Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-20S 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 70mm stroke with a 20mm fine-adjustable window — settable from 50 to 70mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke70 mm
- Adjust window20 mm
- Effective range50–70 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-20S
The AirTAC PBJ16X70-20S is a double-acting, single-rod pen-size mini cylinder with a 20mm adjustable window. A rear screw and lock nut shorten the retract end, giving an effective stroke range of 50-70mm. 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.
The Ø16mm bore uses an M5x0.8 port and a Ø5mm SUS304 stainless rod. A fixed TPU bumper cushions each end. The built-in magnet (-S) supports reed or electronic switches. For vertical lifts, plan to raise about 5.1kg safely, applying a 2:1 margin to the 0.5MPa rating.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 70 mm |
| Adjustable window | 20 mm (50–70 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 PBJ16X70-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×70 | 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 PBJ16X70-20S Is Used
Changeover Fixtures
Rapidly tune the 50-70mm retract length during product changeovers without machining new hard stops.
Trial Stops
Dial in the exact back position during prototype runs, then lock the M5x0.8 adjuster nut to secure the dimension.
Variable-Depth Insert
Adjust the retract distance on the fly to press components to varying depths on a single jig.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-20S the Right Cylinder?
For lighter jobs, the Ø12 bore offers 56.5N push at 0.5MPa; if you need more power, this Ø16 already provides 100.5N push at the same pressure. Remember that only the back position is tunable, so set your retract distance and re-tighten the lock nut to prevent vibration drift. Confirm your ordering code details: bore, stroke, window, magnet, and mount.
The Ø5mm rod handles coaxial thrust well, but over long strokes or off-axis loads, add an external guide or linear bearing. The fixed TPU bumper only decelerates the last few millimeters; at mid-to-high speeds with real tooling mass, meter-out the exhaust or fit an external shock absorber.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 50–70 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 PBJ16X70-20S FAQ
The effective stroke range is 50-70mm. 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 rear M5x0.8 screw shortens only the retract end; the extend end is fixed. Re-tighten the lock nut after setting to stop vibration drift. The -S suffix denotes a built-in piston magnet compatible with reed or electronic switches.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC PBJ Pen-Size Cylinders
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