that is mostly a thing for bigger shoemaking manufacturies and repair work. Traditional handmade shoemaking happens on the lap while sitting on a low stool! this way you have a lot of control and your legs almost work like a third hand.

by hand there isn't really a better way to stitch rubber as far as i know. but i have also never seen anyone do it at that kind of speed! and it doesn't look like its prepunched. i guess he just has a very sharp jerk needle and a good technique and routine ^^

but if you ask me stitching rubber soles is actually never that great of a choice. especially halfsoles. i would allways rather stitch only the midsole and glue and nail the rubber on(or maybe screw for heavy lugs). otherwise one has to remove the whole heel and resew the whole midsole just for putting new halfsoles/outsoles on which makes no sense. changing outsoles is needed in extreme cases every 5-7 month, while heelstacks and midsoles should be in place 2 or 3 years minimum i'd say. plus a glue/nail bond should keep up longer than any rubbersole itself before it needs replacement anyway. one can off course stitch the halfsole on with a seperate seam but nails also hold up better than seams against the abrasion, so... i really don't get why everybody is sewing the rubber. i guess initially, before the stitches pop, it is a LITTLE bit stronger but in my experience that changes quickly with wear. on every other part of the bottom construction though, like the heel seat for instance i would allways prefer stitching, because where there's no direct abrasion they are just better and longer lasting i think. and less corroding material in the soles...

that is mostly a thing for bigger shoemaking manufacturies and repair work. Traditional handmade shoemaking happens on the lap while sitting on a low stool! this way you have a lot of control and your legs almost work like a third hand.