20 Most Recent Bosch RotoZip Spiral Saw RZ10 - 2100 Questions & Answers

'Sprag' the blade to stop it from rotating. Apply some WD40 or kerosene around the area and use an impact gun or impact driver to crack the nut. Check the thread and make sure you are actually turning the right way to loosen the nut. Some are a left hand thread! Cheers Bob

righty tighty

Try a light penetrating oil on the threads, and allow time for it to work. Sometimes working the nut in both directions, back and forth, a little at a time fill allow the penetrant to lubricate the threads better, allowing it to be more easily removed. Best regards, --W/D--

Hardest part is getting the trigger mechanism back in the right position while putting the screws in place. Everything has a slot/groove it fits into before both outside covers can be put together. One side will be easier to hold the pieces while the other simply covers them. A spot of glue (elmers) may help to hold trigger in place and the wires.

Did you ever solve this problem? Mine just did the same thing right after I put a new blade on for the first time I ever used it

You may have to split the housing for this. I have seen where the pin can become bent or where the plastic housing becomes worn at the pin and allows it to move around too much. They usually also have a small spring with the pin which may have failed.

Try a little PB blaster penetrating oil and a little more muscle not to much!! Nut might be a tad bit rusted in place. Good Luck....

Hi, W/D here.
Check the brushes first. Demo's get pilfered for small items, and the brushes may have been 'misplaced'. If they're there, then trace your wiring through the switch.
Best regards, --W/D--