Single bag extractors have always been cumbersome to use. They were designed for use on jobs sites where two-bag units are too big to move around. Most single-bag extractors still weigh 20+kg – a fair weight to lug around.
This extractor solves the problem by changing motors. Instead of fitting a slow-running, heavy induction-type motor, this extractor has a smaller, lighter brush motor. Because brush motors spin at higher rev’s the fan unit has also been shrunken down. The drop in weight of this extractor is dramatic – only 8kg!
The higher clear air flow of 910CFM means as the bag fills up and efficiency is reduced it will still provide reasonable suction. Or if possible, set the outlet over a bin to dump the shavings in one place for quick clean-up.
||1 x 4in
||1120 x 320 x 390mm
It Starts With Air Flow
There are two measurements of extractor efficiency – air flow which we measure in in cubic feet/minute (CFM) and the other lesser known measurement is static pressure that we measure in inches of water (in/H2O).
Most woodworkers buy on CFM, but this is only a measurement of the extractor flow when no hose is attached and at the head of the extractor – not a common real-world measure. On the other hand, static pressure measures the resistance once hose has been attached.
This will of course vary depending on the hose size so we list all static pressure measurements with the most common size 4in hose for consistency of comparison. As hose size increases static pressure will decrease and vice versa for smaller hose.
So make sure when you compare extractors that you get the static pressure rating as well as the CFM to ensure that you are getting a machine that will work as well as the Sherwood range.