Document aBE2O8gMGKVBNrZQ4jDkRyZ4a

MACHINE TOOLS TABLE 24-K1 DIMENSIONS FOR CONSTRUCTION OF FABRICATED GUARDS OF STRUCTURAL STEEL POSITION OPTIONAL ADJUSTABLE TONGUE ADJUSTABLE WORK REST SIDE MEMBER B-l ATTACHED TO MACHINE SHAFT CAP #12 S S DETACHABLE SIDE MEMBER B-2 Wheel Drnm (in ) C Mnvimnwi Space Between New Wheel and Hood at Periphery (>n ) x> Max Inside Width of Hood (m ) F G a j X Length of Tongue (in ) Dibb of Bolts for Tongue (in ) Sue of Angle Supports for Tongue and Beat (id > Diam of Diam of Thick Rivets Bad Con ness for Sup necting of ports Bolts Tongue (u> ) (in ) (in ) 1% wider Under 12 i% than wheel 3% % lV4xl%x% % % % 12 to 16 1% 2 wider than wheel 5 % 2 x2 x% % Vi % 2 wider 17 to 24 i% than wheel 6 % 2 x2 x% % % % 2 wider Over 24 i% than wheel 7 % 2*6x2%x% % % % Adjusting safety guards The peripheral protecting member can be adjusted to the constantly decreasing diam eter of the wheel by means of an adjustable tongue or similar device Then the angular protection specified for bench and stand grinders will be maintained throughout the life of the wheel, and the maximum dis tance between the wheel periphery and the tongue or end of the ]ienpheral band at the top of the opening will not exceed X in (Fig. 24-19). The guard should enclose the wheel as completely as the nature of the work will permit and should be adjustable so that as the diameter of the wheel constantly de creases, the protection will not be lessened The maximum angular exposure vanes with the type of grinding, specifications are shown in Fig 24-20 on page 24-26 Safety guards should cover the exposed arbor ends Where there is no safety guard, a stationary cylindrical guard is desirable. However, a smooth nut may be used. The nut should be long enough to cover the en tire threaded portion of the arbor even when the thinnest wheel is used A special wrench may be required to remove the nut, but the 24-24