Airtac PB Pen-type Cylinder PB12X125SULB
The AirTAC Airtac PB Pen-type Cylinder PB12X125SULB 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 PB12X125SULB
The AirTAC PB12X125SULB is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency motion. It features a 12mm bore and a 125mm stroke, generating 56.5 N of push and 46.7 N of pull at 0.5 MPa. The slim SUS304 stainless steel barrel and piston rod provide excellent durability in damp or mildly corrosive environments, keeping weight low for end-of-arm tooling.
This configuration includes a built-in piston magnet for position sensing with AirTAC reed or electronic switches. It uses a 90-degree U side air inlet for flat plumbing and an LB mounting bracket for secure attachment. The M5x0.8 port and M10x1.0 rod-end thread are set by the bore. A fixed TPU bumper at each end decelerates the piston near stroke end, though it is not an adjustable air cushion or a locking device.
Airtac PB Pen-type Cylinder PB12X125SULB Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB12X125SULB |
|---|---|
| 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 PB12X125SULB
| 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 PB12X125SULB Is Used
PCB Depaneling Router
Actuates a cutting head or clamping jaw in a compact routing fixture, utilizing the 125mm stroke to clear the work area while the SUS304 build handles residual machining mist.
Package Sorting Diverter
Pushes lightweight parcels off a narrow conveyor belt where space is restricted; the LB bracket secures the body while the U side inlet keeps pneumatic plumbing flat against the frame.
Lab Sample Dispenser
Drives a small pipetting or capping head in analytical equipment, benefiting from the fast 50-800 mm/s speed range and the built-in S magnet for electronic switch position feedback.
Is the Airtac PB Pen-type Cylinder PB12X125SULB the Right Cylinder?
When sizing this 12mm bore actuator, stepping down to the 10mm bore yields 39.3 N of push at 0.5 MPa, while stepping up to the 16mm bore provides 100.5 N.
Because the thin Ø5 mm piston rod is designed for coaxial thrust rather than side loading, adding an external guide or linear bearing is recommended over this 125mm stroke to prevent rod deflection. Note that a plain PB cylinder does not hold its position if air pressure is lost or the valve is centered; the piston will drift, so an external rod lock is required for fail-safe holding. Confirm your ordering essentials: 12mm bore, 125mm stroke, S magnet, U inlet, and LB mount.
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 PB12X125SULB 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 proof pressure of 1.2 MPa, and the speed range is 50-800 mm/s.
It uses a fixed TPU bumper at each end that decelerates the piston over the last few millimeters; it is not an adjustable air cushion. A plain PB cylinder does not hold its load when air is lost or the valve is centered, as the bumper is not a lock or brake. For fail-safe holding, an external stop or rod lock is required.
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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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