Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20 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 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 PBJ16X40-20
The AirTAC PBJ16X40-20 is a double-acting, double-rod pen-size mini cylinder with a 20mm adjustable window. A rear adjuster screw shortens the retract end, giving an effective stroke range of 20 to 40mm. The extend end remains fixed, so you can dial in the back position without ordering new hardware.
This 16mm bore model features a Ø5mm piston rod, an M5x0.8 air port, and a fixed TPU bumper at each end. The SUS304 stainless build fits tight jigs and light end-of-arm tooling.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20 Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20 |
|---|---|
| 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 PBJ16X40-20
| 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 PBJ16X40-20 Is Used
Variable-Depth Insertion
Dial in precise 20-40mm press strokes for inserting pins or plugs without swapping out the entire cylinder body.
Changeover Fixtures
Quickly adjust retract length on production lines handling multiple product sizes, saving setup time between runs.
Trial Positioning Stops
Fine-tune the back position during prototyping to find the exact end-of-stroke point before finalizing a fixed design.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-20 the Right Cylinder?
For sizing context, dropping to a 12mm bore lowers the 0.5MPa push force to 56.5N, while this 16mm bore gives 100.5N. If you need more thrust, consider a larger profile cylinder. Remember that only the retract position is tunable here; the extend end is fixed. After setting your 20-40mm range, re-tighten the lock nut on the M5x0.8 adjuster screw so vibration does not drift the length. Confirm your ordering essentials: 16mm bore, 40mm nominal stroke, 20mm window, and any mount accessories.
The thin Ø5mm rod is built for coaxial thrust. Over long strokes or with off-axis loads, add an external guide or linear bearing to prevent side-load damage. Also note that the fixed TPU bumper only decelerates the last few millimeters; at higher speeds with real tooling mass, meter-out the exhaust or fit an external shock absorber. This plain cylinder does not hold position on air loss, so use an external stop for fail-safe load holding.
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 PBJ16X40-20 FAQ
The effective stroke range is 20 to 40mm. At 0.5MPa, push force is 100.5N and pull is 90.7N. At the maximum 0.7MPa operating pressure, push is 140.7N and pull is 126.9N. Adjusting the stroke does not change these forces.
The screw shortens only the retract end of the stroke, while the extend end remains fixed. After setting your desired position within the 20mm window, you must re-tighten the lock nut to prevent vibration drift. This cylinder does not have a sensor magnet.
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 PBJ16X40-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.