Airtac PB Pen-type Cylinder PB12X125R
The AirTAC Airtac PB Pen-type Cylinder PB12X125R 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 PB12X125R
The AirTAC PB12X125R is a JIS pen-size double-acting single-rod mini cylinder engineered for tight jigs and lightweight end-of-arm tooling. It generates 56.5 N of push and 46.7 N of pull at 0.5 MPa, utilizing a slim SUS304 stainless steel barrel and piston rod to resist damp or mildly corrosive industrial environments. The R suffix specifies an axial air inlet for straightforward in-line plumbing.
This 12 mm bore unit travels a 125 mm stroke and features an M5x0.8 port plus an M10x1.0 rod-end thread. It relies on a fixed TPU bumper at each end to decelerate the last few millimeters of travel. Because the rod is a slender 5 mm diameter, you should maintain coaxial thrust and add an external linear bearing if the application involves any off-axis loading over this length.
Airtac PB Pen-type Cylinder PB12X125R Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB12X125R |
|---|---|
| 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 PB12X125R
| 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 PB12X125R Is Used
PCB Depaneling Router
Actuates a routing tool guide on an electronics assembly line, where the compact stainless body handles mildly humid wash-down environments and the 125 mm stroke clears the cutting axis.
Package Sorting Diverter
Pushes lightweight parcels onto a secondary packaging belt using the 56.5 N extend force, with the axial R inlet keeping pneumatic plumbing flush against the conveyor frame.
Lab Sample Indexing
Moves centrifuge tube racks between testing stations in diagnostic equipment, benefiting from the fast 50-800 mm/s speed and the slim profile that fits within crowded analytical instruments.
Is the Airtac PB Pen-type Cylinder PB12X125R the Right Cylinder?
When sizing this actuator, stepping down to the 10 mm bore yields 39.3 N of push at 0.5 MPa, while stepping up to the 16 mm bore provides 100.5 N, letting you tune the force to your exact fixture requirements.
A standard PB body does not hold its position if air pressure drops or the valve is centered; the piston will drift, and the bumper only decelerates near the stroke end. For fail-safe holding, specify an external rod lock or mechanical stop. To order, confirm the 12 mm bore, 125 mm stroke, M5x0.8 porting, the R axial inlet, and the absence of a sensor magnet.
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 PB12X125R FAQ
At 0.5 MPa this 12 mm bore cylinder provides 56.5 N push and 46.7 N pull. At the maximum operating pressure of 0.7 MPa, it yields 79.1 N push and 65.4 N pull. It operates between 0.15-0.7 MPa at speeds of 50-800 mm/s.
It uses a fixed TPU bumper at each end that decelerates the piston over the last few millimeters, but this is not adjustable or a locking brake. For high mass at mid-speed, meter-out the exhaust or add an external shock absorber. If air is lost, the piston drifts, so an external rod lock is required to hold a load.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Related AirTAC PB Pen-Size Cylinders
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