16874. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be September 13, 2025 by Admin 10 r.p.m. 20 r.p.m. 120 r.p.m. 180 r.p.m. ✅ The correct answer is option B.