Nura 3.0 Modification

The Nura 3.0 is a knife that I had been waiting to purchase for a while. The part that interested me the most is its use of the new Kershaw Velocity Technology (KVT) system, which is just a fancy name for the ball bearings that are used in the knife pivot. For $30, this is one of the cheapest knives on the market that includes ball bearing pivots.

Disassembled Nura 3.0 Pivot

Unlike the nicer ball-bearing knifes with either titanium handles or precision ground washers upon which the ball bearings roll, the ball bearings in the Nura come in direct contact with the 410 stainless steel handles. As a result, the new knife does not open very smoothly. Opening the new blade feels like opening a wiper blade with many small detents between the fully closed and open positions. With repeated use, however, the ball bearings wear a grooved track in the steel with a ball-peening effect, creating a hardened track within which the bearings can roll smoothly.


I actually ended up purchase three of these knives to modify. The first modification was filling the grooves in the handles of the knife with orange glow-in-the-dark powder and epoxy. The pictures about show the front and back of a stock Nura 3.0 and the modified product. Glow-in-the-dark pictures and more modified Nura 3.0 knives to come!


EachPick for ProMAT 2015 in Chicago

EachPick gripper holding a tissue box.
EachPick gripper holding a tissue box.

Between September and March, I was tasked with creating a flexible gripper to handle a variety of objects using Grabit’s core technology, Electroadhesion. After some 14 revisions of the gripper, this particular one ended up being sent to Chicago for the ProMat materials handling conference in March. A video of the gripper in action can be found here on Youtube.

I actually ended up making 4 similar units of the EachPick gripper. Two of the units were for mounting on the robot, and the other two units had a handle with a button for manual operation.

The fabrication techniques used for each of the units included aluminum machining, 3D printing, vinyl cutting, laser cutting, and vacuum forming. The robot-mounted versions of the EachPick gripper are controlled using a Pololu Maestro Servo Controller through TTL communication. The Denso RC8 controller handles the timing of the opening, closing, and operation of the LEDs and high voltage along with the motion of the robot arm. The handheld versions of the EachPick gripper are controlled with an Arduino Uno, stripped from the programming board.