Airtac PB Pen-type Cylinder PB12X125U
The AirTAC Airtac PB Pen-type Cylinder PB12X125U 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 PB12X125U
The AirTAC PB12X125U is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency small-part motion. It utilizes a slim SUS304 stainless steel barrel and piston rod to resist damp or mildly corrosive environments while keeping end-of-arm tooling exceptionally light. Delivering 56.5 N of push force at 0.5 MPa, this 12 mm bore model provides a practical 125 mm stroke. The U option specifies a 90-degree side air inlet, enabling flat plumbing in tight machine envelopes.
Air enters via the M5x0.8 port, driving the Ø5 mm rod with its M10x1.0 end thread. Because the rod is only 5 mm thick, it is built for coaxial thrust rather than side loading; over this 125 mm span, adding an external linear bearing prevents binding. The end caps feature a fixed TPU bumper that decelerates the piston near stroke limits, though it is not a lock. If air pressure drops, the rod will drift, requiring an external stop for fail-safe holding.
Airtac PB Pen-type Cylinder PB12X125U Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB12X125U |
|---|---|
| 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 PB12X125U
| 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 PB12X125U Is Used
PCB Depaneling Router
Extends a lightweight cutting guide along a 125 mm path inside an electronics assembly fixture, utilizing the slim stainless body to fit between dense conveyor lines.
Carton Flap Folder
Pushes small cardboard flaps closed on a packaging machine where the 90-degree U inlet allows airlines to run flush against the main frame without snagging.
Lab Sample Dispenser
Actuates a small pipette or valve head over a 125 mm stroke in a wet analytical instrument, benefiting from the SUS304 rod resistance to mild chemical splashes.
Is the Airtac PB Pen-type Cylinder PB12X125U the Right Cylinder?
If your application demands less force, stepping down to the Ø10 bore yields 39.3 N push at 0.5 MPa; if you need more thrust, the Ø16 bore provides 100.5 N push at 0.5 MPa.
To order, confirm the 12 mm bore, 125 mm stroke, M5x0.8 porting, and the U 90-degree side inlet. This unit lacks the -S magnet, so position sensing is not available without changing the model code. Remember that the fixed TPU bumper only absorbs impact over the final few millimeters; for higher speed tooling mass, meter-out the exhaust or fit an external shock absorber.
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 PB12X125U FAQ
At 0.5 MPa, the push force is 56.5 N and the pull force is 46.7 N. At the maximum operating pressure of 0.7 MPa, the push force is 79.1 N and the pull force is 65.4 N. The operating pressure range is 0.15-0.7 MPa, with a speed of 50-800 mm/s.
No, a plain PB cylinder will drift if air is lost or the valve is centered. The fixed TPU bumper at each end only decelerates the piston near the stroke limits; it does not act as a brake. An external rod lock or mechanical stop is required for fail-safe load holding.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PB Pen-Size Cylinders
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