Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75 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 PBJ10X125-75
The AirTAC PBJ10X125-75 is a double-acting, single-rod pen-size mini cylinder featuring a 75mm adjustable stroke window. A rear adjuster screw (M4x0.7) with a lock nut shortens the retract end, giving an effective stroke range of 50 to 125mm. The extend end remains fixed. Because this 125mm length exceeds the 100mm max standard for the 10mm bore, this unit is non-standard and made-to-order.
Output force matches the standard PB series exactly, free of any penalty from the adjuster: 39.3N push and 33N pull at 0.5MPa. The slim SUS304 stainless body has an M5x0.8 port and a fixed TPU bumper at each end. The Ø4mm rod is built for coaxial thrust; over this long 125mm stroke, add an external guide or linear bearing to prevent side-load wear.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75 |
|---|---|
| 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 PBJ10X125-75
| 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 PBJ10X125-75 Is Used
Changeover Fixtures
Dial in the retract end from 50 to 125mm during product changeovers without machining new stops or swapping cylinders on the jig.
Trial Stops
Set precise probe contact depths on the fly. The rear M4x0.7 screw lets you tune the back position while the extend stroke stays fixed.
Variable-Depth Insert
Adjust insertion depth for different part heights. The fixed TPU bumper decelerates the last few mm, but add external shock absorption at high speeds.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ10X125-75 the Right Cylinder?
To size correctly, plan for a safe working load of about 24N at 0.5MPa (roughly 60% of the 39.3N theoretical push to account for seal friction). For vertical lifts, expect to raise about 2kg with a sane 2:1 safety margin. If you need more force, stepping up to the 12mm bore yields 56.5N push; if your load is lighter, dropping to a smaller pen body is advised.
Remember that only the back position is field-settable while the extend end is fixed. Re-tighten the lock nut after setting to prevent vibration drift. Confirm your ordering essentials: 10mm bore, 125mm nominal stroke, 75mm window, no magnet, and your required mounting. Note that a plain PBJ does not hold position on air loss; the piston drifts, so use an external stop for fail-safe load holding.
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 PBJ10X125-75 FAQ
The effective stroke range is 50 to 125mm (125mm nominal minus the 75mm window). Force is identical to a standard PB 10mm bore: 39.3N push and 33N pull at 0.5MPa, or 55N push and 46.2N pull at the 0.7MPa maximum. The air port is M5x0.8.
The rear screw shortens only the retract end; the extend end is fixed. You must re-tighten the lock nut after setting to stop vibration drift. A plain PBJ does not hold its load on air loss—the piston drifts—so an external rod lock is needed for fail-safe holding.
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