Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X55-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X55-20S 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 55mm stroke with a 20mm fine-adjustable window — settable from 35 to 55mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke55 mm
- Adjust window20 mm
- Effective range35–55 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 PBJ16X55-20S
The AirTAC PBJ16X55-20S is a double-acting, double-rod pen-size mini cylinder with a 20mm adjustable window. A rear M5x0.8 adjuster screw and lock nut shorten the retract end, giving an effective stroke range of 35-55mm. You tune the exact length on the machine without buying new hardware. The extend end remains fixed.
The SUS304 stainless barrel and slim 16mm body fit tight jigs. It includes a built-in magnet for reed or electronic switches and a fixed TPU bumper at each end.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X55-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X55-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 55 mm |
| Adjustable window | 20 mm (35–55 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 PBJ16X55-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×55 | 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 PBJ16X55-20S Is Used
Changeover Fixtures
Switch product families in seconds by dialing the retract stroke from 35 to 55mm, avoiding the need to swap physical stop hardware.
Variable-Depth Insertion
Press fittings to precise depths on the fly, using the rear adjuster to tune the retract end for each unique part assembly.
Trial Positioning Stops
Validate sensor and tooling locations during machine commissioning by testing different effective lengths before locking the nut.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X55-20S the Right Cylinder?
Stepping down to a 12mm bore drops push to 56.5N, while moving up to a larger standard body increases bulk. The thin Ø5mm piston rod is built for coaxial thrust; over long strokes or off-axis loads, add an external guide or linear bearing to prevent side-load wear.
Remember that only the retract position is adjustable. Set the rear screw to your required length and re-tighten the lock nut, as vibration can drift an unlocked screw. Confirm your ordering essentials: 16mm bore, 55mm nominal stroke, 20mm window, built-in S magnet, and any LB or FA mounts.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 35–55 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 PBJ16X55-20S FAQ
The effective stroke range is 35-55mm. Adjusting the stroke does not alter these forces.
A rear M5x0.8 screw shortens the retract end by up to 20mm, while the extend end stays fixed. You must re-tighten the lock nut after setting your desired length to prevent vibration drift. The built-in magnet works with 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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