Analysis of Handle Shape through Experiments on Hand Drill Performance

Abstract

Hand-powered tools are used in a large variety of operations in Industries/ Maintenance workshops. Our study mainly focuses on the effect of handle shape and workpiece orientation on hand discomfort levels and position. Long-term exposure to these discomforts or intense exposure to discomfort for even a short duration of time may cause Musculoskeletal disorders (MSDs). The present study was conducted in the Department of Mechanical Engineering, Aligarh Muslim University. To investigate – The design of the existing handle shape of hand-powered drill machines currently used in Industries. Modify/ Redesign the shape of tools with ergonomic aspects, According to Indian Anthropometric dimensions. At first, we perform drilling operations on different materials with different workpiece orientations with traditional handles and observe the levels and positions of discomfort. And according to the results we modify the existing handle’s design and experiment with these modified versions with the same working conditions. Then, compare the results with standards and their deviations. The experiment results show that modified handles have low a level of discomfort following the workpiece materials and orientations concerning the traditional handle. They are more comfortable than the existing ones. Additionally, they are more likely to have the perspective of gripping. Hence, it reduces the risk of (MSDs) and improves productivity.