Tips for Building
80 dB(A) sound power: the Basic 220-24 OF Silent is by far the quietest machine in the comparison. Metabo measures its delivery at 6.4 bar instead of 7, which prevents scoring it against the others.
What its figures are worth
- Air delivered at 7 barnot published by the maker
- Price per delivered l/mincannot be calculated from the published figures
- Sound power LwA 20 %80 dB(A) · 10/10
- Weight 15 %25 kg · 8/10
Not scored: only 35% of the scale is covered, or the main criterion is missing. Below 60 percent, a score would reward the maker who publishes least. Weighting: Air delivered at 7 bar 40 %, Price per delivered l/min 25 %, Sound power LwA 20 %, Weight 15 %.
Choose it if
- Working indoors, early in the morning or near neighbours.
- An oil-free 24 litre on wheels, with a handle.
Skip it if
- Comparing its delivery: it is not published at 7 bar.
- Weight: 25 kg for 24 litres, more than an HC26.
Published specifications
| Specification | Stated value |
|---|---|
| Air delivered at 7 bar | not published on the page we consulted |
| Air intake | 220 l/min |
| Maximum pressure | 8 bar |
| Tank | 24 L |
| Motor | 1.1 kW |
| Pump | Oil-free, twin cylinder |
| Sound power LwA | 80 dB(A) |
| Sound pressure | 60 dB(A), distance not stated |
| Weight | 25 kg |
Before you connect the first tool
- Never point the blow gun at skin. Not to dust off clothes you are wearing, not as a joke. Compressed air can enter the skin and cause a serious injury.
- Eye and hearing protection. A blow gun throws chips and dust at eye level, and most of these machines exceed 90 dB(A) of sound power.
- The tool's pressure, not the tank's. Set the regulator to the pressure stated on the tool. Never adjust the pressure switch or the safety valve.
- Drain the tank. Condensed water collects at the bottom and corrodes the steel from inside. Open the drain valve after use, with the tank depressurised as the manual describes.
- A long hose rather than a long extension lead. A lead that is too long or too thin drops the voltage when the motor starts. Manuals advise bringing the compressor close to the socket and running a longer air hose.
What the maker shows
Frequently asked questions
Where does this machine's score come from?
It is calculated, not awarded. Five measurable criteria are weighted, and each value is mapped onto a scale relative to the other machines in the comparison. For this machine, 35% of the scale could be applied: criteria the maker does not publish drop out rather than being replaced by an estimate.
Which tank size, 24 or 50 litres?
The tank is a reserve, it does not increase air delivery. A 24 litre machine is enough for a nailer, a blow gun and inflating, and it is easy to store and carry. A 50 litre tank lets the motor rest longer between cycles, which matters for spray painting or long sessions.
Oil-free or oil-lubricated?
An oil-free compressor needs no oil changes and can lie flat in a car boot. An oil-lubricated one needs its oil level checked and travels upright. In this comparison, only the Scheppach HC26 is lubricated.