Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S is a double-acting, double-rod pen-size mini cylinder whose rear rod carries a stroke adjuster. On a Ø16mm bore it gives a nominal 45mm stroke with a 20mm fine-adjustable window — settable from 25 to 45mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke45 mm
- Adjust window20 mm
- Effective range25–45 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S
The AirTAC PBJ16X45-20S is a double-acting, double-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 25-45mm. The extend end remains fixed. The bore is 16mm, the piston rod is Ø5mm, and the air port is M5x0.8.
The slim SUS304 stainless body saves space in tight jigs. A fixed TPU bumper decelerates the piston at both ends. This -S variant includes a built-in piston magnet for reed or electronic switches.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 45 mm |
| Adjustable window | 20 mm (25–45 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 |
PBJ is a double-rod cylinder: the rear rod carries the stroke adjuster, which sets the stroke end within the adjustable window. Confirm the set position against the product label before installation.
Theoretical Output Force (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 90.7 N | 90.7 N |
| 0.7 MPa (max) | 126.9 N | 126.9 N |
The rear rod passes through the rear cover, so both piston faces lose rod area: push is shown at the annular-area value (conservative), lower than a single-rod PB push of the same bore. Size with a friction margin.
Model Code: Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×45 | 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 PBJ16X45-20S Is Used
Variable-Depth Insertion
Dial in precise pressing depth during trial runs. The 25-45mm retract window allows quick changes without swapping cylinders.
Quick Changeover Fixtures
Adapt clamping positions on the fly for different part sizes. The rear adjuster brings the tooling back to the exact required retracted position.
Light Vertical Lifts
The Ø5mm rod handles coaxial thrust for light end-of-arm tooling.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-20S the Right Cylinder?
Remember that only the retract position is field-settable; the extend end is fixed. Always re-tighten the lock nut after setting the rear screw to prevent vibration drift. Confirm your ordering essentials: 16mm bore, 45mm nominal stroke, 20mm window, built-in magnet, and mounting style.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 25–45 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 Double rod: the rear rod carries the stroke adjuster.
- 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 PBJ16X45-20S FAQ
The effective stroke range is 25-45mm. At 0.5MPa, push force is 100.5N and pull is 90.7N. At the maximum 0.7MPa operating pressure, push is 140.7N and pull is 126.9N. Adjusting the stroke does not alter these forces.
A rear M5x0.8 screw shortens only the retract end; the extend end is fixed. You must re-tighten the lock nut after setting to stop vibration drift. The -S suffix means a built-in piston magnet is present, compatible with AirTAC reed or electronic switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PBJ Pen-Size Cylinders
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