My walking foot machine called “Old Dirty” because he does my dirty jobs for me, is a Singer 111W153 that is rated at a maximum speed of 2900 SPM, but with the 3470 RPM clutch motor that runs it, you had better be ready to sew if you put the pedal to the metal!
I re-stitched every thread line in a large swimming pool cover with it, including 3 rows of stitching on everything, and the speed was an asset to me. Although, folding, re-folding, tugging, and lifting all of that mesh fabric to get the stitch line under the needle all but voided the sewing speed. I did it all by myself, and would work and work to get a section ready for sewing, then one little zzziiippp.......and it was time to refold, tug, and lift again.....
CD in Oklahoma