Summary

I was inspired by an old card shuffler my grandmother had.

Like this: http://www.amazon.com/Think-Fun-Manual-Card-Shuffler/dp/B00005BYL1/ref=pd_sxp_f_pt

Instructions

Here is the video:
http://youtu.be/UNC6esL7LZw

To print:
1 x CrankFace
1 x CrackFaceBack
1 x Handle
2 x AxleCap
1 x SmallCap
1 x SmallGear
2 x SmallGearLittleHole
1 x BigGear
2 x Roller
2 x CardGuide
2 x CardDeck
2 x CardGuideBottom

To finish you'll need:
2 x 140 mm x 2 mm (coat hanger wire)
2 x 3 mm grub screw
31 x M3 x 10mm bolts
3 x 3 mm ID washers
Rubber Band (to glue to roller for grip)

Future revisions will include:

Improved gear mesh
Bumper to guide cards downward
Perhaps smaller footprint, as it seems to be a bit wide for a deck of cards.
More cutouts to reduce mass of ABS used.
Options for nuts, rather than relying on plastic to hold the bolts.

Manual Playing Card Shuffler