Airtac PB Pen-type Cylinder PB6X25SRLB
The AirTAC Airtac PB Pen-type Cylinder PB6X25SRLB is a double-acting pen-size (mini) air cylinder with a Ø6mm bore and 25mm stroke. Its slim round barrel and back cover are stainless steel, the M5×0.8 ports keep plumbing compact, and the fast, low-friction piston suits high-cycle small-part handling.
- BoreØ6 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM5×0.8
- CushionElastic bumper (both ends)
About the Airtac PB Pen-type Cylinder PB6X25SRLB
The AirTAC PB6X25SRLB is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency small-part motion. It delivers a 14.2 N push and 10.6 N pull at 0.5 MPa, utilizing a slim SUS304 stainless steel round barrel and piston rod to resist damp or mildly corrosive environments. This build saves valuable space and payload on light end-of-arm tooling where larger actuators cannot fit.
Equipped with a built-in magnet (-S), this unit supports AirTAC reed or electronic switches for precise position detection. The R axial inlet keeps plumbing in-line, while the LB mounting bracket provides a robust attachment point. It features an M5x0.8 port and a fixed TPU bumper at each end that decelerates the piston over the final few millimeters of travel.
Airtac PB Pen-type Cylinder PB6X25SRLB Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB6X25SRLB |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø6 mm |
| Rod diameter | Ø3 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Elastic bumper (both ends) |
| Max standard stroke | Up to 60 mm |
Specifications follow the official AirTAC PB pen-size datasheet. Piston rod and barrel are stainless steel. Confirm bore, stroke and back-cover option against the product label before installation.
Theoretical Output Force (Ø6mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 14.2 N | 10.6 N |
| 0.7 MPa (max) | 19.8 N | 14.8 N |
Values are taken from the AirTAC PB thrust table. Because pull acts on the rod-side annular area, pull force is always lower than push. Actual usable force is reduced by friction — size with a margin.
Model Code: Airtac PB Pen-type Cylinder PB6X25SRLB
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 6 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| CB / U / R | Back cover: CB double clevis, U 90° side inlet, R axial inlet (bore-dependent). |
Mounting accessories: LB, FA, CJ. Related PB-family variants: PSB (single-acting push), PTB (single-acting pull), PBD (double rod), PBJ (adjustable stroke), PBR (front-mount).
Where the Airtac PB Pen-type Cylinder PB6X25SRLB Is Used
PCB Pick-and-Place
Drives a tiny vacuum gripper to lift and position delicate electronic circuit boards within a dense SMT assembly machine.
Lab Dispenser Actuation
Moves a micro-valve for precise chemical reagent dosing in automated analytical laboratory equipment.
Small Carton Flap Folding
Tucks in minor flaps on lightweight pharmaceutical cartons moving through a high-speed packaging line.
Is the Airtac PB Pen-type Cylinder PB6X25SRLB the Right Cylinder?
When sizing this actuator, plan for a safe working load of about 9 N (roughly 60% of the 14.2 N theoretical push at 0.5 MPa) to account for seal friction and smooth travel. This equates to lifting approximately 0.7 kg vertically with a sane 2:1 safety margin. If your task requires less force, step down to the Ø4 bore (6.3 N push); if you need more power, step up to the Ø10 bore (39.3 N push).
Confirm your ordering essentials: 6 mm bore, 25 mm stroke, M5x0.8 port, S magnet, R axial inlet, and LB mount. Note that a plain cylinder drifts when air is lost or the valve is centered, so an external stop or rod lock is required for fail-safe load holding. Additionally, the slender Ø3 mm rod is built for coaxial thrust, so add an external guide if handling off-axis loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Slim pen body vs. a standard round cylinder
- ✓ Back cover: CB / U / R inlet direction
- ✓ Magnet (S) for sensors?
- ✓ Mounting: LB / FA / CJ or front thread
- ✓ Keep the load coaxial — avoid side load
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 0.7 MPa operating pressure.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
- check Fit dust caps to ports during long-term storage.
- check Installation by qualified personnel per AirTAC docs.
Airtac PB Pen-type Cylinder PB6X25SRLB FAQ
At 0.5 MPa this 6 mm bore cylinder provides 14.2 N of push and 10.6 N of pull. At the maximum operating pressure of 0.7 MPa, the force increases to 19.8 N push and 14.8 N pull. It operates between 0.15-0.7 MPa at speeds of 50-800 mm/s.
The cushioning is a fixed TPU bumper at each end that absorbs impact over the last few millimeters and cannot be field-adjusted. For high-speed cycles with real tooling mass, meter-out the exhaust or add an external shock absorber. The cylinder will not hold a load if air pressure is lost; you must use an external rod lock for fail-safe positioning.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC PB Pen-Size Cylinders
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