Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-20
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-20 is a double-acting, double-rod pen-size mini cylinder whose rear rod carries a stroke adjuster. On a Ø16mm bore it gives a nominal 125mm stroke with a 20mm fine-adjustable window — settable from 105 to 125mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke125 mm
- Adjust window20 mm
- Effective range105–125 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 PBJ16X125-20
The AirTAC PBJ16X125-20 is a double-acting, double-rod pen-size mini cylinder with a 20mm adjustable stroke window. A rear adjuster screw (M5x0.8 thread) shortens the retract end, giving an effective stroke range of 105 to 125mm. The extend end remains fixed. The slim SUS304 stainless body saves space in tight jigs.
Air ports are M5x0.8 and the rod-end thread is M10x1.0. A fixed TPU bumper cushions each end. Because the stroke is long and the rod is a slender Ø5mm, use an external linear bearing for any off-axis loads. The adjuster is free of any force penalty, so you can tune the retract distance on the fly without downgrading thrust capacity.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-20 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-20 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 20 mm (105–125 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 (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 90.7 N | 90.7 N |
| 0.7 MPa (max) | 126.9 N | 126.9 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 PBJ16X125-20
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×125 | 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 PBJ16X125-20 Is Used
Changeover Fixtures
Dial in the retract distance from 105 to 125mm during product changeovers to hit new stop positions without machining new hard stops.
Trial Insertion Stops
Fine-tune the back position for variable-depth press or insertion tasks, locking the nut once the exact depth is found.
End-of-Arm Tooling
Fit the slim 16mm stainless body into tight robotic grippers where a fixed length would fail to clear adjacent tooling.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-20 the Right Cylinder?
Remember that only the retract position is settable here—the extend end is fixed. After dialing in your 105-125mm range, re-tighten the lock nut so vibration does not drift the screw. Confirm your ordering essentials: 16mm bore, 125mm nominal stroke, 20mm window, no magnet, and your preferred mounting.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 105–125 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 PBJ16X125-20 FAQ
The effective stroke range is 105-125mm. It uses an M5x0.8 air port.
A rear screw shortens only the retract end; the extend end is fixed. You set the length on the machine, then must re-tighten the lock nut to prevent vibration drift. This cylinder has no magnet, so it cannot support 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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