Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20S 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 40mm stroke with a 20mm fine-adjustable window — settable from 20 to 40mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke40 mm
- Adjust window20 mm
- Effective range20–40 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 PBJ16X40-20S
The AirTAC PBJ16X40-20S is a JIS pen-size double-acting mini cylinder with a 20mm adjustable window, letting you set the effective stroke from 20 to 40mm directly on the machine. A rear M5x0.8 adjuster screw shortens the retract end, while the extend position remains fixed. The SUS304 stainless barrel and slim body save space in tight jigs.
The built-in piston magnet works with reed or electronic switches. A fixed TPU bumper decelerates the last few mm of travel. For real work, plan a safe load around 60N (about 60% of the 0.5MPa figure).
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 20 mm (20–40 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 PBJ16X40-20S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×40 | 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 PBJ16X40-20S Is Used
Changeover Fixtures
Quickly tune the 20 to 40mm retract end during product changeovers without swapping hardware or reordering cylinders for new lengths.
Trial Stops
Dial in the exact back position for prototype testing and light press fits, locking the nut once the optimal stroke is found.
Variable Depth Insertion
Set precise insertion depths on the fly.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20S the Right Cylinder?
Remember only the retract end is adjustable here, so verify your extend layout. After setting the 20-40mm range, re-tighten the lock nut to prevent vibration drift.
Confirm your ordering essentials: 16mm bore, 40mm nominal stroke, 20mm window, S magnet, and any LB or FA mount. The M5x0.8 port handles air delivery. The Ø5mm rod handles coaxial thrust, so add a linear bearing for off-axis loads.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 20–40 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 PBJ16X40-20S FAQ
The effective stroke range is 20-40mm. Force is identical to a standard PB cylinder of the same bore.
A rear M5x0.8 screw shortens the retract end up to 20mm, while the extend end is fixed. You must re-tighten the lock nut after setting to prevent vibration drift. The S suffix means a 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
Request a Quote for Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.