Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20S 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 65mm stroke with a 20mm fine-adjustable window — settable from 45 to 65mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke65 mm
- Adjust window20 mm
- Effective range45–65 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20S
The AirTAC PBJ16X65-20S is a JIS pen-size double-acting mini cylinder with a 20mm adjustable window, yielding an effective stroke range of 45 to 65mm. A rear M5x0.8 adjuster screw shortens the retract end, allowing on-machine tuning without buying new hardware. The extend end remains fixed, so plan your layout accordingly. It features a built-in piston magnet for position sensing.
Output force matches the standard PB 16mm bore, delivering 100.5N push and 90.7N pull at 0.5MPa, completely free of any adjustment penalty. The slim SUS304 stainless body includes a fixed TPU bumper at each end. For practical sizing, plan for a safe working load of about 60N (roughly 60% of the 0.5MPa push figure), which can lift a 5.1kg mass vertically with a 2:1 safety margin.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 65 mm |
| Adjustable window | 20 mm (45–65 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 PBJ16X65-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×65 | 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 PBJ16X65-20S Is Used
Changeover Fixtures
Dial in the exact retract stop during product changeovers, switching the effective stroke from 65mm down to 45mm without swapping cylinders.
Trial Insertion Stops
Fine-tune insertion depths on test jigs by adjusting the rear screw, finding the optimal position before locking the nut for production runs.
Variable Depth Pressing
Set precise pressing endpoints on light-duty assembly tooling, using the 100.5N thrust at 0.5MPa to seat components perfectly.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20S the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5MPa. If you need less force, the 12mm bore offers 56.5N; if your payload is heavier, the next size up is unavailable in this pen series, so consider external guidance. The Ø5mm rod is built for coaxial thrust, so over the 65mm stroke add a linear bearing to prevent side-load deflection. Remember the fixed TPU bumper only decelerates the final few millimeters, so meter-out the exhaust when cycling real tooling mass at high speeds.
The adjuster only affects the retract position. Once you set your desired length within the 45-65mm window, re-tighten the lock nut to prevent vibration drift. To order, confirm bore, stroke, window, the S magnet option, and your LB or FA mounting choice.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 45–65 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 PBJ16X65-20S FAQ
At 0.5MPa it provides 100.5N push and 90.7N pull. At the 0.7MPa maximum, it yields 140.7N push and 126.9N pull. The nominal 65mm stroke is adjustable down to 45mm via the 20mm rear window. The air port is M5x0.8 and the rod-end thread is M10x1.0.
The rear M5x0.8 screw shortens only the retract end; the extend end remains fixed. You must re-tighten the lock nut after setting to prevent vibration drift. The S option includes a built-in piston magnet that works with AirTAC reed or electronic solid-state switches for position detection.
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Related AirTAC PBJ Pen-Size Cylinders
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