reliability of fastening the nozzle|Connecting the pressure regulator|Test for leaks with a soap solution|Checking the operation of the compressor-->
Setting up and testing the spray gun
Correct setting is the key to quality spray. Let's start with preparing the paint:
- 🎨 Viscosity: For waterborne paints -
18–22 secusing a VZ-246 viscometer. For nitro paints -14–16 sec. - 🔍 Filtration: Strain the paint through nylon stocking or a special filter to avoid nozzle clogging.
Next, adjust the pressure:
- Install on regulator
1.5–2 atm(for primer can be increased to2.5 atm). - Adjust spray torch by rotating the nozzle: wide for large surfaces, narrow for details.
- Test spray the unwanted part while holding the gun at a distance
15–20 cmfrom the surface.
Pay attention to the shape of the torch:
- ✅ Perfect torch - a uniform oval without “tails”.
- ❌ Wrong torch:
- 🔴 "Horns" on the sides - pressure is too high or the nozzle is clogged.
- 🔴 Uneven splashes — the paint is too thick or the pressure is low.
⚠️ Attention: If paint spits out in large drops when spraying, check moisture-oil separator — most likely, condensation has accumulated in the system. Drain it through the compressor drain valve.
For testing, use water instead of paint - this will help you fine-tune the pressure setting and the shape of the torch without the risk of clogging the nozzle with pigments.
Maintenance and care of a homemade spray gun
To make your tool last longer, follow these simple rules:
After each use:
- 🧼 Rinse the nozzle and reservoir (if equipped) solvent 646 or acetone.
- 💨 Blow the hoses with compressed air to remove any remaining paint.
- 🔧 Drain the condensate from the receiver (wheel chamber) through the nipple.
Once a month:
- 🛠️ Check the tightness of all connections.
- 🔍 Inspect the camera for microcracks.
- 🔄 Lubricate the threaded connections silicone grease.
If the nozzle begins to clog more often than usual, this is a signal that replacement is necessary. moisture-oil separator or an inlet filter. It is also recommended to disassemble the pressure regulator and clean it of dust every six months.
Store the spray gun in a dry place, hanging the wheel on a hook - this will prevent the chamber from deforming. Avoid direct sunlight, which can accelerate the aging of rubber.
What to do if the spray gun stops holding pressure?
If a tire goes flat quickly, the reason may be:
1. Damaged camera — check for punctures with a soap solution.
2. Worn nipple — replace it with a new one (cost ~50 ₽).
3. Loose connections — tighten the nuts and clamps, add sealant.
If the problem is with the camera, it can be temporarily repaired vulcanization, but it’s better to replace it with a new one (price ~300–500 RUR).
Safety when working with a homemade spray gun
Even low pressure of 2–3 atm can be dangerous if handled incorrectly. Follow these rules:
- 👓 Respiratory protection: Use respirator with A2P2 filter (from 500 ₽). Paints contain toxic volatile compounds.
- 🧤 Skin protection: Put on nitrile gloves and workwear. Nitro paints corrode the skin.
- 🔥 Fire safety: Do not smoke or work near open flames - paint fumes are explosive.
- 🚫 Pressure: Do not exceed
3 atm— standard cameras are not designed for heavy loads.
Pay special attention grounding compressor and metal parts of the spray gun. Static electricity that builds up when spraying can cause a spark and ignite the vapor. If your garage floor is concrete, use antistatic mat.
When working for a long time (more than 1 hour), take breaks every 20-30 minutes to avoid overheating of the compressor. Also monitor the temperature of the wheel chamber - if it becomes hot, let the tool cool down.
⚠️ Attention: Never point the spray gun at yourself or other people, even for testing! Pressurized air may cause injury to eyes or skin. Always check the spray direction from a safe distance.
Comparison with factory spray guns: pros and cons
A homemade spray gun made from a wheel is a compromise solution that is not suitable for all tasks. Let's compare it with factory counterparts:
| Parameter | Homemade (from a wheel) | Budget factory (up to 5000 ₽) | Professional (from 10,000 ₽) |
|---|---|---|---|
| Cost | 500–2000 ₽ | 3000–5000 ₽ | 10 000–50 000 ₽ |
| Spray quality | Average (depending on setting) | good | Excellent (torch adjustment, pressure) |
| Performance | Low (small receiver volume) | Average | High (large receiver, powerful compressor) |
| Versatility | Limited (liquid materials only) | Wide range of colors | Any paintwork materials, including two-component ones |
| Reliability | Depends on build quality | Warranty 1–2 years | Warranty 3–5 years, after-sales service |
As can be seen from the table, the homemade version is inferior to the factory version in most respects, but wins in price and ease of repair. It is advisable to use it for:
- 🔧 Painting small parts (rims, bumpers, interior elements).
- 🚗 Applying primer or anti-gravel.
- 🎨 Creative projects (painting, decor).
For professional painting of a body or large surfaces, it is better to invest in a factory spray gun with a system HVLP (High Volume Low Pressure), which provides minimal fog and high paint transfer.
A homemade spray gun made from a wheel is justified for one-time work or small tasks. For regular use, it is better to choose a factory model with a receiver capacity of 24 liters or more.
FAQ: Frequently asked questions about the wheel spray gun
Is it possible to use a tubeless wheel for a spray gun?
Technically yes, but it is less reliable. Tubeless tires do not have a separate tube, so sealing depends on the condition of the cord and beads. If the wheel is old or has microcracks, the risk of bursting under pressure increases. It is better to use a classic inner tube from a cargo bike or motorcycle - it is thicker and more durable.
Which nozzle is better to choose for painting a car?
The optimal nozzle for base paint and varnish 1.2–1.4 mm. For primer - 1.5–1.7 mm. If you plan to work with metallics or mother of pearl, take the nozzle 1.0–1.2 mm for a finer spray. Brands: DeVilbiss, SATA (the originals are expensive, but there are Chinese analogues on AliExpress).
How to increase the volume of the receiver for more stable operation?
You can connect a second camera in parallel via tee. For example, connect a wheel from a car with an inner tube from a truck (volume 20–30 liters). The main thing is to equalize the pressure in both chambers and install a common regulator. Also check that the total pressure does not exceed 2.5 atm.
How to replace the compressor if there is none?
Temporary alternative - car pump with a pressure gauge or even foot pump for inflating wheels. However, keep in mind that you will have to constantly pump up the air manually, since the volume of the chamber is limited. For continuous operation, you still need a compressor with a capacity of 200 l/min.
Is it possible to paint furniture or walls with this spray gun?
Yes, but with reservations. Suitable for furniture if used waterborne paints (for example, Tikkurila or Dulux) and nozzle 0.8–1.0 mm. Best choice for walls air type paint sprayer (for example, Wagner W 550), since the homemade version gives a less uniform layer on large surfaces.