Product · Bosch Professional
Bosch GAS 18V-12 MC: cordless M class on one 18 V pack
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The Bosch GAS 18V-12 MC brings M class dust extraction to the 18 V battery platform. It runs on a single Bosch 18 V pack, uses a BITURBO brushless motor and pairs with an Auto-Start tag so it switches on with your cordless tool. It suits electricians, fitters and kitchen installers who drill and cut in occupied homes or rooms without a nearby socket.
- Dust class
- M
- Capacity
- Not stated
- Power
- 18 V battery
- Tool start
- Yes, Auto-Start tag
- Filter cleaning
- Semi automatic
In its favour
- M class with a HEPA filter, powered by a single 18 V Bosch battery.
- Pairing the Auto-Start tag starts and stops the extractor with your tool.
- Includes a GCT 30-42 adaptor, 3 m antistatic hose and carrying strap.
Good to know
- The listing does not state the container capacity.
- An 18 V battery and charger are not included.
Our take
M class on a battery
Bosch describes this as a powerful and compact BITURBO M class extractor that needs just one 18 V battery. A HEPA filter rated M class is included. The listing also mentions cyclone technology and an enlarged filter for superior suction.
Running on a battery means no trailing cable and no search for a socket, which is a real advantage on first fix or in finished rooms.
Auto-Start tag
Pair the Auto-Start tag and the extractor starts and stops automatically when you operate your tool. That works with cordless tools that have no power socket to plug into, solving one of the main drawbacks of using cordless kit with an extractor. Hands free starting keeps extraction running for every cut or hole.
Filter cleaning and pick up
The listing describes semi automatic filter cleaning and wet and dry use. Semi automatic means you trigger the cleaning yourself, but it is quicker than removing the filter.
Wet pick up on a battery extractor is useful for small spills or water from a core bit, without having to fetch a mains vacuum. For dusty jobs, cleaning the filter between rooms helps keep suction where it should be.
What comes with it
Bosch includes the GCT 30-42 adaptor, three rubber bands, a 3 m antistatic hose, the M class HEPA filter, a nozzle adaptor, crevice nozzle, elbow pipe, brush, disposable bag and carrying strap. The listed weight is 8 kg. Container capacity is not stated, and no battery or charger is included.
Where it fits
For all day sanding or chasing, a mains unit such as the Bosch GAS 35 M AFC or Trend T35A has more capacity and continuous suction. The GAS 18V-12 MC is for short, frequent jobs where portability matters more than drum size.
Battery runtime is not stated in the listing, so it is worth having a second pack charged if you plan to extract for a full morning.
Verdict
Buy the GAS 18V-12 MC if you already use Bosch 18 V tools and need M class extraction for drilling and cutting in places without power. For long dusty tasks, a mains extractor such as the Bosch GAS 35 M AFC or Trend T35A will run longer and hold more.
Compared with alternatives in: Best dust extractors for power tools
Amazon listing title: Bosch Professional 18V System Cordless Dust Extractor Gas 18V-12 MC (M-Class dust Protection, HEPA Filter, incl. GCT 30-42, 3X Flexible Rubber Band, Multiple Accessories, Without Battery/Charger)