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3931A Airsweep Vacuum

Bosch - 3931A Airsweep Vacuum

This new wet/dry shop vacuum from Bosch includes an auto-start feature and it lets you dial in the operating amperage

$400 (As of 7/1/2007)

(3 user reviews) Write a Review

Editor's Review: Tool Test: Shop Vacuums

by Roland Johnson

review date: July 1, 2007

Bosch’s new 3931A shop vacuum is easy on the ears and has several dynamic features that make it a great shop helper.

The vacuum’s auto-start feature fires up the vacuum and a tool plugged into it simultaneously (top left) and shuts down seven seconds after you turn off the tool, enough time to clear the dust-collection hose. The Power Broker feature (top right) lets you dial in the operating amperage (and thus the suction rate) so you don’t trip a breaker when both tools are activated—an especially handy feature when plugging in larger-amperage tools to the socket.

Dual filters located above the holding tank can catch 99.93% of particles 3 microns or larger. The filters can be shaken clean using the electromagnetic pulse-clean mode or they can be removed for more thorough cleaning. The hose inlet port accommodates standard 2-1/4-in. fittings and the vacuum includes a 1-1/2-in.-dia. hose with a 1-in. end adapter.

With all of its worthy features, the Bosch 3931A has become a much appreciated addition to the clean-air campaign in my shop.

Photo: Thomas McKenna

read full review

Editor Test Results:

Exhaust Lower rear of motor housing, above collection canister
Noise Rating 62 db. at 5 amps; 74 db. at 11 amps

Manufacturer Specifications

Manufacturer Bosch
Manufacturer's Web Site www.boschtools.com
Manufacturer's Phone Number 877-267-2499
Controls Auto Start: Yes
Intake Hole Size 2-1/4-in.
Impeller Size N/A
Materials N/A
Size 11.35 gal.
Horsepower Max 6.5 hp
Amps 5 to 11
Volts N/A
Speed Variable Motor Speed: Yes
12/17/2007

Good suction, but adjustable to avoid overdrawing current. Works great on 20A circuit.Accessories are expensive.Quieter than I expected.No "blower" mode.
8/24/2007

This machine is sold in Germany under the Mafell label. Mafell is a very height quality power tools manufacturer.I think this is an excellent vac on site I hock it up to my table saw and chop-saw with a hose Y from festool and it perms beautifully.You can also order through Mafell usa a different handle the includes a systainer deck, it screws right on in the same mount holes as the original handle.
8/17/2007

VERY NICE VACUUM. PLENTY OF POWER. GOOD AUTOSTART. VARIABLE SPEED IS A NICE FEATURE. NO ACCESSORIES INCLUDED. A LITTLE LOUDER THAN I EXPECTED.

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