Document nm94DvX94xMZgYV55eGxaRvx1

MACHINE TOOLS Fig 24-26. Personol protection for a wire brush operation--the chest plate is made of aluminum. tena], leather gloves, face shields, and gog gles should be mandatory (Fig 24-26) Recommendations by manufacturers of wire brush wheels indicate the following operating procedures should be adopted 1 If possible, the workpiece should be held at the horizontal center of the brush 2. Let the wire bps do the work They are designed for this Forcing the work into the brush results in (a) merely wiping or dragging the wires across the work with no increase in cutting action, (b) an increase in wire breakage, and (c) a tendency of the work to become snagged 3 Small pieces being brushed should be held in a simple jig or fixture which will prevent the operator's hands from con tacting the surface of the brush 4 A straight, heavy steel rod or bar should be used to clean the wire wheels, never a small ring 5 When cleaning small (narrow) brushes, the operator should use a work rest or plate A work rest cannot be used for wide brushes, but some method should be developed so that the cleaning rod or bar is strongly supported References American Standards Association, 10 East 40th St, New York City Grinding, Polishing, and Buffing Equipment Sanitation Z43 Markings lor Identifying Grinding Wheels and other Bonded Abrasives BS 17 National Electrical Code Cl (Also available from National Fire Protection Association ) National Electrical Safety Code C2. (Also available from National Bureau of Standards bs Handbook H30 ) Safety Code lor Ila. Care, and Protection of Abrasive Wheels B7 1 (Also available from Grinding Wheel Institute ) Specifications for Standard Shapes and Sues of Grinding Wheels B74 2 Grinding Wheel Institute, 2130 Keith Bldg, Cleveland, Ohio Lewis, Kenneth B The Grinding Wheel 1959 Safety Recommendations lor Grinding Wheel Operation 1958 National Safety Council, 425 North Michigan Ave, Chicago, 111 Guards Illustrated 1962 Industrial Data Sheets. Coated Abrasives, Data Sheet 452 Engine Lathes, Data Sheet 264 Gear Ifobbing Machines, Data Sheet 362 Horuonta] Metal Boring Mills, Data Sheet 269 Metal Planers, Data Sheet 383 Meta! Seen (Cold), Data Sheet 322 Metal Shapers, Data Sheet 216 Metal Slotters, Data Sheet 263 MetaMPorJting Drill Presses, Data Sheet 335 Metal-Working Milling Machines, Data Sheet 364 Vertical Metal Boring Mills, Data Sheet 347. U S Department of Labor, Bureau of Labor Standards, Washington, D C. Suggested Standards lor Industrial Saleguards Special Bulletin 7, 1953. 24-32