Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 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 50mm stroke with a 20mm fine-adjustable window — settable from 30 to 50mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke50 mm
- Adjust window20 mm
- Effective range30–50 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 PBJ16X50-20
The AirTAC PBJ16X50-20 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 30 to 50mm. You set the exact length on the machine during commissioning without swapping hardware. The extend end remains fixed.
The SUS304 stainless barrel and Ø5mm rod provide a slim profile, while a fixed TPU bumper cushions each end. The thin rod handles coaxial thrust only, so add an external guide for any off-axis loads.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 20 mm (30–50 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 PBJ16X50-20
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×50 | 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 PBJ16X50-20 Is Used
Changeover Fixtures
Dial in the exact retract stop during product changeovers to set new datum points without machining replacement pins.
Trial Insertion Stops
Nudge parts to varying depths on a test press and lock the M5x0.8 nut once the perfect insertion position is found.
Variable Depth Pressing
Adjust the back position for different material thicknesses on a single assembly station while the extend end stays fixed.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20 the Right Cylinder?
Remember that only the back position is tunable. After setting your 30-50mm range, re-tighten the lock nut because vibration can drift an unlocked screw.
Confirm your ordering essentials: 16mm bore, 50mm nominal stroke, 20mm window, and your mount. This unit has no magnet. The air port is M5x0.8.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 30–50 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 PBJ16X50-20 FAQ
The effective stroke range is 30 to 50mm.
The rear screw shortens only the retract end; the extend stroke is fixed. You must re-tighten the lock nut after setting to prevent drift. A plain cylinder does not hold position on air loss, so add an external rod lock for a fail-safe hold.
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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