metallic gear mechanism in detail of damaged engine case on black background

abstract accuracy aluminum artistic background ball bearing black blue bond box broken business caged case closeup cog cogged cogs cogwheel component connect cooperation cracked damaged design detail disc educative engine engineering gear gearwheel gray grinder harmony housing industry inside involute machine machinery mechanic mechanical mechanism metal metallic motion nobody open part pinion power quality repair research roller rolling rotate round science service side steel success teamwork tech technical technology teeth tool transmission wheel