This is a procedure done to restore the valves and valve seats. This is done typically when having a head(s) reconditioned.
yes
valve variator
NO In the old days we sed to do this and a proccess called "Lapping" to get a perfect seal between the Valve and seat. Today with special coatings and special materials used in in valves and valve seats any grinding process can seriously damage the valves and seats.
wheel barings
The valve clearance is set by grinding the faces if there is too much clearance or grinding the tip of the stem if there is too little. If it is a OHV engine you can easily adjust the valves. Try going to the link below for a video that shows how to adjust the valves.
To replace valve seats, first, remove the cylinder head from the engine and clean the area around the valve seats. Use a valve seat cutter or grinding tool to remove the old seat and create a precise recess for the new one. Install the new valve seat, ensuring it's properly aligned and seated, then reassemble the cylinder head and reinstall it on the engine. Finally, check for any leaks and ensure proper valve operation.
Grinding a bore.
To fix a leaky needle valve seat, first, turn off the water supply and disassemble the valve to access the seat. Inspect the seat for damage or debris; clean it thoroughly or replace it if necessary. Additionally, you can use a seat grinding tool to restore a smooth surface. Reassemble the valve, ensuring all components are properly seated, and test for leaks by turning the water supply back on.
Chewing and grinding.
No. grinding poverty would be debasing
grinding is a physical change
Grinding into Emptiness was created in 1989.