In this case not working HDD is used. with the serviceable engine which twists disks.
The instruction universal, also is described many times on the Internet. The sharpener very weak, suits only for turning of pencils.
Step 1: HDD Dismantling
Step 2: Final Stage
The HDD case is ground so that all sticking-out and stirring surfaces grind off.
The engine management payment is established into place.
The disk is fixed and the engine is started. Installation is ready to work.