Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-40S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-40S 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 45mm stroke with a 40mm fine-adjustable window — settable from 5 to 45mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke45 mm
- Adjust window40 mm
- Effective range5–45 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-40S
The AirTAC PBJ16X45-40S is a double-acting, single-rod pen-size mini cylinder with a 40mm adjustable window. A rear adjuster screw and lock nut shorten the retract end, giving an effective stroke range of 5-45mm. You tune the exact length on the machine without ordering new hardware. The extend end remains fixed.
Force is identical to a standard PB cylinder of the same bore, delivering 100.5N push and 90.7N pull at 0.5MPa. The slim SUS304 stainless body uses an M5x0.8 air port and a fixed TPU bumper at each end. Because the rod is only Ø5mm, use an external guide for any off-axis loads to prevent bending. The built-in magnet works with reed or electronic switches.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-40S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-40S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 45 mm |
| Adjustable window | 40 mm (5–45 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 PBJ16X45-40S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×45 | 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 PBJ16X45-40S Is Used
Variable-Depth Pressing
Dial in precise insertion depths for different parts on one fixture using the 5-45mm retract adjustment.
Changeover Fixtures
Quickly reposition the end-of-stroke stop during product changeovers without disassembling the jig.
Trial Stop Positioning
Fine-tune test probe contact points on the machine while keeping the extend stroke fixed.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X45-40S the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5MPa. If you need less force, the 12mm bore offers 56.5N push; for heavier tasks, note that 16mm is the largest pen-size option in this series. When sizing, plan for a safe working load of about 60N, which assumes 60% of the 0.5MPa theoretical force to account for seal friction.
Remember that only the retract position is adjustable. Set your distance, then firmly tighten the lock nut to prevent vibration drift. Confirm your ordering essentials: 16mm bore, 45mm nominal stroke, 40mm window, S magnet, and any LB or FA mount.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 5–45 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 PBJ16X45-40S FAQ
The effective stroke range is 5-45mm. Force equals a standard PB 16mm cylinder: 100.5N push and 90.7N pull at 0.5MPa, and 140.7N push and 126.9N pull at the 0.7MPa maximum. The air port is M5x0.8.
A rear M5x0.8 screw shortens the retract end while the extend end stays fixed. You must re-tighten the lock nut after setting to prevent vibration drift. The piston does not hold position on air loss; it drifts, so add an external rod lock for fail-safe holding.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC PBJ Pen-Size Cylinders
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