DR/DN = Leads of screw to be cut X No. Of threads per inch of lead screw

DR/DN = TPI on lead screw/ TPI to cut

DR/DN = Lead of head screw/ Lead of work

DR/DN = Lead of work/ No. Of threads per inch

(2/3)

(3/4)

(1/2)

(1/4)

Cutting speed and feed

Depth of cut and rpm

Cutting speed time and index

Cutting speed and rpm of job

0.1

0.125

0.2

0.128

0.15

0.2

0.4

0.35