车床操作计算器

`S=[πDN]/100` m/min.

`N=[100S]/[πD] r.p.m. `

Time for Turning = (Length of the job to be turned) / (Feed/Rev).× r.p.m. min.

Time for Borning = (Length to be bored) / (Feed/Rev).× r.p.m.

Time for Drilling = (Depth of hole to be produced) / (Feed/Rev).× r.p.m.

Time required for Cut = (Length to Cut) / (Feed/Rev).× r.p.m.

where, Length of Cut = 1/2 (Dia. of job)

Time for Knurling = (Length of Cut) / (Feed/Rev).× r.p.m.

Time for Reaming = (Depth of Hole) / (Feed/Rev).× r.p.m.

Time for Tapping = `[L+D/2]/[P itch × r.p.m.] min. `
Time for Cutting = `[3/2(L+D/2)]/[P itch × r.p.m.] min. `