Threading

From DDL Wiki

Threading

1. Definition- What is a thread?:
A thread is a variation on the idea of using an inclined plane to move an object. A thread can be used to convert torque into linear force.

Shown here is an image of a nut with internal threads and threaded rod with external threads.

Threads come in many types and forums some common types include

-American National and Unified Screw Thread (UN and UNF)

-American Nation Standard Metric Scree Threads M Profile

-Acme Screw Threads

-Buttress Threads

-Tapered pipe Thread

Each of these threads serves a different purpose and is optimized for a specific task.

2. Thread Making: Threads can be put onto a surface in a variety of ways. Some of these methods involve the removal of material while others relay of the reshaping of material.

Some common methods include

-Cutting using a tap or die

-Cutting using a single point tool such as on a lathe or CNC mill

-Tread grinding can be used to generate threads with very high tolerances

-Thread rolling creates a thread by plastically deforming the material into the shape of a thread

-Thread casting can be used to generated threads that do not require high tolerances.

3. References: http://en.wikipedia.org/wiki/Screw_thread

--Mbwasser 10:37, 9 February 2007 (EST)MattMbwasser 10:37, 9 February 2007 (EST)--