Hi , a jus want to know the RPM recomended for a ACME internal thread 2" dia. I use to make acme threads on brass I have the programs but i only need the corrects RPM's thank you

this is my program for a 1.5" diameter iner thread 4 pitch per inch double entry (thread) N400G00X9.0Z6.0 N402G50S1500 N404T0808 N406G97S255M04 N408G00X1.0Z.5M08 N410G92X1.315Z-2.90F.5 N412X1.323 N414X1.330 N416X1.337 N418X1.344 N420X1.351 N422X1.358 N424X1.365 N426X1.372 N428X1.379 N430X1.386 N432X1.393 N434X1.400 N436X1.407 N438X1.414 N440X1.421 N442X1.428 N444X1.435 N446X1.441 N448X1.447 N450X1.453 N451X1.459 N452X1.465 N453X1.471 N454X1.477 N455X1.483 N456X1.488 N457X1.488 N458X1.488 (Second lead) N459G00X1.0Z.75M08 N460G92X1.315Z-2.90F.5 N461X1.323 N462X1.330 N463X1.337 N464X1.344 N465X1.351 N466X1.358 N468X1.365 N470X1.372 N471X1.379 N472X1.386 N473X1.393 N474X1.400 N475X1.407 N476X1.414 N478X1.421 N479X1.428 N480X1.435 N481X1.441 N482X1.447 N483X1.453 N484X1.459 N485X1.465 N486X1.471 N487X1.477 N490X1.483 N491X1.488 N492X1.488 N493X1.488 N494G00X9.0Z7.0T0800M05M09 N496M30 %