I disassembled this spindle (HSD ES919) in order to replace the bearing ,the original bearing were :
2x VEX 30/NS SQCE1 (hybrid bearing ,abec 7)
2x VEX 40/NS SQCE1 (hybrid bearing ,abec 7)
I am planning to replace this with high capacity bearing instead of high speed(they are cheaper and I rarely work above 18k rpm)
2x SKF 7008 CD/P4ADBA
2x SKF 7006 CD/P4ADGB

do think they will get the job done ?