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Lathe Threading: Cutting Threads on External and Internal Surfaces

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Lathe Threading: Cutting Threads on External and Internal Surfaces

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Questions and Answers

What is the purpose of a lathe in thread cutting?

To produce threads on an external surface only

To cut threads of various sizes and shapes (correct)

To produce only tapered threads

To produce threads on an internal surface only

What is the term for the distance between diametrically opposite points on a straight thread?

Spiral diameter

Major diameter

Pitch diameter (correct)

Minor diameter

What is the term for the smallest diameter of a straight external or internal thread?

Thread diameter

Spiral diameter

Major diameter

Minor diameter (correct)

What is the term for the spiral ridge formed on a cylindrical surface?

Screw thread Signup and view all the answers

What is the most common type of thread cut on a lathe?

Straight thread Signup and view all the answers

What is the distance between the root and the crest of the thread?

Depth Signup and view all the answers

What is the angle between the flanks of adjacent turns of the thread?

Thread angle Signup and view all the answers

Which gearbox is used to change the speed of the lead screw?

Standard change gearbox Signup and view all the answers

What is the direction of rotation of a right-hand thread to advance?

Clockwise Signup and view all the answers

What is the purpose of the half nut in a thread cutting operation?

To move the carriage along the lathe bed Signup and view all the answers