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A detailed buying guide: how to choose a pneumatic reciprocating saw.
This section covers pneumatic reciprocating saws — mostly compact body saws that use a short, fast stroke to cut sheet metal, pipes, plastic and fibreglass. They are used in car body repair to cut out damaged panels, sills and wing sections, to replace exhaust pipes and silencers, and in sheet-metal work. An air saw is light, fits into tight spaces, does not overheat and carries no risk of electric shock, but it works only with a suitable electric or petrol compressor.
Air body saws are compact (about 0.6–1 kg) and designed for thin metal and pipes, while mains-powered reciprocating saws suit heavy demolition better. A straight body is handy for plunge cuts, and an angled head for hard-to-reach points. See what pneumatic tools are and how they work.
Air saws usually have a stroke of about 10 mm and a rate of 9000–10,000 strokes per minute, giving a fast, smooth cut in thin sheet and steel up to 1.5–2 mm. Use 24 TPI blades for metal and 32 TPI for thin sheet and pipes. Read how to choose a reciprocating saw: blade, stroke length, stroke rate, and cutting capacity.
Body saws consume about 110–180 l/min and run continuously on long cuts. Choose a compressor whose real delivery exceeds this consumption by at least 20–30 %. Read how to choose an air compressor and how to calculate compressor air delivery.
The rated pressure is 6.2–6.3 bar: at low pressure the blade slows down and jams in the metal. Models with a speed regulator let you start the cut slowly and more accurately. See how to choose compressor working pressure.
Most tools have a 1/4" inlet thread for a EURO, ORION or RAPID coupler. Use a hose with an 8 mm inner diameter and make sure the couplers match your system. Read how to choose an air hose and quick couplers.
The air motor is sensitive to moisture and dust, so fit a filter and regulator in the line, and if there is no lubricator, put a few drops of oil into the inlet every day. Drain condensate from the compressor tank regularly. Read how to prepare compressed air: condensate, filters, regulators, and lubricators and how to store and maintain an air compressor.
Choose a model with a rubberised grip, a trigger with safety lock and rear exhaust, while a blade guard shoe reduces vibration and bouncing. Air saw noise can exceed 90 dB, so ear protection is needed. See what is vibration level and how to choose hearing protection.
Disconnect the air before changing the blade, and before cutting check that there are no fuel lines, wiring or airbags behind the panel. Wear safety glasses to protect against metal chips. Read how to choose safety glasses and how to use pneumatic tools safely.
The blade clamp, guide bushing, vanes and seals are wear parts that can be replaced. Choose a model for which repair kits and standard blades are available. See how to choose spare parts for pneumatic and hydraulic tools.
At ToolsArmenia you can compare pneumatic reciprocating saws by stroke length, stroke rate, cutting capacity, air consumption and weight and choose the right model for your body and sheet-metal work.
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