type of Tap and Die

 Tap and Die are tools used to cut threads in metal or plastic – taps cut internal threads (like inside a nut), and dies cut external threads (like on a bolt). Here's a breakdown of their types:

 

1. Taper Tap

   
   

   • Gradual cutting action

   • Used to start threading holes

   • 7–10 thread chamfer

2. Plug Tap

   • Most common type

   • Used after taper tap or on its own

   • 3–5 thread chamfer

3. Bottoming Tap

   • Cuts threads to the bottom of a blind hole

   • 1–2 thread chamfer

4. Spiral Point Tap (Gun Tap)

   • Pushes chips forward

   • Good for through-holes

5. Spiral Flute Tap

   • Pulls chips back

   • Best for blind holes

6. Forming (Roll) Tap

   • Forms threads by displacement, not cutting

   • No chips, ideal for soft materials

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🔧 Types of Dies (for cutting external threads)

1. Round Adjustable Die

   • Common type

   • Adjustable for slightly different fits

2. Split Die

   • Split to allow size adjustment

   • Held in a die stock

3. Solid Die (Button Die)

   • Fixed size

   • Strong and durable

4. Hex Die

   • Simple die for maintenance work

   • Can be turned with a wrench