Axle Preparation Study – Filed and Sanded Axle

This axle was dressed with an ordinary metal file in order to remove burrs and crimp marks.  Under the microscope, the file itself looks like this:

After filing, the axle looked like this:

After filing, wet sanding at grits of 320, 400, P600, P800, 1000, 1500, and 2000 was applied.  After each grade of sanding, a cotton cloth was used to clean the slurry from the axle.  The following are images after each sanding step.
320 grit

400 grit

P600 grit

P800 grit

1000 grit

1500 grit

2000 grit