A technician is preparing a rough-sawn hardwood tabletop with uneven high spots and mill marks for a final smooth finish. Place the following power sanding procedures in the correct chronological order from initial stock leveling to final surface preparation.
- 1Level high spots and remove mill marks using a belt sander fitted with a coarse 60-grit abrasive belt run parallel to the grain.
- 2Erase deep linear scratches using a random-orbit sander fitted with a medium 120-grit abrasive disc.
- 3Refine the surface and reduce microscopic abrasive patterns using a random-orbit sander with a fine 180-grit disc.
- 4Perform final pre-finish smoothing using an orbital finishing sander fitted with an extra-fine 220-grit sheet guided along the grain.
Answer
Level high spots with a coarse 60-grit belt sander, erase linear scratches with a medium 120-grit random-orbit sander, refine the surface with a fine 180-grit random-orbit disc, and perform final pre-finish smoothing with an extra-fine 220-grit orbital finishing sander.
Proper woodworking and finishing procedure mandates working sequentially from the most aggressive tool and coarsest abrasive (60-grit belt sander) through intermediate smoothing stages (120-grit and 180-grit random-orbit sander) to the least aggressive tool and finest abrasive (220-grit orbital finishing sander). Each successive stage removes the scratch marks left by the previous coarser grit.
Step-by-Step Solution
Key Concept
Power sander selection and grit sequence progression from rough stock removal to final surface finishing
Estimated Time:1m 0s