Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 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 20mm fine-adjustable window — settable from 30 to 50mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke50 mm
- Adjust window20 mm
- Effective range30–50 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20
The AirTAC PBJ16X50-20 is a double-acting, single-rod pen-size mini cylinder with a 20mm adjustable window. A rear M5x0.8 adjuster screw shortens the retract end, giving an effective stroke range of 30 to 50mm. You set the exact length on the machine during commissioning without swapping hardware. The extend end remains fixed.
Output force matches the standard PB 16mm bore, delivering 100.5N push at 0.5MPa. The SUS304 stainless barrel and Ø5mm rod provide a slim profile, while a fixed TPU bumper cushions each end. For real work at 0.5MPa, plan for a safe working load of about 60N. The thin rod handles coaxial thrust only, so add an external guide for any off-axis loads.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 20 mm (30–50 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 PBJ16X50-20
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×50 | Nominal stroke length in mm. |
| -20 | 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 PBJ16X50-20 Is Used
Changeover Fixtures
Dial in the exact retract stop during product changeovers to set new datum points without machining replacement pins.
Trial Insertion Stops
Nudge parts to varying depths on a test press and lock the M5x0.8 nut once the perfect insertion position is found.
Variable Depth Pressing
Adjust the back position for different material thicknesses on a single assembly station while the extend end stays fixed.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5MPa. If you need less force, the 12mm bore offers 56.5N push; if your jig requires more, note that this is the largest PBJ size available. Remember that only the back position is tunable. After setting your 30-50mm range, re-tighten the lock nut because vibration can drift an unlocked screw.
Confirm your ordering essentials: 16mm bore, 50mm nominal stroke, 20mm window, and your mount. This unit has no magnet. The air port is M5x0.8.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 30–50 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 PBJ16X50-20 FAQ
The effective stroke range is 30 to 50mm. At 0.5MPa it provides 100.5N push and 90.7N pull. At the maximum 0.7MPa operating pressure, it yields 140.7N push and 126.9N pull.
The rear screw shortens only the retract end; the extend stroke is fixed. You must re-tighten the lock nut after setting to prevent drift. A plain cylinder does not hold position on air loss, so add an external rod lock for a fail-safe hold.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC PBJ Pen-Size Cylinders
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