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Bit Application Chart


Overview
 

For contacts :

Bulgaria
Asenovgrad
73, Bulgaria Av.
tel.:+359 331 68390
ôàêń: +359 331 64048
GSM: +359 88 9308371


geomabg@abv.bg

Series

Rock type & Rock Properities

14
Extremely hard, non-abrasive, very fine grained, competent, glassy quartzite, jasperite, chert , irone stone
10 - 12
Very hard, non-abrasive, fine grained, diorite, granite, gneiss, quartzite
9, 9+
Hard, competent , slightly abrasive, granite, gneiss , quartzite
8
Hard, moderately abrasive, fine to medium grain ,  competente  to fractured, granite, pegmatite,  skarns ,  quartz,  silicified volcanics
6
Medium hard, comp. to fractured, moderately abrasive, basalt, diorite,  gabro
4
Medium soft, abrasive, competent or fractured, dolomite, weathered  granite, serpentine
2 - 3
Very abrasive - soft or hard, unconsolidated, coarse grained, conglomerate, sandstone ,limestone, concrete

 

 

 

 

 
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