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Metal Shafts:
The metal shaft is a small, elongated rectangular prism that is meant to be used as an axle between a motor and a wheel. One end is fit into the spinning part of the motor, and the other fits through the center of the wheel.
Shafts can be found in a bin in the cabinet that is to the back right of the room when facing the desk and smartboard.
It comes in a variety of lengths ranging from:
2 Inch Shaft
3 Inch Shaft
3 1/2 Inch Shaft
4 Inch Shaft
High Strength (being compared to a 2 inch shaft)
High Strength shafts are used in situations where there is too much stress for a normal shaft to be used. High Strength shafts will often require for a new hole to be drilled for clearance.
Collars
There are multiple variants of collars available throughout the classroom, ranging from some made of metal material and others made from rubber. Their purpose is to keep wheels on a stable and fixed position on the shaft, so that there is not much room for sideways movement along the shaft.
Rubber Collars:
Rubber collars are small and black, and use their own tensile strength to grip the shaft and keep themselves in place.
Metal collars
Metal collars are slightly larger than rubber collars, and they are made of a shiny gray metal. What makes the metal collar different is that on their own, they don't grip the shaft, but with the addition of a screw that is screwed into a hole in the metal collar, they grip the shaft well.
High Strength Collars
High strength collars take advantage of both a nut and a bolt to tighten itself. It is a combination of the metal design and the rubber design. It is made out of plastic, but it utilizes the nut and bolt to strengthen itself. There is another type of high strength collar that is made of metal, and works very similarly to the metal collar. High Stength collars are used for only High Strength shafts.
All of the collars can be found in the back of the room to the left of the cutting machinery.
Rubber Collar
Metal Collar
High Strength Collar (Metal)
High Strength Collar (Plastic)
Spacers
The goal of spacers is to create a physical barrier between the wheels and the structure of the robot so that there is not friction, interference, or lateral movement of the wheels. They can be stacked upon each other along the shaft, and build upon each other rather than relying on their ability to grip the shaft.
They come in a variety of sizes and colors. The difference in color amounts to the width of the spacers, with white ones being wider than the black ones. The different sizes allow you to fine tune the distance from the wheel to the body.
There are also high strength spacers that can are used for high strength shafts.
Spacers can be found on a cart with green bins to the left of the windows overlooking the courtyard.
Sizes:
1/8"
1/4"
3/8"
1/4"
From left to right in inches: 1/2, 3/4, 1/4, 1/8
High Strength Spacers: 1/4", 1/8" (left to right)
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