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I can do better with a sabre-saw with much less risk of injury. The connection between the Rotozip head and the circle cutter is very sloppy. Impossible to make a precision cut in any material other than drywall.
The circle cutter lived up to my expectations so far, but I have some big plans for the future so we will see.
You need rigidity to cut decent circles.2. Rotozip videos tell you to Make a hole for the pivot peg. That should be your first clue.Faults:1.
Most "fixes" deal with this issue.3. What the don't tell you is the size of the pivot peg is bigger than any of their standard bits. Poorly designed "peg".
First, think about the fact that there are tips on the web about how to "fix" this attachment. The plastic is very smooth allowing the guide to change diameters no matter how much you tighten the knob. So you either have to try and round out the hole with the RZ to get the peg to fit (good luck), or you need to use a drill to make the hole the correct diameter.Pro's:None I can think of.Basically, this attachment is a piece of junk.
It's plastic, and not a rigid plastic either. It slips.
If they had, they'd have discovered the problem quickly. It's a shame that Bosch didn't do 'real world' testing before they released this unit. If it does I'm going to try to glue two non-adhesive pieces of sandpaper (cut to fit) together -- with glue that won't slip.
This will definitely ruin your plan for making a perfect hole. Next I'm going to try sticking two pieces of this sandpaper to each other (adhesive side to adhesive side) leaving two 'sand' sides out. As noted by others, the Bosch RotoZip circle cutter has a major flaw -- it tends to change the diameter setting as you cut - no matter how tight we twist the knob.
Hopefully the adhesive won't slip. Some complain about it's plastic makeup but I didn't find that any problem. I tried putting a round piece of self-adhesive sandpaper (cut to fit) between the two parts of the unit, but it didn't work.
The 'sand' side held but the adhesive side still allowed the setting to slip (oh, so slowly but steadily).
It may work well on drywall, but on harder materials, this thing is useless. I hoped to use this circle cutter to cut some 8 inch circles in hardboard. I found that the tension screw would not hold the angle securely and the device would open or close while making the cut.
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