Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S is a double-acting pen-size mini cylinder with a rear adjuster screw that shortens the retract end of the stroke. On a Ø16mm bore it gives a nominal 40mm stroke with a 40mm fine-adjustable window, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke40 mm
- Adjust window40 mm
- Effective range0–40 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S
The AirTAC PBJ16X40-40S is a double-acting, single-rod pen-size mini cylinder with a 40mm adjustable stroke window. A rear M5x0.8 adjuster screw shortens the retract end, giving an effective stroke range of 0-40mm. Output force remains identical to a standard PB body of this bore, delivering 100.5N push and 90.7N pull at 0.5MPa. The M5x0.8 air port and fixed TPU bumper are standard.
The built-in magnet works with reed or electronic switches for position sensing. Plan for a safe working load of about 60N (roughly 60% of the 0.5MPa push figure) to account for seal friction. This equates to lifting about 5.1kg vertically with a 2:1 safety margin. The Ø5mm rod is built for coaxial thrust, so add an external guide if handling off-axis loads over long strokes.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 40 mm (0–40 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 |
The adjuster shortens only the retract end; the extend end is fixed. Force is unchanged from the standard PB double-acting cylinder. Confirm the set position against the product label before installation.
Theoretical Output Force (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 100.5 N | 90.7 N |
| 0.7 MPa (max) | 140.7 N | 126.9 N |
Adjusting the stroke does not change output force — these are the same values as the standard PB double-acting cylinder of the same bore. Size with a friction margin.
Model Code: Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×40 | Nominal stroke length in mm. |
| -40 | 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 PBJ16X40-40S Is Used
Changeover Fixtures
Dial in the exact retract stop for different part heights during machine changeovers without swapping out the physical cylinder body.
Trial Stops
Set temporary end positions during prototype testing, letting engineers find the perfect stroke length before finalizing a design.
Variable Insertion
Adjust the depth of a pressing or insertion tool on the fly to accommodate material thickness variations on the assembly line.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X40-40S the Right Cylinder?
When sizing this 16mm bore, stepping down to a 12mm bore yields 56.5N push at 0.5MPa, while stepping up is not applicable here as 16mm is the largest PBJ bore. Select the PBJ16X40-40S if your mechanism needs precise retract positioning within the 0-40mm window. Remember that only the retract end is tunable; the extend position remains fixed. Always re-tighten the lock nut after dialing in the screw to prevent vibration drift. Confirm your ordering code includes the S magnet and your required LB or FA mount.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 0–40 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 The adjuster shortens the retract end only.
- 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 PBJ16X40-40S FAQ
The effective stroke range is 0-40mm. At 0.5MPa it provides 100.5N push and 90.7N pull. At the 0.7MPa maximum it provides 140.7N push and 126.9N pull.
The rear M5x0.8 screw shortens the retract end only; the extend end remains fixed. After setting your desired length, you must re-tighten the lock nut to prevent vibration drift.
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Related AirTAC PBJ Pen-Size Cylinders
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