The Husqvarna K770 Vac is new for 2019 and offers a new way to deal with concrete dust while cutting. Innovative developments allow a H-class dust extractor to be connected directly to the rear of the saw. The front guard has a retractable lower cover to help manage suction of silica dust and other particulates. The lower section automatically folds back, so there is no extra activity for the user to undertake.
The K770 Vac provides the same reliable cutting as the regular K770. While it is only available in 300mm, the blade is held forwards of the guard allowing a cutting depth of 122mm. This is close to the 125mm which is achieved by a 350mm K770.
It is vital to control concrete dust in order to protect both site and operators. While the K770 Vac will work with more commonly used M-class dust extractors, these are not recommended when working with concrete dust. The particulates are finer than the dust generated when working with wood and metal. M-class dust extractors also fail to provide the needed protection when emptying or changing bags. An H-class dust extractor such as the Husqvarna S26 will give the K770 Vac all the suction it needs, while keeping the dust sealed with H13 filters.
Traditionally dust generated wile cutting was controlled using water. While that is still an option, it is becoming less economical. Slurry also has to be managed and disposed of correctly. Dry dust can be sealed in a LongoPac bag and disposed of far more efficiently. Wet cutting is also unsuitable for many locations due to the damage it can cause to the surrounding area, not to mention the residue build up on machines.
The K770 Vac is a sensible and effective solution to dust control while cutting, which also provides deep cuts and reliable production rates.