Billet Pierce

Norris manufactures its cylinders using the Hot Billet Pierce method of manufacture.

Porous Mass Patent Step 1

Step 1

Steel Billets of Chromium Molybdenum Steel are cut into Mults.
   
Porous Mass Patent Step 2

Step 2

Mults are preheated in an induction heater until near molten state.
   
Porous Mass Patent Step 3

Step 3

A Robotic arm places the mult into a piercing press.
   
Porous Mass Patent Step 4

Step 4

The "mult" is then pierced.
   
Porous Mass Patent Step 5

Step 5

The pierced mult is pushed through a series of roller dies creating a cylinder with a smooth uniform wall.