Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75S is a double-acting pen-size mini cylinder with a rear adjuster screw that shortens the retract end of the stroke. On a Ø10mm 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.
- BoreØ10 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 PBJ10X125-75S
The AirTAC PBJ10X125-75S is a double-acting, single-rod pen-size mini cylinder with a 75mm adjustable stroke window. A rear adjuster screw (M4x0.7) shortens the retract end, giving an effective stroke range of 50-125mm. The extend end remains fixed. It generates 39.3N push and 33N pull at 0.5MPa, matching standard PB force exactly. The 125mm length is non-standard for this 10mm bore (max standard 100mm), making it a made-to-order item.
The slim SUS304 stainless body saves space in tight jigs. It has a built-in piston magnet for reed or electronic switches, a fixed TPU bumper at each end, and an M5x0.8 port. The Ø4mm rod is for coaxial thrust; over long 125mm strokes add an external guide to prevent side-load damage. Good practice loads a cylinder to ~60% of rated force, so plan for about 24N of real work at 0.5MPa, or lifting roughly 2kg vertically with a 2:1 margin.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø10 mm |
| Rod diameter | Ø4 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 75 mm (50–125 mm) |
| Adjuster thread | M4×0.7 |
| 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 100 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 (Ø10mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 39.3 N | 33.0 N |
| 0.7 MPa (max) | 55.0 N | 46.2 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 PBJ10X125-75S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 10 | 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 PBJ10X125-75S Is Used
Changeover Fixtures
Dial in the exact retract distance on the machine when swapping product families, avoiding hardware changes.
Trial Stops
Fine-tune the back position during R&D testing to find the exact 50-125mm stopping point for a new assembly.
Variable-Depth Insert
Adjust the retract length on the fly for different depth requirements without replacing the cylinder.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75S the Right Cylinder?
Size both ways: a 12mm bore gives 56.5N push, while an 8mm bore offers less thrust. This 10mm bore provides 39.3N push at 0.5MPa. Remember that only the retract end is adjustable; the extend position is fixed. Always re-tighten the lock nut after setting the stroke to prevent vibration drift. Confirm your ordering essentials: 10mm bore, 125mm nominal stroke, 75mm window, S magnet, and mounting.
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 PBJ10X125-75S FAQ
The effective stroke range is 50-125mm. At 0.5MPa it gives 39.3N push and 33N pull. At the 0.7MPa maximum it gives 55N push and 46.2N pull. Adjusting the stroke does not change these forces.
The rear M4x0.7 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 S option adds a built-in piston magnet for reed or electronic switches.
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Related AirTAC PBJ Pen-Size Cylinders
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