PWS and Stepper motor

[Xienix]

Good morning folks from 3dprintboard
1st of all I'd like to say that this forum has the best antispam check i've seen so far.

I am 17 years old and about a year away from finishing HAVO (higher general secondary education,still not sure if that's equivalent to highschool)and we've got something called PWS,Profiel WerkStuk (it's Dutch but I'll try to explain it in a sec)
A PWS something in which you and a partner have to do a research on a subject for at least 80 hours but we asked if we could build something instead and they said yes
We decided to make a 3D printer(also to show you can make whatever you want if you put enough effort into it), 1st we wanted to make a XYZ one but a month back we saw a delta printer which looks for more interesting

I looked up all the parts we needed etc
but my friend (pws-partner) went to a jumble sale and by coincidence saw 8 stepper motors for 16 euros (21,41 dollars) and bought them of course
we still don't really know if they're good enough for a delta 3D printer so that's why I am here
I've made some pictures
http://i.imgur.com/LVagosg.jpg
http://i.imgur.com/LGU1UHi.jpg
http://i.imgur.com/Q5VOwgQ.jpg

We would like to know if they're strong enough to for a delta printer