An economical extractor for small home workshop use. It has a 230mm-diameter computer balanced impeller that is capable of removing dust from a single machine at any one time. It comes standard on a base with castors for easy portability, as well as a needle felt filter bag and plastic collector bag.
||1 x 4in
||1575 x 650 x 425mm
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.