I have a dynalink rotary hammer drill 190+19-01908 and need a new chuck assembly but can't find a supplier, are these available and if so, from who

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.

Ganesan Chandraiah

• 42 Answers
• Posted on Jan 13, 2009

SOURCE: Chuck broke on my hammer drill

To take a chuck off of your drill open it up all the way.
Inside there's a screw that you have to take out. It has to be turned clockwise to get it out.
You may need to struggle with it a bit because it's usually really on there tight.
Some folks even use a second drill to loosen it up and that's a really good idea if you have access to one.
Once you get the stubborn little screw out, put an Allen wrench in the spot where the bit would fit in.
If you can't turn it--and you probably won't be able to--then try using a rubber mallet to (gently) hit the arm of the Allen wrench to get it to turn.
Then you should be able to just take it out.
Put the new chuck into the drill.
Add a few twists of the Allen wrench in the opposite direction.
Tighten it up good.
Put the screw back in place and also tighten that up good.
The drill has a lot of vibration and if these aren't tight, it'll cause problems down the road.
Your drill, expertly fitted with your brand new chuck, should now be good to go.

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SOURCE: Chuck broke on Skil hammer drill

As long as the new chuck threads onto the old spindle then any chuck will work fine.

SOURCE: Sir, I have a Powerbase Xtreme Rotary SDS 1200W

http://manuals.syntigroep.nl/manuals.htm
have a look here, they have just about every owners manual on the planet

SOURCE: Makita HP1640 hammer drill dual mode - 2 hours

Exchanged Makita HP1640 hammer drill for a new one. The 2nd drill did the same thing in under an hour!! Will return for refund. Instructions say the Forward/Reverse switch must be in a full up or down position for the Hammer/Rotary switch to move; well, it is and the Hammer/Rotary switch still stops at a 1/2 way point between modes. Although I can still use the drill, instruction warnings say not to because it may potentially burn out the motor. I'll have to go with a different brand this 3rd time around. It seems to be a design flaw.