A continued study of an arm rest for the AMP-O-Lectric wire terminating machine.
NIOSH 1973 Jun; :1-18
A laboratory study was conducted to measure the effectiveness of an arm rest and actual factory tests were conducted on the same arm rest for workers using the Amp-o-lectric wire terminating machine. An evaluation was also made of the interaction of the arm rest with the machine guard. Depth, height, angle, and rotation of the arm rest could be adjusted by the machine operator. In the laboratory study data were collected for 15 gauge wire at 25 wire intervals with about 250 wires being terminated at each setting. Tests were conducted with the arm rest and guard, or with the arm rest without the guard. In other tests the arm rest was set at three different angles: left to right 10 degree downward slant, horizontal, or left to right 10 degree upward slant. The best arm rest angle was the left to right upward slant. Using this angle as a 100 percent productivity reading, the left to right downward angle afforded an 88.3 percent productivity level and the horizontal rest indicated a production of 96.1 percent. A higher productivity rate was achieved using an arm rest with no guard. In the factory study, data were collected with 20 gauge wire in 50 wire cycles for a total of 400 wires terminated. The author concludes that productivity can be increased by the use of an arm rest, and operator comfort is enhanced.
NIOSH-Grant; Machine-shop-workers; Repetitive-work; Work-performance; Posture; Musculoskeletal-system; Physiological-stress; Work-capacity; Shift-work; Factory-workers
Industrial Engineering University of Michigan 2260 G G Brown University Ann Arbor, Mich 48105
Final Grant Report
NTIS Accession No.
Musculoskeletal System Disorders
University of Michigan, Department of Industrial and Operations Engineering, College of Engineering, Ann Arbor, Michigan, NIOSH Grant No. T01-OH-00161, 18 pages, 3 references
University of Michigan, Ann Arbor, Michigan