Burnishing Tool

About The Design

In the full assembly, there are 7 parts including the hardware: the main body, cap, bearing axle, 2 knobs for the axle, a bearing, and a ball. The main body allows the tool to be inserted into a toolholder, and it holds the bearing and its axle. Then the bearing slides into the slot at the front of the tool, and the axle slides through the hole on the side. Next, the two knobs thread onto both ends of the axle and secure it. Finally, the ball slides into the large hole in the front of the tool, and is secured in place with the cap.

The main point of contact between the tool and a given part is the ball at the front of the tool. This ball is made out of heat treated stainless steel, so it should ideally be harder than both the rest of the tool and the workpiece of choice. Due to this fact, the tool will wear faster than the ball, which could prove to be an issue in later use.

Design Challenges

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There were a couple big questions that came up throughout the design process. Given time, these were all solved.