closeup of gear wheel mechanism inside broken angle grinder machine on a gray background

alloy aluminium aluminum angle background ball bearing blue box broken case closeup cog cogs cogwheel connect cooperation crack damaged detail device disc disposal engine engineering equipment fastener gear gearbox gearwheel gray grinder hole industrial industry inside interlock involute lock locknut machine machinebuilding machinery mechanical mechanism metal motion motor needle nobody nopeople nut open part pinion power precision recycle repair roller rotate round selflocking service shaft side steel teeth tool transmission waste wheel wheels work