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Electric (or “power”) hacksaws use a motorized pulley to rapidly drive teeth back and forth across the material to be cut, which usually is metal. This Sawmaster model is from the Miller-Knuth Manufacturing Co. in Nebraska, whose saws used reciprocating blades with forward-facing teeth to save blade wear.
Specifications for this saw are as follows:
-Capacity (thickness of the material it can cut) of 4” (W) x 4” (H)
-8.25” (W) x 13” (H) x 29” (L)
-Shipping weight of about 80 lbs.
-Footlong blade with 5/8” width and 4.5” blade stroke
-Vise angles from 0 to 45 degrees
-Speeds from 90 to 100 strokes per minute powered by 8” drive pulley
-14 teeth per inch (for cutting large steel stock, iron, brass, bronze, copper, and aluminum) or 18 teeth per inch (for cutting tubing, pipe, angle iron, and other thin section materials)
-Cast iron base and close-grained gray iron castings
-$49.85 cost in 1948
The origin of saws dates back at least 5,000 years to ancient Egypt. Electric hacksaws date to the early 1920s. Our Sawmaster electric hacksaw probably is from either the late 1940s or the 1950s and was advertised as being for farm and home workshops. The technology for metalworking has largely been replaced by bandsaws and cold saws.