Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10S 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 PBJ12X125-10S
The AirTAC PBJ12X125-10S is a JIS pen-size double-acting adjustable-stroke mini cylinder with a built-in magnet. A rear adjuster screw (M5x0.8) and lock nut shorten the retract end, giving an effective stroke range of 115-125 mm. The extend end remains fixed.
The SUS304 stainless barrel and slim body save space in tight jigs. It uses an M5x0.8 air port and a fixed TPU bumper at each end. The Ø5 mm rod handles coaxial thrust; over long strokes or off-axis loads, add an external guide to prevent side load damage.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10S |
|---|---|
| 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 PBJ12X125-10S
| 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 PBJ12X125-10S Is Used
Variable-Depth Insertion
Dial in precise downward travel for pressing or inserting pins without swapping hardware.
Quick Changeover Fixtures
Fine-tune the retract stop on the machine to match new part heights instantly.
Trial Stroke Setup
Safely test extended reach limits in lab jigs before locking the final position.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X125-10S the Right Cylinder?
Remember that only the retract position is tunable, so set your length and re-tighten the lock nut to prevent vibration drift. The fixed TPU bumper only decelerates the last few mm, so at mid-to-high speeds with real tooling mass, meter-out the exhaust or add an external shock absorber. Confirm ordering essentials: 12 mm bore, 125 mm nominal stroke, 10 mm window, S magnet, and mounting.
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 PBJ12X125-10S FAQ
The effective stroke range is 115-125 mm, adjusted via the rear screw.
The rear M5x0.8 screw shortens only the retract end; the extend end is fixed. Re-tighten the lock nut after setting to prevent drift. The -S denotes a built-in piston magnet compatible with AirTAC reed or electronic switches.
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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