Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-40
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-40 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 50mm stroke with a 40mm fine-adjustable window — settable from 10 to 50mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke50 mm
- Adjust window40 mm
- Effective range10–50 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-40
The AirTAC PBJ16X50-40 is a JIS pen-size double-acting mini cylinder featuring a 40mm adjustable window. A rear adjuster screw shortens the retract end, giving an effective stroke range of 10-50mm. The extend end remains fixed. Force is identical to a standard PB cylinder of this bore, delivering 100.5N push and 90.7N pull at 0.5 MPa. The slim SUS304 stainless body and fixed TPU bumper suit tight jigs and light end-of-arm tooling.
You can tune stroke length directly on the machine without changing hardware. The built-in adjuster thread is M5x0.8. Because the Ø5mm rod is built for coaxial thrust, add an external linear bearing if you encounter off-axis loads. The fixed TPU bumper only decelerates the last few millimeters of travel, so meter-out the exhaust or add an external shock absorber when cycling real tooling mass at higher speeds. This cylinder does not hold position on air loss; use an external stop for fail-safe holding.
The air port is M5x0.8 and the rod-end thread is M10x1.0. Operating pressure is 0.15-0.7 MPa. A plain PBJ does not include a sensor magnet. For a fixed length choose PB; for equal force both ways choose PBD; for a front bolt mount choose PBR. Re-tighten the lock nut after setting the screw to prevent vibration drift. Plan for a safe working load of about 60N, which is roughly 60% of the 0.5 MPa push figure, to account for seal friction and smooth travel. This also translates to lifting about 5.1kg vertically with a 2:1 margin.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-40 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-40 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 40 mm (10–50 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 PBJ16X50-40
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×50 | 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 PBJ16X50-40 Is Used
Changeover Fixtures
Quickly tune the 10-50mm retract length during product changeovers without swapping physical cylinder hardware.
Trial Insertion Stops
Dial in exact insertion depths on the machine during prototype runs before finalizing mechanical stop positions.
Variable Depth Pressing
Set precise pressing end-points for varied part heights using the rear adjuster screw and lock nut.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-40 the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5 MPa. If you need less force, dropping to a 12mm bore yields 56.5N push. If you need more force, you would step up to a larger profile. Remember that only the retract end is adjustable here; the extend end is fixed. Always re-tighten the lock nut after setting the M5x0.8 adjuster screw to prevent vibration drift. Confirm your ordering essentials: 16mm bore, 50mm nominal stroke, 40mm window, no magnet, and your preferred LB or FA mount.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 10–50 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 PBJ16X50-40 FAQ
The effective stroke range is 10-50mm. The force is 100.5N push and 90.7N pull at 0.5 MPa, and 140.7N push and 126.9N pull at the 0.7 MPa maximum.
A rear M5x0.8 adjuster screw shortens the retract end by up to 40mm, while the extend end remains fixed. You must re-tighten the lock nut after setting to prevent vibration drift.
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Related AirTAC PBJ Pen-Size Cylinders
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