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Blade catch wears out too fast
I loved this tool when it was working but after not that much use the teeth that hold the blade under pressure no longer hold hard enough to prevent the blade from coming out. The mechanism that holds the blade has no catch hole, it uses a few serated teeth to pressure hold the blade in place. Unfortunately, once the pressure starts to lessen you can't tighten it down...
The black part on top of the handle must be pulled directly up about 1/2 an inch. this engages the screw mechanism that loosens the blade. For some people doing this the first time feels like they are going to break the handle but it moves easier over time. Now turn the black handle counterclockwise several turns and the blade will hang loose in the holder. Turn the blade 90 degrees and remove it. Place a new blade in and turn back 90 degrees. Tighten the handle on top until it clicks. Align the black handle to the main handle and press back down into place.
Most Bosch jigsaws have a handle on the top of the main handle that you need to pull up and rotate counterclockwise to allow the screw to accept the blade. Insert the blade and rotate 90 degrees into position then tighten the handle and press back down into place. In the beginning it may seem like you are going to break the handle pulling it up but rest assured it will get easier as it gets used.
Here are some directions on installing the blade to ensure the proper procedure has been followed when installing.
Set the blade orbit selector lever to position III.
Fit the supplied screwdriver into the top plunger hole and loosen the internal blade securing screw about 3 to 4 turns counterclockwise.
Insert the blade into blade plunger at a 90° angle to the cutting direction. With a slight upward pressure, turn the blade teeth forward (direction of cut) and guide the back of the blade into the groove in the center of blade roller guide.
Pull gently down on the blade to seat the blade tabs in the plunger.
With the blade in the proper position, securely tighten the blade screw by turning the screwdriver clockwise.
I hope this helps. Please rate on how helpful the answer was. Good Luck and have a great weekend.
What's the model number of that saw?
If it's one of the old ones, a 1581 VS or some such, you need a long thin flat-head screw driver that fits through the hole in the top of the handle and reaches down far enough to unscrew (loosen it) the set screw that holds the blade locked in place. Then you twist the blade 90 degrees (perpendicular to the direction of cut), and pull it out. Reverse process for installation, making sure before you tighten the blade it rides in the groove on the guide bearing below.
If that doesn't seem like it's the correct sequence for your saw I apologize.
The Bosch website won't accept any 10 digit tool product numbers due to some glitch in the system, and they made so many variations on that saw it'd make your head spin.
That's the other way some of them loosen up, actually, is by pulliing up the plastic head at the top of the handle and unscrewing it a few turns to loosen the blade.,, Vice versa for install..
Hope this helps a bit!