hello mark
If the chuck on your Bosch Hammer Drill HD18-2 is stuck and won't come off, here are a few things you can try:
# Use a pair of pliers: If the chuck is only slightly stuck, you may be able to loosen it by using a pair of pliers. Wrap the jaws of the pliers around the chuck and turn it counterclockwise to try and loosen it.
# Apply some lubricant: If the chuck is stuck due to rust or debris, applying some lubricant can help loosen it. Try spraying some WD-40 or a similar penetrating oil onto the chuck and let it sit for a few minutes. Then try to loosen the chuck with the chuck key.
# Use a rubber mallet: If the chuck is really stuck, you can try using a rubber mallet to tap it loose. Place the drill on a stable surface and use the rubber mallet to tap the chuck in a counterclockwise direction to loosen it.
# Use a chuck removal tool: If none of the above methods work, you can try using a chuck removal tool. These tools are designed to grip onto the chuck and help you apply more torque when trying to loosen it. You can purchase a chuck removal tool from a hardware store or online retailer.
If none of these methods work, it's possible that there is a more serious issue with the drill and it may need to be serviced by a professional.
or
you can check the link for parts
link:- [[Topic:Bosch Hammer Drill HD182 2016]]