Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S is a double-acting, double-rod pen-size mini cylinder whose rear rod carries a stroke adjuster. On a Ø12mm bore it gives a nominal 125mm stroke with a 100mm fine-adjustable window — settable from 25 to 125mm, so you set the end position without changing hardware.
- BoreØ12 mm
- Nominal stroke125 mm
- Adjust window100 mm
- Effective range25–125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- 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 PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S
The AirTAC PBJ12X125-100S is a double-acting, double-rod pen-size mini cylinder with a 100mm adjustable window. A rear adjuster screw and lock nut shorten the retract end, giving an effective stroke range of 25-125mm. You can fine-tune the stroke on the machine without ordering new hardware. The extend end remains fixed.
Force matches the standard PB body exactly, so the adjuster imposes zero force penalty. The Ø5mm stainless steel rod and barrel resist corrosion, while the fixed TPU bumper decelerates travel at both ends. A built-in magnet works with reed or electronic switches. The M5x0.8 air port handles your supply, and the rod-end thread is M10x1.0.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 100 mm (25–125 mm) |
| Adjuster thread | M5×0.8 |
| Port size | M5×0.8 |
|---|---|
| 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 200 mm |
PBJ is a double-rod cylinder: the rear rod carries the stroke adjuster, which sets the stroke end within the adjustable window. Confirm the set position against the product label before installation.
Theoretical Output Force (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 46.7 N | 46.7 N |
| 0.7 MPa (max) | 65.4 N | 65.4 N |
The rear rod passes through the rear cover, so both piston faces lose rod area: push is shown at the annular-area value (conservative), lower than a single-rod PB push of the same bore. Size with a friction margin.
Model Code: Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -100 | Adjustable-stroke window in mm (10/20/30/40/50/75/100). |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
Fixed body — no separate back-cover code. Mounting accessories: LB, FA. Related PB-family variants: PB (fixed stroke), PBD (double rod), PBR (front-mount).
Where the Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S Is Used
Changeover Fixtures
Dial in the retract length from 25 to 125mm when switching production runs, eliminating the need to swap physical hard stops on the jig.
Trial Stops
Use the built-in magnet for position sensing while tweaking the rear screw to find the exact touch position for delicate probes.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S the Right Cylinder?
Size this 12mm bore against its neighbours.
Remember that only the retract end is adjustable; the extend position is fixed. Re-tighten the lock nut after setting the screw, as vibration can drift an unlocked adjuster. The Ø5mm rod is built for coaxial thrust, so over this 125mm stroke, add an external guide or linear bearing for any off-axis loads. Confirm your ordering essentials: 12mm bore, 125mm stroke, 100mm window, S magnet, and mounting choice.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 25–125 mm
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Access to the rear adjuster screw
- ✓ 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 Set the adjuster, then re-lock the check nut.
- check Double rod: the rear rod carries the stroke adjuster.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-100S FAQ
The effective stroke range is 25-125mm.
A rear screw shortens the retract end while the extend end stays fixed; re-tighten the lock nut after setting. A plain cylinder does not hold position on air loss—the piston drifts and the fixed TPU bumper only decelerates near the end. Use an external rod lock for a fail-safe hold.
Authorized Export Seller
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 PBJ Pen-Size Cylinders
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