Jack-in-a-Box Puzzle Kit

Here’s a fun project that you can make that will amaze your friends. When done, a tiny jack is contained inside a cube with a hole in it. How did they get in there? How was it made? The kit includes an aluminum cube to practice on and a brass cube for your finished puzzle. Producing the finished cube requires a series of drilling and boring processes explained in the step-by-step illustrated instructions that come with the kit.

Detailed Equipment List You Will Need for this Project

• 4-Jaw Self-Centering Chuck
• Chuck Adapter for the rotary table
• 3/8″ diameter end mill holder
• 1/8″ End Mill, 3/8″ Shank

NOTE: If you already own a CNC mill you do not need a rotary table. You can, instead, write a G-code sequence to accomplish the task.

What’s Included:

The kit includes both an aluminum and a brass billet of 3/4″ square stock cut to slightly over 3/4″ long ready for you to make this interesting puzzle on your Sherline mill. Included are a 3/8″ end mill holder, a 1/8″ End Mill, a 3/8″ Shank (2-Flute), a key ring, machinable was, and instructions.

Click on the images below to view examples of finished cubes in various materials and sizes.