Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-40S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-40S 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 40mm fine-adjustable window — settable from 85 to 125mm, so you set the end position without changing hardware.
- BoreØ10 mm
- Nominal stroke125 mm
- Adjust window40 mm
- Effective range85–125 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 PBJ10X125-40S
The AirTAC PBJ10X125-40S is a JIS pen-size double-acting mini cylinder with a 40mm adjustable window. A rear screw and lock nut shorten the retract end, giving an effective stroke range of 85-125mm. The extend end remains fixed. This 125mm length is a non-standard made-to-order stroke exceeding the 100mm maximum standard for this 10mm bore.
Output force matches a standard PB cylinder, delivering 39.3N push and 33N pull at 0.5MPa. The slim body features a SUS304 stainless rod and barrel, plus a fixed TPU bumper at each end. The M5x0.8 port and built-in magnet for reed or electronic switches complete this space-saving design. Plan for a safe working load of about 24N, which is roughly 60% of the 0.5MPa push force.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-40S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-40S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø10 mm |
| Rod diameter | Ø4 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 40 mm (85–125 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 PBJ10X125-40S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 10 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -40 | 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 PBJ10X125-40S Is Used
Changeover Fixtures
Dial in the retract distance from 85 to 125mm when swapping product families on a shared jig without machining new stops.
Variable-Depth Insertion
Set precise press-in depths on the machine. The rear M4x0.7 adjuster allows exact positioning without ordering new hardware.
Trial Positioning Stops
Use the 40mm window to test end-of-stroke positions dynamically during prototyping before finalizing a fixed-length design.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-40S the Right Cylinder?
For sizing context, stepping down to a 12mm bore yields 56.5N push at 0.5MPa, while this 10mm bore provides 39.3N push. If you need to lift a part vertically, halving the 0.5MPa force gives a 2:1 safety margin, meaning it can lift about 2kg. Remember that only the back position is tunable; the extend end is fixed. Always re-tighten the lock nut after setting your range, as vibration can drift an unlocked screw. Confirm your ordering essentials: 10mm bore, 125mm stroke, 40mm window, S magnet, and any LB or FA mount.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 85–125 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 PBJ10X125-40S FAQ
The effective stroke range is 85-125mm. At 0.5MPa, push force is 39.3N and pull is 33N. At the 0.7MPa maximum, push is 55N and pull is 46.2N. Adjusting the stroke does not alter these forces.
The rear M4x0.7 screw shortens only the retract end; the extend end is fixed. Re-tighten the lock nut after setting to prevent vibration drift. The S suffix means a built-in magnet for reed or electronic switches.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Related AirTAC PBJ Pen-Size Cylinders
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