Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20 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 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 PBJ16X65-20
The AirTAC PBJ16X65-20 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 45-65mm. The extend end remains fixed. Output force equals a standard PB body of the same bore, delivering 100.5N push at 0.5 MPa with zero penalty for adding adjustability.
The slim SUS304 stainless body saves space in tight jigs. A fixed TPU bumper cushions the last few millimeters of travel. For real tooling mass at higher speeds, meter-out the exhaust or add an external shock absorber, as the bumper can bottom out. The M5x0.8 air port matches the 16mm bore standard.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20 |
|---|---|
| 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 PBJ16X65-20
| 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 PBJ16X65-20 Is Used
Changeover Fixtures
Dial in the exact retract position between product runs using the rear screw, avoiding the need to swap physical spacer hardware on the fixture plate.
Trial Insertion Stops
Set precise insertion depths during prototype runs. Fine-tune the 45-65mm range on the machine to find the optimal seating position before locking the nut.
Variable Depth Pressing
Adjust the retract end to press components to varying depths without reordering cylinders, relying on the fixed 100.5N thrust at 0.5 MPa.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X65-20 the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5 MPa. Stepping down to a 12mm bore drops push to 56.5N, while no larger bore exists in the PBJ series. Plan for a safe working load of about 60N (roughly 60% of the 0.5 MPa figure) to account for seal friction. This equates to lifting about 5.1kg vertically with a sane 2:1 margin.
Remember the rear screw only tunes the retract end; the extend position is fixed. Always re-tighten the lock nut after setting your 45-65mm range to prevent vibration drift. The Ø5mm rod handles coaxial thrust well, but over long strokes or off-axis loads, add an external linear bearing. Confirm your ordering essentials: bore, stroke, window, and mount.
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 PBJ16X65-20 FAQ
The effective stroke range is 45-65mm. Force is identical to a standard PB 16mm bore: push 100.5N and pull 90.7N at 0.5 MPa; push 140.7N and pull 126.9N at the 0.7 MPa maximum. Adjusting the stroke does not alter these figures.
A rear M5x0.8 screw shortens the retract end of the stroke up to 20mm, while the extend end remains fixed. You must re-tighten the lock nut after setting your desired length to prevent vibration drift. This cylinder has no sensor magnet.
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Related AirTAC PBJ Pen-Size Cylinders
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