The stu@ on the whole province of Hi, me
During study period I, i.e. from July 1, 1981 to June 30, 1982, safety inspectors studied
726 lathes in 98 enterprises located in the province of H~me. These studies were carried out
as part of the safety inspectors' normal inspection activities.
During study period II, i.e. from January 1 to December 31, 1986, a random sample of
5% of the enterprises within the entire province was chosen as objects of study. Of the
enterprises included in the sample, 27 had 110 lathes. These lathes were studied by the
author.
To determine the safety level of the lathes, a 12-point checklist was filled in for each
lathe, The list was used to investigate whether the lathe had appropriate safety devices to
prevent hazards caused by
(i) handling of swarf- long string-like chips (chip puller)
(ii) flying chips (chip shield)
(iii) rotating chuck (chuck guard)
(iv) workpieces extending through the head stock
(v) accidental start-ups
(vi) entanglement to the workpiece etc. (emergency stop)
(vii) handling of heavy workpieces (hoist)
(viii) rotating cranks with handles
(ix) Iooseuing ofachuck
ix) long run-down-time of a lathe (brake)
(xi) poor quality of cutting fluids
(xii) poor lighting
During study period II, the use of goggles or face shields was also determined.
The reliability of the study method was checked by having two researchers simultaneously
study the safeguarding of 54 lathes in four enterprises. The agreement between the researchers
was calculated as follows (Fellner and Sulzer-Azaroff, 1984):