Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20S 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 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 PBJ16X50-20S
The AirTAC PBJ16X50-20S is a double-acting, double-rod pen-size mini cylinder with a 20mm adjustable stroke window. A rear adjuster screw shortens the retract end, giving an effective stroke range of 30-50mm. The extend end remains fixed.
Built with a SUS304 stainless rod and barrel, this slim 16mm bore cylinder saves space in tight jigs. The M5x0.8 air port and M10x1.0 rod-end thread match standard accessories. A fixed TPU bumper decelerates the piston at both ends. The built-in magnet works with AirTAC reed or electronic switches.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20S |
|---|---|
| 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 PBJ16X50-20S
| 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 PBJ16X50-20S Is Used
Changeover Fixtures
Dial in the exact retract stop during product changeovers without swapping out the entire cylinder hardware.
Trial Stops
Set precise 30 to 50mm test positions for prototyping or probing before finalizing a fixed mechanical stop.
Variable Depth Insert
Adjust the penetration depth for pressing pins or plugs on the fly to suit different assembly heights.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X50-20S the Right Cylinder?
If your load requires less force, drop to the 12mm; if you need more, note that 16mm is the largest pen-size option. The 30-50mm effective stroke is set by shortening the retract end only. The extend end is fixed, so verify your layout accommodates this rear-only adjustment. After setting your length, re-tighten the lock nut on the M5x0.8 adjuster thread to prevent vibration drift. Confirm your ordering essentials: 16mm bore, 50mm nominal stroke, 20mm window, S magnet, and your preferred mount.
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 PBJ16X50-20S FAQ
The effective stroke range is 30-50mm. Adjusting the stroke does not alter these force figures.
A rear screw shortens the retract end only; the extend end is fixed. You must re-tighten the lock nut after setting to prevent vibration drift. A plain PB-type cylinder does not hold position on air loss, as the piston drifts without live pressure.
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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