Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X140-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X140-20S 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 140mm stroke with a 20mm fine-adjustable window — settable from 120 to 140mm, so you set the end position without changing hardware.
- BoreØ12 mm
- Nominal stroke140 mm
- Adjust window20 mm
- Effective range120–140 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 PBJ12X140-20S
The AirTAC PBJ12X140-20S is a double-acting, pen-size mini cylinder with a 20mm adjustable-stroke window. A rear screw and lock nut shorten the retract end, giving an effective stroke range of 120-140mm. The extend end remains fixed. The bore is 12mm, the air port is M5x0.8, and the rod-end thread is M10x1.0.
A built-in magnet (-S) works with reed or electronic switches. The Ø5mm stainless rod and barrel suit tight jigs. The fixed TPU bumper decelerates the last few mm of travel. For real tooling mass at higher speeds, meter-out the exhaust or add an external shock absorber. The thin rod is for coaxial thrust; over long strokes add an external guide to prevent side load damage.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X140-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X140-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 140 mm |
| Adjustable window | 20 mm (120–140 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 PBJ12X140-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×140 | Nominal stroke length in mm. |
| -20 | 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 PBJ12X140-20S Is Used
Changeover Fixtures
Quickly tune the 120-140mm retract length on-site for different part heights without swapping hardware.
Trial Stops
Dial in the exact end-of-stroke position during prototype runs before locking the nut for production.
Variable Insertion
Set precise insertion depths on the fly for multiple press operations using the 20mm adjustment window.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ12X140-20S the Right Cylinder?
Stepping down to a 10mm bore drops push to 39.3N, while a 16mm bore raises it to 100.5N. The rear adjuster only alters the retract position; re-tighten the lock nut after setting to prevent vibration drift. Confirm ordering essentials: 12mm bore, 140mm nominal stroke, 20mm window, S magnet, and mounting.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 120–140 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 PBJ12X140-20S FAQ
The effective stroke range is 120-140mm. At 0.5MPa, push force is 56.5N and pull is 46.7N. At the 0.7MPa maximum, push is 79.1N and pull is 65.4N.
A rear M5x0.8 adjuster screw shortens the retract end only; the extend end is fixed. Re-tighten the lock nut after setting. The -S suffix means a built-in magnet for 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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