Reciprocating Blades - Bi-Metal Unique - Pneumatic Machines

Starrett Bi-Metal Unique reciprocating blades are designed specifically for pneumatic (air-powered) reciprocating saws used for cutting metal. They suit material thicknesses of 1.6-11mm (1/16-7/16"), which covers typical sheet, panel and light-section work. Every blade in the line shares the same compact 92 x 13 x .65mm (3 5/8" x 1/2" x .025") size and unified shank, so the only choice to make is the tooth pitch and the pack size. Choosing the TPI: 32 TPI is the finest option, suited to the thinnest sheet where as many teeth as possible need to stay in contact. 24 TPI suits thin sheet and light-gauge panels. 18 TPI is a good general pitch for slightly thicker metal. The 14-18 variable pitch helps on mixed thicknesses towards the heavier end of the range. As with any metal-cutting blade, aim to keep at least three teeth in the material. Packs of 5 suit occasional use and trying a pitch; packs of 20 are listed for regular users. The blades are supplied in a plastic tube that protects the teeth in storage and in the toolbox. Usage tips: support thin panels close to the cut to stop vibration, let the air saw run at its working speed before entering the material, and replace the blade once cutting slows noticeably. Will these fit an electric reciprocating saw? They are designed specifically for pneumatic reciprocating saws, so check your saw before ordering. Which TPI should I start with? If you mostly cut thin sheet, 24 TPI is a sensible starting point; choose 32 TPI for the thinnest material and 18 or 14-18 for thicker metal.