20 Most Recent Bosch DWM40L Miter Finder Digital Protractor/Angle Finder Questions & Answers


The manual states this tool needs no calibration. I spoke to the service rep at Bosch, and he confirmed there's not 'published' way to do it. There are a number of outside firms that will do it. If you call Bosch support and explain the problem, they should send you a mailing label and calibrate it properly. Depending on if it's in warranty or not, there may be a fee for calibration and the return shipping.

Bosch DWM40L... | Answered on Aug 30, 2017


It is a wire that has come off inside the black case

Bosch DWM40L... | Answered on Mar 12, 2013


Open the the moveable arm and make it straight (180 degrees) or in line with the other.Take the screw off of the black cover at the elbow (1 screw). Lift from the round part and lift off. Then loosen the two screw just inside the cover. This will allow the flywheel to spin and you should now get a read out. If the flywheel does not spin then you need to replace that piece. Gently tighten the two screws and put the cover back on. Hope this helps!

Bosch DWM40L... | Answered on Nov 07, 2011


Open the the moveable arm and make it straight (180 degrees) or in line with the other.Take the screw off of the black cover at the elbow (1 screw). Lift from the round part and lift off. Then loosen the two screw just inside the cover. This will allow the flywheel to spin and you should now get a read out. If the flywheel does not spin then you need to replace that piece. Gently tighten the two screws and put the cover back on. Hope this helps!

Bosch DWM40L... | Answered on Nov 07, 2011


There is an electronic component that is defective and it draws a lot of current (more than the normal rating) this makes the batteries over heat, if it's new ask for replacement of the tool.

Cheers!

Bosch DWM40L... | Answered on Jan 12, 2011

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