Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-30
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-30 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 30mm fine-adjustable window — settable from 95 to 125mm, so you set the end position without changing hardware.
- BoreØ12 mm
- Nominal stroke125 mm
- Adjust window30 mm
- Effective range95–125 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 PBJ12X125-30
The AirTAC PBJ12X125-30 is a double-acting, double-rod pen-size mini cylinder featuring a 30mm adjustable-stroke window. A rear M5x0.8 adjuster screw lets you trim the retract end, yielding an effective stroke range of 95-125mm. The extend end remains fixed.
Built with a SUS304 stainless rod and barrel, this slim 12mm bore unit saves space in tight jigs. It uses an M5x0.8 air port and an M10x1.0 rod-end thread. The fixed TPU bumper decelerates the last few millimeters of travel.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-30 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-30 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 30 mm (95–125 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 PBJ12X125-30
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -30 | 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 PBJ12X125-30 Is Used
Changeover Fixtures
Quickly tune the 95-125mm retract length during product changeovers. Set the exact stop position for different part heights without machining new hardware.
Trial Insertion Stops
Dial in the precise depth for press or insertion tasks. The rear adjuster allows fine-tuning the end position on the machine during commissioning.
Variable Depth Pick
Adjust the retract distance for end-of-arm tooling picking varied component sizes. The slim stainless body fits tight robotic envelopes.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-30 the Right Cylinder?
Remember that only the back position is settable; the extend stroke is fixed. Always re-tighten the lock nut after setting your 95-125mm range to prevent vibration drift.
Confirm your ordering essentials: 12mm bore, 125mm nominal stroke, 30mm window, no magnet, and mounting choice. The Ø5mm rod is built for coaxial thrust; over this 125mm length, add an external linear bearing if any off-axis load is present. A plain cylinder does not hold position on air loss, so fit an external stop for fail-safe load holding.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 95–125 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 PBJ12X125-30 FAQ
The effective stroke range is 95-125mm. At 0.5MPa, push force is 56.5N and pull is 46.7N. At the maximum 0.7MPa operating pressure, push is 79.1N and pull is 65.4N. Adjusting the stroke does not alter these forces.
A rear M5x0.8 screw shortens the retract end, while the extend end is fixed. You set the desired length within the 30mm window, then re-tighten the lock nut to prevent vibration drift. This cylinder has no sensor magnet.
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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