Overview

This grabber comes from The Parametric Grabber.

I found the hand as it was designed was too small so set about making it bigger.

I increased it by 133% which allowed me to use a 21.5mm PVC pipe as the "arm" / tube. The pipe is common in most countries: UK, Australia, USA (1/2" SCH-40)

This grabber has a new "toy" trigger handle as the original was too had for the kids, so I set about (18 months later) to make a simpler trigger style handle and this is the result!.

The trigger rotates a cog which is the string puller. All 4 fingers work in unison, not independent.

Parts Required

• Strong non stretch fishing line
• Strong Thin elastic (I got some from the local sewing shop)
• Filament to use for the "joint" bolts
• 2x 20 - 30mm M4 Bolts (they form the hinge pins for the handle)

Assembly & Print Notes

• The finger in this model has the 3d support strictures already added (just as I printed it 18 months back).
• The handle can be glued closed. I have not done that yet.
• I have all parts in sketchup if anyone wants them
• The edges of the handle are 90˚ sharp. (perhaps they need a softer edge)
• Be SUPER carefule with the "hand" square edges on the palm. We had one kid with a bleeding head because of it :-)
• Tieing the fishing line tight is tricky. Get the elastic super strong is my advice.