By John Myrtle
Specs and Tester's Tester Comments
One of the biggest challenges of my plumbing and heating practice has nothing to do with pipe, water, or fittings. Instead, one of the most problematic–and recurring–issues is making the cuts required to install those things in all the materials we encounter in both new construction and service work. For example, for a new townhouse job we recently completed, the contractor asked us to cut combustion air grilles through 16 already-installed garage doors. (Why he asked is another story!) The doors were a sandwich of aluminum, foam, and cardboard. A recip saw would have destroyed the surrounding material, a jigsaw would have been very difficult to get finish-quality cuts with, and a circular saw wouldn't cut all materials properly or completely. A cut-out saw, however, with the right bit and a site-made jig, saved us precious time. The tool delivered finish-quality cuts quickly in flimsy materials and in an oddball location.
Because cut-out saws get us out of situations like this, we use them all the time. They're not designed as production tools, and I don't use them for hogging-out drywall or plaster to let a drain pipe through, but they're ideal for one-off jobs. Their bits and rpm are perfectly suited for working in a variety of modern materials–often composites of several different things–and their small size makes them a terrific choice for out-of-the-way cuts or working in tight spaces.
Makita's base plate is sturdy, and the tool-free depth adjustment was easy to use.
Credit: Photo: David Sharpe
I tested four corded and two cordless cut-out saws. The corded tools are the Craftsman 26561, DeWalt DW660SK, Makita 3706, and RotoZip RZ20. The cordless tools are the RotoZip RZ18V-2100 and Ryobi P530.
For the first part of the test, I checked the contents of each tool's accompanying accessory package. Next, I looked at cutting power, feel, switches, line of sight, bit changes, ergonomics, and extra features. I evaluated these items with an eye toward overall ease of use in our everyday applications–which is an ever-changing mish-mash of cut-throughs and cut-outs that can be anything from cutting through tile for new shower valves or sink faucets to working in laminate countertops to plowing through siding or roofing materials for vents.
What You Get
There isn't a tool category I know of that ships with more accessories than cut-out saws. What you get depends on the manufacturer. While I most often use the tool in its basic configuration, I find that I use some of the accessories, like side handles and kit bags. Other items, like a flex shaft, don't really apply to my work.
Tool-free bit change using shaft-lock buttons on the corded RotoZip (shown) and the Craftsman were the easiest to use.
Credit: Photo: David Sharpe
Boxes and Bags. The DeWalt shipped with a hard plastic case; both RotoZips and the Craftsman came with a very nice, heavy-duty canvas bag with pockets and plenty of room for attachments and blades. I like the bags better because the boxes, though they work just fine, take up more space. The Makita and Ryobi did not ship with a toolbox or bag.
Attachments, Corded. The RotoZip and Craftsman each came with a removable side handle, a jigsaw-style handle attachment, a right-angle cutter head, and a circle cutter. The RotoZip also came with a separate bit case, three cutting wheels, three cutting bits, and a wrench. The Craftsman kit included two cutting wheels and four spiral bits, but also included a flex-shaft attachment and bit kit with various grinding and cut-off wheels. The DeWalt shipped with a circle cutter and a side handle. The Makita shipped bare-bones, with no attachments or blades, which is actually fine with me. My work requires that I mainly use the tool in its basic configuration. Besides, if I needed to grind something, I'd get my grinder.
Attachments, Cordless. The 18-volt Ryobi shipped with a circle cutter. The tool's battery and charger are sold separately, the idea being that you can swap batteries among various Ryobi tools if you're invested in that platform, and therefore don't have to buy a new battery every time you buy a new tool. This makes the tool very inexpensive. If you're not invested in the Ryobi battery platform, you have to buy the battery and charger separately.
The 18-volt RotoZip is sold as a kit with lots of accessories: the ZipMate right-angle cutter, two XBits, two ZipWheels, three collets, and the bag. It also ships with a battery and charger. It has a 30-minute charging system, and the tool accepts the new Bosch (RotoZip's parent company) 18-volt Bluecore nicad battery system.