Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-50
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-50 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 50mm fine-adjustable window — settable from 75 to 125mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke125 mm
- Adjust window50 mm
- Effective range75–125 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 PBJ16X125-50
The AirTAC PBJ16X125-50 is a double-acting, double-rod pen-size mini cylinder with a 50 mm adjustable-stroke window. A rear adjuster screw and lock nut let you shorten the retract end, giving an effective stroke range of 75-125 mm. The extend end remains fixed.
This slim SUS304 stainless build features a fixed TPU bumper at each end and an M5x0.8 air port. The Ø5 mm piston rod carries an M10x1.0 rod-end thread.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-50 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-50 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 50 mm (75–125 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 PBJ16X125-50
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -50 | 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 PBJ16X125-50 Is Used
Variable-Depth Insertion
Dial in precise retract stops for pressing pins or plugs to different depths on a single fixture without swapping hardware.
Quick Changeover Jigs
Adjust the 75-125 mm effective stroke rapidly during product changeovers to accommodate new part heights.
Trial Positioning Stops
Fine-tune the back position during machine commissioning to find the exact travel needed before final lockdown.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-50 the Right Cylinder?
When sizing, note the neighbouring bores: a 12 mm PB pushes 56.5 N, while a 16 mm pushes 100.5 N at 0.5 MPa. This PBJ16X125-50 provides substantial force for tight jigs. Remember that only the retract position is field-settable; the extend end is fixed. Always re-tighten the lock nut after setting the M5x0.8 adjuster screw, as vibration can drift an unlocked mechanism.
Confirm your ordering essentials: 16 mm bore, 125 mm nominal stroke, 50 mm window, no magnet, and mounting choice. The thin Ø5 mm rod is built for coaxial thrust; over this 125 mm stroke or with off-axis loads, add an external guide or linear bearing to prevent side-load damage.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 75–125 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 PBJ16X125-50 FAQ
The effective stroke range is 75-125 mm. At 0.5 MPa, push is 100.5 N and pull is 90.7 N. At the maximum 0.7 MPa operating pressure, push is 140.7 N and pull is 126.9 N. These figures match a standard PB cylinder of the same bore.
A rear M5x0.8 adjuster screw shortens the retract end, while the extend end stays fixed; re-tighten the lock nut after setting. A plain cylinder does not hold position on air loss—the piston drifts and the fixed TPU bumper only decelerates near stroke end. Use an external stop or rod lock 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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