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Walk-through survey report, control technology for hand grinding at Producto Machine Company Foundry Division, Bridgeport, Connecticut.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, ECTB 145-11a, 1983 May; :1-12
An evaluation of high velocity low volume (HVLV) technology in the hand grinding industry was evaluated at Producto Foundry (SIC-3321), Bridgeport, Connecticut on March 24, 1983. The foundry had the basic functional activities characteristic of all foundries. One of the most significant hazards associated with foundry activities was silica (14808607) exposure during the cleaning of castings. Producto had an extensive emission control system. However, for a variety of reasons, the HVLV hoods had been removed and thus the majority of the hoods, hoses, and outlets were not in use. Workers felt that the hoods restricted the usable tool surface and access to tight inside angles and smaller diameter orifices. The use of the HVLV was estimated by one experienced worker to slow the clean room production by 30 percent. Furthermore a change over to a new type of grinder using 6 inch cup stones instead of 7 inch flat wheels made the grinder incompatible with the old hood designs. The author concludes that the HVLV system at the facility was a major effort to implement this technology in the foundry industry; however, it has not been accepted by the workers and thus is not achieving its intended goal.
NIOSH-Author; NIOSH-Survey; Worker-health; Region-1; Field-Study; Industrial-ventilation; Dust-exposure; Work-practices; Industrial-exposures; Time-weighted-average-exposure; Ventilation-hoods; Ventilation-systems
Field Studies; Control Technology
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division