Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-75S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-75S 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 75mm fine-adjustable window — settable from 50 to 125mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke125 mm
- Adjust window75 mm
- Effective range50–125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-75S
The AirTAC PBJ16X125-75S is a double-acting, single-rod pen-size mini cylinder featuring a 75mm adjustable window. A rear adjuster screw (M5x0.8 thread) shortens the retract end, yielding an effective stroke range of 50-125mm. The extend end remains fixed. Output force equals a standard PB body, delivering 100.5N push and 90.7N pull at 0.5MPa. The integrated -S magnet works with reed or electronic switches.
Built with a SUS304 stainless rod and barrel, this slim 16mm bore cylinder saves space in tight jigs. It uses an M5x0.8 air port and an M10x1.0 rod-end thread. A fixed TPU bumper cushions each end. Because the rod is only Ø5mm, plan for a safe working load of roughly 60N (about 60% of the 0.5MPa push force) and add an external guide for any off-axis loads.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-75S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-75S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 75 mm (50–125 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 PBJ16X125-75S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -75 | 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 PBJ16X125-75S Is Used
Variable-Depth Insertion
Dial in precise pressing depths on the fly. The 50-125mm retract window lets you test multiple insertion heights without machining new hard stops.
Quick Changeover Fixtures
Swap product variants on a packaging line rapidly. Turn the rear M5x0.8 adjuster to match the new part height and lock the nut for immediate production.
Trial Stop Positioning
Set temporary end-of-stroke limits during prototype tooling. Fine-tune the retract distance in seconds to find the exact 50-125mm operating point.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X125-75S the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5MPa; sizing down to a 12mm bore drops push to 56.5N, while this model offers the necessary thrust for denser tasks. Remember that only the retract position is field-settable—the extend end is fixed. After dialing in your 50-125mm range, securely re-tighten the lock nut to prevent vibration drift.
Confirm your ordering essentials: 16mm bore, 125mm nominal stroke, 75mm window, built-in S magnet, and your preferred mounting option (blank, LB, or FA). The thin Ø5mm rod handles coaxial thrust well but requires a linear bearing for side loads.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 50–125 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 PBJ16X125-75S FAQ
The effective stroke range is 50-125mm (125mm nominal minus a 75mm window). Forces are identical to a standard PB 16mm cylinder: 100.5N push and 90.7N pull at 0.5MPa, and 140.7N push and 126.9N pull at the 0.7MPa maximum.
A rear screw shortens only the retract end; the extend end is fixed. You must re-tighten the lock nut after setting to prevent vibration drift. The built-in -S magnet allows position sensing with either reed or electronic switches.
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Related AirTAC PBJ Pen-Size Cylinders
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