Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X75-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X75-20S 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 75mm stroke with a 20mm fine-adjustable window — settable from 55 to 75mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke75 mm
- Adjust window20 mm
- Effective range55–75 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X75-20S
The AirTAC PBJ16X75-20S is a double-acting, single-rod pen-size mini cylinder with a 20mm adjustable stroke window. A rear adjuster screw and lock nut shorten the retract end, giving an effective stroke range of 55-75mm. The extend end remains fixed. Output force equals a standard PB body of the same bore, delivering 100.5N push and 90.7N pull at 0.5MPa with no force penalty for the adjuster.
The slim stainless body features a built-in piston magnet for reed or electronic switches. It uses an M5x0.8 air port, an M10x1.0 rod-end thread, and an M5x0.8 adjuster thread. A fixed TPU bumper decelerates the last few millimeters of travel. Plan for a safe working load of about 60N (roughly 60% of the 0.5MPa push force), which can vertically lift about 5.1kg with a 2:1 margin.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X75-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X75-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 75 mm |
| Adjustable window | 20 mm (55–75 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 PBJ16X75-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×75 | 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 PBJ16X75-20S Is Used
Changeover Fixtures
Dial in the exact 55-75mm retract position during product changeovers without machining new spacer blocks or reordering cylinders.
Trial Stops
Fine-tune the back position for prototype testing and trial stops, locking the M5x0.8 adjuster nut once the optimal length is found.
Variable-Depth Insertion
Set precise retract depths for variable-depth insertion jigs, using the 16mm bore's 100.5N push at 0.5MPa to drive light tooling.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X75-20S the Right Cylinder?
For lighter tasks, a 12mm bore PB cylinder provides 56.5N push at 0.5MPa, while stepping up is not needed here as the 16mm bore offers 140.7N push at the 0.7MPa maximum. When sizing this PBJ16X75-20S, remember that only the retract position is tunable; the extend end is fixed. Always re-tighten the lock nut after setting the 55-75mm range to prevent vibration drift. Confirm your ordering essentials: 16mm bore, 75mm nominal stroke, 20mm window, S magnet, and mounting hardware.
The thin Ø5mm rod is built for coaxial thrust. Over this 75mm stroke or with off-axis loads, add an external guide or linear bearing to prevent side-load wear. At higher speeds with real tooling mass, the fixed TPU bumper can bottom out, so meter-out the exhaust or add an external shock absorber.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 55–75 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 PBJ16X75-20S FAQ
The effective stroke range is 55-75mm (75mm nominal minus a 20mm window). Force equals a standard PB 16mm cylinder: 100.5N push and 90.7N pull at 0.5MPa, or 140.7N push and 126.9N pull at the 0.7MPa maximum.
A rear screw shortens the retract end only; the extend end is fixed. You set the length on the machine and re-tighten the lock nut to prevent vibration drift. The built-in S magnet works with reed or electronic switches.
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Related AirTAC PBJ Pen-Size Cylinders
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