How to Size a Dust Collector
Woodworking with power tools can create a considerable amount of fine sawdust. The sawdust from many types of wood are known to cause respiratory problems. A dust collection system with a fine micron filtering system can reduce the amount of fine dust in the air in the woodshop. Dust collection systems can range from a small, portable unit that is connected to each individual tool as the tool is used, to stationary systems with ducting connected to each machine.
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Instructions
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Determine the number of tools you need to connect to the dust collector at the same time. For many small shops, where only one person is working, a single dust collection system mounted against a wall with a hose that transfers from tool to tool is acceptable. Woodshops with more than one tool being operated at a time may require a much larger system with permanent duct work connecting each tool to the dust collector.
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Identify the amount of air flow needed for each tool. Table saws, radial arm saws and jointers all require about 350 cfm (cubic feet per minute) of air flow. Band saws, planers and wood lathes all require about 550 cfm. Sanders and sanding tables require about 700 cfm to collect all of the fine sawdust.
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Add the air flow requirements of the tools that will be used simultaneously to determine the size dust collector your system needs to employ. Keep in mind that if you use a permanent system with duct work, you'll want to install gates in the ducting to direct the suction only to the tools in use.
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Tips & Warnings
The amount of air flow required by the tools used at the same time determines how large of a dust collector you need to buy. Keep in mind that some larger dust collectors require 220-volt power on a dedicated circuit in either single phase, or in some cases, three phase.
