AEG Cylinder Polishing: Inspection and Safe Limits

Cylinder polishing is not a default AEG upgrade. First clean and inspect the cylinder. If the surface is coated, plated, deeply scored, out of round or otherwise damaged, replacement may be safer than removing material.

Inspect before polishing

• Clean the bore with materials suitable for the cylinder finish.
• Check for scratches, corrosion, flaking, dents and edge damage.
• Inspect the piston-head O-ring for cuts, swelling or excessive drag.
• Confirm the cylinder is the correct type for the build.

Do not change the geometry

Abrasive work can remove coatings, enlarge the bore or create an uneven surface. If light polishing is appropriate for an uncoated serviceable cylinder, use a controlled method and stop as soon as the surface is clean and uniform. Keep all abrasive residue out of the gearbox.

Test the system, not the shine

A reflective surface does not prove a better seal. Recheck O-ring movement and compression, lubricate only as required for the selected materials, and verify the assembled AEG with a chronograph.

For the complete seal path, see the AEG air-volume and compression guide.