Disc for grinder and method of construction

Abstract

The method is for producing a disk of the type having a central hub surrounded by an abrasive material, the hub having an aperture of the type provided in abrasive discs sold by Robert Bosch GmbH under the trademark X-LOCK, the method comprising the steps: positioning a metal hub against an abrasive disc, the metal hub having an annular portion and a plurality of tabs, the annular portion defining an aperture of the type provided in abrasive discs sold by Robert Bosch GmbH under the trademark X-LOCK and the plurality of tabs protruding from the annular portion, against an abrasive disc, the abrasive disc having a central void, and the positioning being such that the metal hub occludes the central void and the tabs protrude through the disc; and bending the tabs such that the abrasive disc is gripped between the annular portion and the tabs.

1 . A method for producing a disk of the type having a central hub surrounded by an abrasive material, the hub having an aperture of the type provided in abrasive discs sold by Robert Bosch GmbH under the trademark X-LOCK, the method comprising the steps:
 positioning a metal hub against an abrasive disc,
 the metal hub having an annular portion and a plurality of tabs, the annular portion defining an aperture of the type provided in abrasive discs sold by Robert Bosch GmbH under the trademark X-LOCK and the plurality of tabs protruding from the annular portion, against an abrasive disc, 
 the abrasive disc having a central void, and 
 the positioning being such that the metal hub occludes the central void and the tabs protrude through the disc; and 
   bending the tabs such that the abrasive disc is gripped between the annular portion and the tabs.   
     
     
         2 . A method according to  claim 1 , wherein the tabs extend through the void. 
     
     
         3 . A method according to  claim 1 , wherein the disc has, for each tab, a recessed section which receives the tab after the bending step has been completed such that the disc and hub are mechanically locked together. 
     
     
         4 . A method according to  claim 1 , wherein the disc has an opening for each tab and each tab protrudes through the opening provided therefor after the positioning step has been completed.