All Process of ICBM™︎, Episode 6 – from material to finish

In previous episodes, we explained that ICBM™︎ is not a single machining trick. In this episode, we show the entire process from start to finish. What matters most is not each step by itself, but the order in which they are performed.

Step 1 — Aluminum sleeve, machined from solid

ICBM™︎ starts with aluminum material. The sleeve is precisely turned on a CNC lathe to create the foundation for all following processes.

Step 2 — Ports are machined before surface treatment

Port shapes are machined on a horizontal machining center while the sleeve is still bare aluminum. Accuracy at this stage defines the character of the engine.

Step 3 — Surface treatment is prepared, not emphasized

The sleeve moves to the surface treatment process. This step is essential, but it is designed as part of the total system rather than a standalone feature.

Step 4 — The cylinder barrel is machined to receive the sleeve

In parallel, the cylinder barrel is machined on a vertical machining center. The bore is enlarged precisely so the treated sleeve can be installed correctly.

Step 5 — The treated sleeve is pressed into the cylinder

Using a press machine, the plated sleeve is inserted into the cylinder barrel. This is done without forcing distortion, based on material behavior and process design.

Step 6 — Ports are matched by hand

After insertion, each port is aligned by hand using rotary tools. This restores smooth gas flow and connects the sleeve and barrel as one structure.

Step 7 — Diamond plateau honing defines the bore surface

The bore is finished on a honing machine using diamond stones. This step creates the final running surface for the piston rings.

Step 8 — Bridge relief to control stress and distortion

Material is relieved around the internal bridges (bridged ports). This reduces local stress concentration and helps maintain bore stability during operation.

Step 9 — The cylinder top face is surface-ground

The top face of the cylinder is finished on a surface grinding machine. This ensures proper sealing and completes the cylinder as an engine component.

Step 10 — Final inspection before becoming an engine

Dimensions, surface condition, and overall balance are checked. Only after inspection does the cylinder leave our workshop.

The ICBM™︎ process works only because every step exists in the correct order. It is not a single trick, but a complete engineering sequence.