How do I straighten a chuck bend off removing a jammed bit?

yes, a bent arbor could be causing this... sometimes they can be straightened... or by a new arbor

Depending on how old it is, I would send it back on warranty. Do not keep bending it or it will break when you bend it, or worse, while in use. It might just be better to get a new, more durable stroller all together.

some drill bits have a certain way to be installed,if not put in correctly it will loosten up

I would say that the motor shaft is probably bent and will need replaced.there are bosch service centers all over unfortunatly the price of parts especieally if it is a older unit can be almost what the unit costs.Sorry I'm not more help as I have several bosch tools in my shop and they are top quality tools. However I also have an old 65# electric breaker out there that is gathering dust because it has a cracked armature and the parts alone to fix it are in excess of $800.00. Best of luck to you and thanks.

The drill uses bits with the SDS+ connection end. You have three different modes of operation. Hammer drill for drilling into concrete. Drill only for drilling into wood or steel and chip only for chiseling concrete. Now for drill only you would have to change out the chuck for a jacolbs style.

The bits just snap in the chuck. To remove the bits you just slide the chuck sleeve back and remove the bit. To change the chuck you wolulld place the palm of your hand over the chuck and using your fingers pull the sleeve on the chuck that is near the red housing towards your palm and just pull off the chuck.It will snap back on the same way.

See if the embroidery arm is bent, that will jam the unit as it trys to move. If is bent you may be able to straighten my bending it gently. The arms get bent by tilting the machine to the back while the arm is exrended.

Sounds like the bit bent slightly and as a result jammed into the chuck. Open chuck as much as possible and have someone pull the bit out while your tapping it with a small hammer. The vibration from the tapping might loosen the bit from the chuck.

separate the housing and remove the gear assembly and chuck ....see if you can use a open end wrench on the shaft and locking pliers on the chuck body

I have a Skill 717, too. It has a hex shank. Here are a couple places that I've located that carry (some) parts:
www.icscuttingtools.com (pages 155 & 157)
www.bamanufacturing.com/page_15.htm

also try:
www.ereplacementparts.com
www.toolpartsdirect.com

b&d usualy thow away inthis range.still you can remove the chuck and fix or relace chuck unscrews anticlockwise hold shaft behind chuck with thin spanner or it may be the type with allen screw dwn the centre of chuck