To illustrate: A typical worm gearbox with a 2.4-in. center distance provides 1,000 to 1,200 in.-lb of torque, whereas the E Series offers 2,600 in.-lb in the same-size package.

A worm drive saw, named for the distinct worm-shaped gear in the center, has its motor located in a dedicated housing at the back of the tool. Rather than spinning up the saw directly, ...