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Proper dust collection and air filtration is important in any work space. Repeated exposure to wood dust can cause chronic bronchitis, emphysema, "flu-like" symptoms, and cancer. Wood dust also frequently contains chemicals and fungi, which can become airborne and lodge deeply in the lungs, causing illness and damage. [9] [10]
Wood-dust concentrations vary with type of dust extraction, amount of wood removed, and type of sander (Thorpe and Brown 1994). [2] For electric belt sanders used to sand dowels , total dust concentrations ranged from 0.22 mg/m with external dust extraction to 3.74 mg/m without extraction, and concentrations of respirable dust ranged from 0.003 ...
Sawdust (or wood dust) is a by-product or waste product of woodworking operations such as sawing, sanding, milling and routing. It is composed of very small chips of wood . These operations can be performed by woodworking machinery , portable power tools or by use of hand tools .
Reverse pulse-jet dust collectors can be operated continuously and cleaned without interruption of flow because the burst of compressed air is very small compared with the total volume of dusty air through the collector. On account of this continuous-cleaning feature, reverse-jet dust collectors are usually not compartmentalized.
Wood shaper cutter heads typically have three blades, and turn at one-half to one-eighth the speed of smaller, much less expensive two-bladed bits used on a hand-held wood router. [ 1 ] [ failed verification ] Adapters are sold allowing a shaper to drive router bits, a compromise on several levels.
After Broussais died in 1838 the enthusiasm for leeches rapidly faded away, leading to a drop in the demand for leeches, [126]: 120 [127]: 10 and the employment of collectors. Cultur: 18: 20: Legger: A legger used his legs to move a boat through a canal tunnel or adit without a towpath. The occupation was arduous and sometimes dangerous. [128 ...
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