Free-handing a straight cut with a reciprocating saw isn’t the easiest task, but why freehand when you can attach the Mighty-Miter from Seatek? Make right-angle miters in tubing, wood or plastic molding, angle iron, EMT, allthread, or just about any material your reciprocating saw can cut, as long as it’s between 3/16″ and 2″.
The upper clamping bar holds the material against the lower vee jaw of the Mighty-Miter. To clamp small diameter rods Seatec chamfers the clamping bar. They also groove a portion of the bar to keep round material from slipping. Once the material is secured by tightening the thumb screw, you make the cut by swinging the clamp upward, and the blade cuts straight through the material.
If you buy the proper model, the Mighty-Miter replaces your standard shoe with no modifications to the saw. If you want to use the saw for other purposes you can remove the Mighty-Miter and replace the original shoe.
Seatek sells the Mighty-Miter for Milwaukee, DeWalt, and Bosch saws. It’s going to set you back about $110 to $120.