Airtac PB Pen-type Cylinder PB12X125SU
The AirTAC Airtac PB Pen-type Cylinder PB12X125SU is a double-acting pen-size (mini) air cylinder with a Ø12mm bore and 125mm 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.
- BoreØ12 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM10×1.0
- CushionElastic bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PB Pen-type Cylinder PB12X125SU
The AirTAC PB12X125SU is a double-acting JIS pen-size mini cylinder engineered for high-frequency small-part motion. It provides 56.5 N of push and 46.7 N of pull at 0.5 MPa, driven through a 5 mm stainless steel piston rod with an M10x1.0 rod-end thread. The slim SUS304 round barrel keeps mass low for end-of-arm tooling, while the U option specifies a 90-degree side air inlet for flat plumbing along a machine frame.
Air enters via an M5x0.8 port, operating between 0.15-0.7 MPa at speeds of 50-800 mm/s. Deceleration relies on a fixed TPU bumper at each end rather than an adjustable air cushion. Because the -S code is present, a built-in piston magnet enables position feedback when paired with AirTAC reed or electronic switches.
Airtac PB Pen-type Cylinder PB12X125SU Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB12X125SU |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 125 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 300 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 56.5 N | 46.7 N |
| 0.7 MPa (max) | 79.1 N | 65.4 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 PB12X125SU
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×125 | 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 PB12X125SU Is Used
PCB Depaneling Router
Advances a cutting tool guide along a 125 mm path to singulate printed circuit boards, utilizing the U side inlet to keep pneumatic tubing flush against the router head.
Blister Pack Forming
Pushes a small forming die into plastic film with 56.5 N of thrust at 0.5 MPa, cycling rapidly while the S magnet confirms stroke completion for the PLC.
Lab Dispenser Positioning
Moves a 2.5 kg fluid dispensing valve vertically between reagent wells, relying on the SUS304 barrel to resist humidity and chemical splashes.
Is the Airtac PB Pen-type Cylinder PB12X125SU the Right Cylinder?
If you need less force, the 10 mm bore variant supplies 39.3 N push at 0.5 MPa; stepping up to the 16 mm bore yields 100.5 N. Confirm your ordering essentials: 12 mm bore, 125 mm stroke, M5x0.8 port, S magnet, and U 90-degree side inlet.
The thin 5 mm rod is designed strictly for coaxial thrust, so over this 125 mm stroke you should add an external linear bearing if the load risks deflecting. Additionally, a standard PB body does not hold position if air pressure drops or the valve centers, as the piston will drift; incorporate an external rod lock for fail-safe holding.
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 PB12X125SU FAQ
At 0.5 MPa this 12 mm bore cylinder generates 56.5 N push and 46.7 N pull. At the maximum operating pressure of 0.7 MPa, it produces 79.1 N push and 65.4 N pull. It operates on filtered air at 0.15-0.7 MPa with speeds of 50-800 mm/s.
No, a plain PB-type cylinder drifts when air is lost or the valve is centered. The fixed TPU bumper only decelerates the piston near the stroke end and does not act as a lock. You must add an external rod lock or mechanical stop to hold a load safely.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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