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SHS Piston Head — Ball Bearing and Double O-Ring

SHS Piston Head — Ball Bearing and Double O-Ring

£8.95
£8.95
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DETAILS

SKU: 36953004
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SHS Piston Head with Ball Bearing and Double O-Ring — a bearing so the spring can turn, and two o-rings so the air cannot escape. Compression parts work as a set, never alone.

A spring under compression wants to twist. A bearing between the spring and the piston head lets it do that instead of winding the piston up with it.

The double o-ring is the other half. Two seals against the cylinder wall hold compression better than one, which is what makes a rebuilt gearbox consistent rather than merely loud.

Vent holes through the body let air out behind the head on the return stroke, so it is not fighting itself on the way back.

Specifications

Specification Detail
Type Piston head
Material CNC machined aluminium
Bearing Integrated ball bearing
Seal Double o-ring
Venting Ported body
Fits Standard AEG gearboxes
Sold as Single piston head

Good to know before you buy

Aluminium adds a little weight over a polymer head. On a very high rate of fire build that is a trade to think about.

Frequently asked questions

What does the bearing actually do?
It lets the spring rotate freely as it compresses, instead of transmitting that twist into the piston and the gearbox shell.

Why two o-rings rather than one?
Two sealing surfaces hold compression more reliably as the cylinder wears. It is the same reasoning as a double-sealed cylinder head.

Do I need a particular piston for it?
It uses the standard piston head thread found on most AEG pistons, but check yours before ordering if the build is unusual.

⚠ Check the piston head clears the cylinder head: a taller head on a short-stroked or bore-up build can bottom out and destroy both parts.
💡 Titan Forge Airsoft tip: Do not overtighten it. The thread is small and the head only needs to be firm against the piston face. Browse gearbox parts.