Where can I find a goof featherweight weapon motor?

Hi. I'm kinda new to the whole roboteering stuff, and I was just wondering where I can find a good featherweight weapon motor for my first robot.

Good* jeez, the one time I actually need auto-correct.

Spinner motor? Basic one would be ford mondeo fan motor

What does it have to do? Drive? Hydraulic pump? Spinning weapon?

Spinning weapon.

I had reasonable succes with the Hobbyking NTM5060 series of motors.

Need some mods to make'm perfect for us.

Depends on your budget and how you want to control it. Brushed motors whilst producing less power generally have higher start up torques which you will need to get a weapon moving. They can also be controlled by a relay or solenoid for simple on off control. Brushless have many orders of magnitude more power, generally have lower start up torque and need fancier speed controllers to get them going. You can do either cheap or expensive and sadly there isn't a best case for all scenarios. From memory you have,

- Brushed - speed 900s or the fake versions that came off ebay a while back, small magmotors (ampflow motors), car fan motors and a few others that escape me right now
- Brushless - I've used the larger 4000 series outrunners from scorpion before to great effect. There are dozens of brushless available. Hobbyking have come along with a bunch of cheaper options recently. Best bet is to look at what others have done.

What kind of spinning weapon do you have in mind?

A vertical spinner mounted on the top of the robot, with a belt connecting it to a spinning motor in the chassis of the robot.

dimensions of the disc and weight?