How is a small-diameter straight shank drill usually held in the tailstock?
With a drill chuck
The tailstock barrel of a lathe is bored with an internal Morse taper socket. A cutting tool can be mounted in it either by a matching taper shank or through a holder that grips the tool.
A straight-shank drill has a plain parallel shank with no taper, so it cannot seat and drive directly in the Morse-taper socket; it needs a holder that clamps its parallel shank.
A drill chuck provides exactly this. Its three jaws close together to grip the straight shank and self-centre the drill on the axis.
The chuck itself carries a taper arbor that fits into the tailstock barrel, so the whole assembly seats securely in the tailstock.
A Morse taper (option 3) suits only taper-shank drills, not a straight-shank one, so it cannot hold this drill directly.
A sleeve adapter (option 4) merely enlarges a small taper to fit a bigger socket and still needs a taper shank, and a dog carrier (option 1) is a turning driver, not a drill holder, so neither grips a straight shank.
Hence, the answer is With a drill chuck.
Similar Questions
What is the point angle of the drill used to drill copper?
The clearance angle of a drill is between ______.
What is range of drills provided on a Morse taper?
Which of the following formulas is used to calculate rpm where cutting speed and diameter are known?
The Morse standard taper is available in _______ numbers.
The helical angle of the drill determines the _______.
The distance that the tool advances for each revolution of the work is known as ______.
Centre drills are usually held in a ________.
Find the tap drill size, if the major diameter is 10 mm and the pitch is 1.5 mm.
The process of enlarging a hole size and enhancing its surface finish is known as _______.
Important Questions from Drilling and Reaming
What is the point angle of the drill used to drill copper?
The clearance angle of a drill is between ______.
What is range of drills provided on a Morse taper?
Which of the following formulas is used to calculate rpm where cutting speed and diameter are known?
The Morse standard taper is available in _______ numbers.
