The PB6X5-SR is a highly compact, single-acting spring-return “pen/pencil” cylinder from AirTAC’s PB series. With its tiny footprint and short stroke, it is ideal for applications where space is very tight and small precise actuation is needed. Often used in assemblies, instruments, or devices needing small movements with consistent, reliable return.
Key Features
Single-acting, spring-return design — extends with air, retracts via spring.
Very small bore & stroke (6 mm bore × 5 mm stroke) for precision micro-actuation.
Stainless steel piston rod & compact / round body, good for corrosion resistance and durability.
JIS standard cylinder series (compact design, lightweight) for miniaturized usage.
Spring retract, usually with a rubber/spring buffer to absorb end-of-stroke impact.
Specifications
Parameter
Details
Model
PB6X5-SR
Type / Acting
Single-acting, spring return
Bore Size
6 mm
Stroke Length
5 mm
Operating Pressure
~0.15 to 0.8 MPa (≈1.5 to 8 bar)
Port / Thread Size
M5 thread
Body Material
Anodized aluminum alloy
Rod Material
Stainless Steel (SUS304)
Seal Material
NBR (nitrile rubber)
Temperature Range
-20 °C to +80 °C
Mounting
Front mounting (often via front cover) — limited mounting options
Dimensions
~16 mm × 16 mm × 41.5 mm (retracted)
Weight
~0.12 kg (without accessories)
Max Speed / Response
Up to ~500 mm/s (depending on load)
Applications
Here are some typical uses for PB6X5-SR:
Small precision devices (e.g. PCB component inserters)
Actuation in medical equipment where travel is tiny and cleanliness/corrosion resistance matters
Optical / lens positioning or sensor triggering
Light-duty automation tasks where weight and space are constrained
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