Instructables

Fabricating a Pocket Billiards (Pool) Mechanical Bridge

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Solving Life's small problems with home digital fabrication.

A favorite past time of my beautiful wife is to play billiards.  But along with being short of stature she also has short arms for the across table shots.  Many places either do not have a “bridge” or have one that is not available when needed.  My solution was to produce a mechanical bridge that would attach to one of the extra on-site pool cues.  This mechanical bridge attachment had to be small and lightweight so she could carry it in her purse.  When a bridge is needed she takes a extra pool cue and attaches it to the end for those hard to reach angles.
The great thing about home digital fabrication is you can very quickly make simple objects to solve problems.
 
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Step 1: CAD layout of bridge

Picture of CAD layout of bridge
First begin by sketching the shape of the bridge.  Any functional shape will work but for this first one I stayed with a traditional design.
The width should be about 4.5 inches and height about 2.4-2.5 inches.  After the shape is produced in the CAD sketch extrude to 0.25 inchs.  After Extruding to the thickness of  0.25 inches fillet all edges by 0.125 inches.  This will give a nice rounded edge and less clean-up after printing.

Step 2: Extruding

Extrude the 0.625 inch circular area to 1/2 inch depth that the pool cue receiving hole will go through.
Next extrude the0.375 circular area for the clamping screw.  This is a compound angle that will be at a 45 degree in the xy plane and 20 degree in the Z-Y plane.  This will allow easy access to the clamping screw.
Place a hole in the larger circular extrusion (pool cue) of 0.51 inches.  This will fit most cues.
Place a hole in the smaller circular extrusion for the clamping screw of 0.125 inches

Step 3: Printing

Picture of Printing
IMG_0127.JPG
Print the bridge with 20-40% infill.  This will give it a light weight and adequate strength.
dbc12182 years ago
Looks like we both have an M2! Except your printer is black, did you make a special request for that?
xrayjim5120 (author)  dbc12182 years ago
No special order. The top z-bar clamp and x-rail support is anodized black. The heated bed is also black. Frame is brushed stainless steel and everything else is natural aluminum color. I have only had the M2 a few days and this was the first non test object. Still a lot to learn but i do like the printer so far.