Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-50S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-50S 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 50mm fine-adjustable window, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke50 mm
- Adjust window50 mm
- Effective range0–50 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-50S
The AirTAC PBJ16X50-50S is a double-acting, single-rod pen-size mini cylinder with a 50mm adjustable-stroke window. A rear M5x0.8 adjuster screw and lock nut shorten the retract end, giving an effective stroke range of 0-50mm. The extend end remains fixed. Output force matches a standard PB body, delivering 100.5N push and 90.7N pull at 0.5 MPa. The bore is 16mm, the air port is M5x0.8, and the rod-end thread is M10x1.0.
This stainless steel build includes a built-in piston magnet for position sensing with reed or electronic switches. A fixed TPU bumper cushions each end. For real-world sizing, plan for a safe working load of about 60N (roughly 60% of the 0.5 MPa push figure) to account for seal friction. This equates to lifting about 5.1kg vertically with a sane 2:1 margin.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-50S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-50S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 50 mm (0–50 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 PBJ16X50-50S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×50 | 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 PBJ16X50-50S Is Used
Variable-Depth Insertion
Dial in precise press depths for different connectors on one jig by adjusting the retract end from 0 to 50mm without swapping cylinders.
Quick Changeover Fixtures
Speed up product changeovers by setting the exact retract distance on the machine, using the M5x0.8 rear screw and lock nut to lock the new stroke.
Trial Stop Positioning
Set temporary hard stops during prototype runs. The 16mm bore provides 100.5N push at 0.5 MPa to hold the trial part securely.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-50S the Right Cylinder?
Selecting this 16mm bore provides 100.5N push at 0.5 MPa. Stepping down to a 12mm bore drops push to 56.5N, while moving up is unnecessary for light tooling. Remember that only the retract position is field-settable; the extend end is fixed. After dialing in your 0-50mm range, re-tighten the lock nut so vibration does not drift the screw. Confirm your ordering essentials: bore, stroke, window, magnet S, and mount.
The Ø5mm piston rod is built for coaxial thrust. Over long strokes or with off-axis loads, add an external guide or linear bearing to prevent side load. The fixed TPU bumper only decelerates the last few millimeters; above mid-speed with heavy tooling, meter-out the exhaust or fit an external shock absorber. A plain cylinder does not hold position on air loss, 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 0–50 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 PBJ16X50-50S FAQ
The effective stroke range is 0-50mm. At 0.5 MPa it provides 100.5N push and 90.7N pull. At the maximum 0.7 MPa operating pressure, it provides 140.7N push and 126.9N pull. Adjusting the stroke does not change these forces.
The rear M5x0.8 screw shortens only the retract end; the extend end is fixed. You must re-tighten the lock nut after setting your range to prevent vibration drift. The S suffix means it has a built-in piston magnet compatible with reed or electronic switches.
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Related AirTAC PBJ Pen-Size Cylinders
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