Thread Terminology and Concepts

The video tutorial covers various technical terms related to thread and screw terminology. It begins with an introduction to the basic concepts of crust and root, followed by detailed explanations of major and minor diameters. The tutorial then delves into the concept of pitch diameter and provides a visualization of how threads interact in bolts and nuts. Further sections explain the definitions of flank, thread angle, slope, and depth of thread. The video concludes with an understanding of lead and helix angle, providing a comprehensive overview of thread nomenclature.

What is the outermost part of a thread called?

• Root

• Crust

• Flank

• Slope

Which diameter is defined as the largest diameter of a thread?

• Pitch Diameter

• Minor Diameter

• Helix Diameter

• Major Diameter

What is the pitch diameter?

• The distance between two roots

• The smallest diameter of a thread

• An imaginary diameter between major and minor diameters

• The largest diameter of a thread

What is the surface called that connects the crust and the root?

• Lead

• Thread Angle

• Slope

• Flank

The angle formed between two flanks is known as what?

• Lead

• Slope

• Thread Angle

• Helix Angle

What is the slope in thread terminology?

• The linear distance traveled by the bolt

• The angle between two flanks

• The distance between the root and the crust parallel to the axis

• The distance between the root and the crust perpendicular to the axis

How is the lead of a thread defined?

• The distance between the root and the crust

• The linear distance traveled by the bolt in one rotation

• The distance between two roots

• The angle formed by the thread with the axis

In a single start thread, the lead is equal to what?

• Slope

• Helix Angle

• Pitch

• Flank

What is the helix angle?

• The angle between two flanks

• The angle formed by a thread with a plane perpendicular to the axis

• The angle between the root and the crust

• The angle formed by the axis with the bolt

What is the axis of the thread?

• The line parallel to the slope

• The line connecting two crusts

• The line connecting two roots

• The imaginary line passing through the center of the bolt