Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10 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 10mm fine-adjustable window — settable from 115 to 125mm, so you set the end position without changing hardware.
- BoreØ12 mm
- Nominal stroke125 mm
- Adjust window10 mm
- Effective range115–125 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 PBJ12X125-10
The AirTAC PBJ12X125-10 is a double-acting, double-rod pen-size mini cylinder with a 10mm adjustable stroke window. A rear adjuster screw (M5x0.8 thread) lets you trim the retract end, yielding an effective stroke range of 115-125mm. The extend end remains fixed.
Built with a SUS304 stainless barrel and a slim Ø5mm rod, it saves space in tight jigs. The M5x0.8 air port keeps the envelope small. A fixed TPU bumper cushions each end. Because the rod is only 5mm thick, use an external guide for off-axis loads over this 125mm length to prevent side-load wear.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 10 mm (115–125 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 PBJ12X125-10
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -10 | 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 PBJ12X125-10 Is Used
Changeover Fixtures
Tune the retract length on the fly when swapping product families, hitting the exact 115-125mm stop without machining new hard stops.
Trial Insertion Stops
Dial in the precise insertion depth for delicate pressing tasks, verifying the final 5mm of travel before locking the adjuster nut.
Variable-Depth Probes
Set sensor probe contact points across a batch of mixed-height parts by adjusting the back position rather than reordering hardware.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10 the Right Cylinder?
When sizing, note the adjacent bores: the Ø10 pushes 39.3N at 0.5 MPa, while the Ø16 pushes 100.5N. This PBJ12X125-10 provides a middle ground at 56.5N.
Remember that only the retract position is field-settable; the extend end is fixed. Always re-tighten the lock nut after setting the rear screw to prevent vibration drift. Confirm your ordering essentials: 12mm bore, 125mm nominal stroke, 10mm window, no magnet, and mounting style.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 115–125 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 PBJ12X125-10 FAQ
The effective stroke range is 115-125mm (nominal 125mm minus a 10mm window). The air port is M5x0.8 and the rod-end thread is M10x1.0.
A rear screw shortens the retract end only; the extend end is fixed. You set the position in the field, then re-tighten the lock nut so vibration does not drift the screw. The piston does not hold position on air loss, so use an external stop for fail-safe holding.
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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