Got it, I just prised them out from the back!!!
SOURCE: hammer drills and rotary hammers comparison
Basically yes. Lower power units are usually titled as "hammer drills." Higher power units, usually labeled "rotary hammers," tend to be larger and provide bigger impact forces. But there are a few differences that are worth knowing: The rotary hammer usually have a chisel only feature, for light chiseling and masonry removal. Rotary hammers also have specially designed chucks that only accept bits specifically designed to fit their chuck. The special chuck on a rotary hammer helps hold the drill bit and prevents it from slipping during use.
SOURCE: Matika hammer drill - bit stuck
The spade bit sold with the hammer drill was actually too large for the hammer drill. We found that the spade bit had over heated (not from overuse or heavy use as only two ladies were using the hammer drill) but because the bit was too large it put too much weight on the drill. The bit had to be removed from the chuck using a hammer and force causing a bearing to come out and the chuck now needs repair. Solution repair the chuck on the hammer drill and buy a lighter spade bit. Then continue jackhammering the cement out of the shower cubicle.
SOURCE: Bosch 11247 Hammer drill works
Usually replacing the o-rings on the piston, striker and Impact bolt will solve any hammering issues. That is considering there is no damage to the mechanical parts in the hammer mechanism.
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