Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-50S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-50S 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 50mm fine-adjustable window — settable from 75 to 125mm, so you set the end position without changing hardware.
- BoreØ10 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 PBJ10X125-50S
The AirTAC PBJ10X125-50S is a double-acting, single-rod pen-size mini cylinder with a 50mm adjustable window. A rear adjuster screw (M4x0.7) and lock nut shorten the retract end, giving an effective stroke range of 75 to 125mm. Because the extend end is fixed, layout planning must account for the back position being the only variable. This 125mm stroke exceeds the 100mm standard maximum for the 10mm bore, classifying it as a made-to-order item.
Output force matches the standard PB series exactly, yielding 39.3N push and 33N pull at 0.5MPa. The build features a SUS304 stainless rod and barrel, a fixed TPU bumper at each end, and a built-in magnet (-S) for reed or electronic switches. The M5x0.8 port is standard for this bore. The thin Ø4mm rod is built for coaxial thrust, so over this long stroke an external guide is recommended to prevent side-load damage.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-50S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-50S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø10 mm |
| Rod diameter | Ø4 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 50 mm (75–125 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 PBJ10X125-50S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 10 | 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 PBJ10X125-50S Is Used
Changeover Fixtures
Dial in the exact retract end position during product changeovers without machining new hard stops.
Trial Stops
Set precise 75 to 125mm retractions for prototype testing and trial depths directly at the machine.
Variable Insertion
Alter the back position for different insertion depths on the fly, avoiding the need to reorder hardware.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-50S the Right Cylinder?
Selecting this cylinder requires sizing both ways: the smaller bore is unavailable in this pen series, while the next size up (12mm) provides 56.5N push at 0.5MPa if your jig needs more force. For the PBJ10X125-50S, plan for a safe working load of about 24N (roughly 60% of the 39.3N theoretical push) to account for seal friction. This equates to lifting about 2kg vertically with a 2:1 safety margin.
Remember that the fixed TPU bumper only decelerates the last few millimeters; at higher speeds with real tooling mass, meter-out the exhaust or add an external shock absorber. A plain cylinder does not hold position on air loss, so use an external stop for fail-safe load holding. Confirm your ordering essentials: bore 10, 125mm stroke, 50mm window, S magnet, and any LB or FA mount.
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 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 PBJ10X125-50S FAQ
The effective stroke range is 75 to 125mm. Force is unchanged from a standard PB 10mm bore: 39.3N push and 33N pull at 0.5MPa, and 55N push and 46.2N pull at the 0.7MPa maximum.
The rear M4x0.7 screw shortens only the retract end; the extend end remains fixed. Re-tighten the lock nut after setting to prevent vibration drift. The piston drifts on air loss, so an external rod lock is needed 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
Request a Quote for Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.