20 N New since T ool Manual 21 N New in the PFERD pr oduct line 2012 N e w i n t h e P F ER D P r o d u c t L i n e 2 0 6 W H ISP E R R e i n f o r c e d G r i n d i n g W h e e l s S p e c i a l Li n e S G P L U S The WHISPER r einfor ced grinding wheel is a highpower tool fr om PFERD which featur es excellent stock r emoval surface quality and working comfort The patented design contributes to the very soft quiet grinding characteristic and high degr ee of working comfort with low vibration dust and noise levels The design also eliminates edge spalling V ery high machining capacity fr om the very start The incr eased tool pr oductivity allows substantial savings on labour costs Diameter D x Thickness U Nominal Inches Thickness Metric U mm Unthr eaded Arbor Hole Thr eaded Arbor Hole Max RPM Bor e H Inches EDP Number Thr ead EDP Number Depr essed Centr e T ype 27 N 412 x 14 74 78 61250 10 5811 61256 10 13300 N 5 x 14 74 78 61251 10 5811 61257 10 12200 AluminumNonFerr ous Metals V ery Soft T ype Har dness Grade H Specialpurpose tool for grinding on aluminum and nonferr ous metals Pr ovides unusually ag gr essive grinding action The tool does not load up even on soft gr easy aluminum Contains no fllers that might leave undesirable r esidues on the aluminum workpiece The gr ound surface can be welded right away without any further tr eatment Abrasive Special Aluminum Oxide A Grit size 46 W orkpiece Materials Aluminum nonferr ous metals Application Surface grinding work on weld seams fllet weld grinding Recommendation for Use Suitable for use on angle grinders of all output categories PFERD Speci fcation Number A 46 H SGPWHISPERALU E