. Machine design. s to spread joint apart by forcing gibdown. If the gib is too thin it will spring under thescrews and cause uneven wear. The cast iron gib, Fig. 30,is free from this latter defectbut makes the slide ratherclumsy. The screws how-ever are more accessible inthis form. Gribs are some-times made slightly taperingand adjusted by a screw and -po. r.!J Fig. 30. nut giving endwise motion. 39. Flat Slides. This type of slide requires adjust-ment in two directions and is usually provided withgibs and adjusting screws. Flat ways on machinetools are the rule in English practice and are gr
. Machine design. s to spread joint apart by forcing gibdown. If the gib is too thin it will spring under thescrews and cause uneven wear. The cast iron gib, Fig. 30,is free from this latter defectbut makes the slide ratherclumsy. The screws how-ever are more accessible inthis form. Gribs are some-times made slightly taperingand adjusted by a screw and -po. r.!J Fig. 30. nut giving endwise motion. 39. Flat Slides. This type of slide requires adjust-ment in two directions and is usually provided withgibs and adjusting screws. Flat ways on machinetools are the rule in English practice and are graduallycoming into use in this country. Although more ex-pensive at first and not so simple they are more durableand usually more accurate than the angular ways. Fig. 31 illustrates a flat way for a planing other way wouldbe similar to this butwithout normal pressureand the friction areless than with angularways and no amountof side pressure willlift the platen from itsposition. Fig. 90 MACHINE DESIGN. Fig. 32 shows a portion of the ram of a shapingmachine and illustrates the use of an L gib for adjust-, •— 1 ment in two directions. C jTJtrmT
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
