July 8, 2021
Description
After watching a restoration video by Hand Tool Rescue of a fractal vise (https://youtu.be/QBeOgGt\_oWU), I was fascinated by the mechanism, it lets you clamp curved or irregular objects. I didn't find anything similar when I searched thigiverse, so I decided to design my own.
Rather than designing an entire vise I instead designed a jaw that can be used as a bench dog, in workmate benches, or proper workbenches.
The peg on this version is 0.77", 19.6mm, but I've included a 0.75" 19mm version as well.
All parts were split so that printing could be accomplished without supports. The design is intended to be assembled with screws, but adhesive could work for most parts, except the retaining screws.
A 0.3mm clearance was the basis of design, but the pin sides of the sliding dovetailed parts can be shimmed for printers that can't achieve this precision.
either #4-40 or 3mm screws will work, 3 different screw lengths were used, 9/16"(14mm), 3/4"(19mm) and 1-1/8" (35mm)
*(Actual size used on pictured assembly was 1.25" (38mm) but they were slightly too long)
If anyone wants a version with a different diameter, let me know and I can adjust that, or you can make your own to fit, the hole in the main jaw has a 3° taper to guarantee a tight fit.
I designed the peg split so that it prints in the orientation for optimal strength.
For doing real work, this should be printed with several perimeters (I used 4 and it seems quite tough)
Rafts:
No
Supports:
No
200
Infill:
20
License:
Creative Commons — Attribution
8
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