title: Characterization of metalworking fluid aerosols in bearing grinding operations.
abstract: The concentrations and size distribution of metalworking fluid aerosols were investigated in grinding operations in the bearing manufacturing industry. Fifteen paired open- and closed-face cassette samples and five cascade impactor samples were obtained in each of three types of grinding machinery (face, microcentric, and progressive). Aerosol mass concentration as measured by open-face filter sampling ranged from 0.34 to 2.43 mg/m3. As measured by closed-face sampling the range was 0.14 to 2.01 mg/m3. For each grinding process, open-face concentration was significantly higher than the closed-face concentration (paired t-test, p <0.05). Mass median aerodynamic diameter (MMAD) ranged from 3.33 to 6.26 microm. The percentage of mass greater than 9 microm ranged from 8.0 to 45.3. The MMAD and fraction greater than 9 microm were significantly greater for the aerosol produced by the face grinder compared with the other two processes. The results indicate that (1) closed-face sampling results in a lower aerosol mass concentration, as compared with open-face sampling, with the degree of difference being somewhat dependent on grinding process; and (2) the particle size distribution and concentration of metalworking fluid aerosols may vary with the type of grinding operation sampled.
authors: Purdue University School of Health Sciences, West Lafayette, IN 47907, USA. frank@purdue.edu
authors: F S
authors: FS
authors: Rosenthal
authors: B L
authors: BL
authors: Yeagy
mesh_terms: D000336:Aerosols; D015386:Hazardous Substances / Q000032:analysis; D006801:Humans; D008669:Metallurgy / Q000295:instrumentation*; D016273:Occupational Exposure / Q000032:analysis*; D010316:Particle Size
chemical_list: D000336:Aerosols; D015386:Hazardous Substances