Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S is a double-acting pen-size mini cylinder with a rear adjuster screw that shortens the retract end of the stroke. On a Ø16mm 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.
- BoreØ16 mm
- Nominal stroke125 mm
- Adjust window10 mm
- Effective range115–125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S
The AirTAC PBJ16X125-10S is a double-acting, single-rod pen-size mini cylinder with a 10mm adjustable stroke window. A rear adjuster screw and lock nut shorten the retract end, giving an effective stroke range of 115mm to 125mm. The extend end remains fixed. Output force is identical to a standard PB cylinder of this bore, delivering 100.5N push and 90.7N pull at 0.5MPa. It features a Ø5mm piston rod, an M5x0.8 air port, and an M10x1.0 rod-end thread.
The SUS304 stainless barrel and slim body suit tight jigs and end-of-arm tooling. A fixed TPU bumper decelerates the last few millimeters of travel. The -S suffix denotes a built-in piston magnet for position sensing with reed or electronic switches. Because the rod is only Ø5mm, use an external guide or linear bearing for off-axis loads over this long 125mm stroke. For vertical lifting, plan for about 5.1kg of real part weight with a 2:1 margin, or roughly 60N of safe working load at 0.5MPa.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 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 |
The adjuster shortens only the retract end; the extend end is fixed. Force is unchanged from the standard PB double-acting cylinder. Confirm the set position against the product label before installation.
Theoretical Output Force (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 100.5 N | 90.7 N |
| 0.7 MPa (max) | 140.7 N | 126.9 N |
Adjusting the stroke does not change output force — these are the same values as the standard PB double-acting cylinder of the same bore. Size with a friction margin.
Model Code: Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | 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 PBJ16X125-10S Is Used
Changeover Fixtures
Dial in the retract position from 115mm to 125mm during product changeovers without swapping hardware.
Trial Insertion Stops
Fine-tune the rear screw for variable-depth press fits, locking the nut once the optimal depth is found.
Vertical Lift Jigs
Lift up to 5.1kg vertically at 0.5MPa with a 2:1 safety margin, guided by the built-in magnet for sensing.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-10S the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5MPa. Sizing down, a 12mm bore gives 56.5N push, while sizing up is not applicable within the PBJ pen-size range. Remember that only the retract position is field-settable; the extend end is fixed. After dialing in your 115-125mm range, re-tighten the lock nut to prevent vibration drift. Confirm your ordering essentials: 16mm bore, 125mm nominal stroke, 10mm window, S magnet, and any LB or FA mount.
Note that a plain PBJ does not hold position on air loss; the piston drifts. Use an external stop or rod lock for fail-safe load holding. Also, the fixed TPU bumper only decelerates the final few millimeters. At high cycle speeds with heavy tooling mass, it will bottom out, so meter-out the exhaust or fit an external shock absorber.
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 The adjuster shortens the retract end only.
- 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 PBJ16X125-10S FAQ
The effective stroke range is 115mm to 125mm. Force equals a standard PB 16mm cylinder: 100.5N push and 90.7N pull at 0.5MPa, or 140.7N push and 126.9N pull at the 0.7MPa maximum.
The rear screw shortens only the retract end; the extend end is fixed. After setting your stroke, re-tighten the lock nut to prevent vibration drift. The -S magnet works with reed or electronic switches.
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