Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-40S
The AirTAC Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-40S 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 70mm stroke with a 40mm fine-adjustable window — settable from 30 to 70mm, so you set the end position without changing hardware.
- BoreØ16 mm
- Nominal stroke70 mm
- Adjust window40 mm
- Effective range30–70 mm
- Port sizeM5×0.8
- Acting typeDouble acting
About the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-40S
The AirTAC PBJ16X70-40S is a double-acting, single-rod pen-size mini cylinder with a 40mm adjustable window. A rear adjuster screw shortens the retract end, giving an effective stroke range of 30-70mm. The extend end remains fixed. It delivers 100.5N push and 90.7N pull at 0.5MPa, matching standard PB forces exactly, so the adjuster carries no force penalty.
This bore uses an M5x0.8 port and a fixed TPU bumper at each end. The built-in magnet works with reed or electronic switches. For real work at 0.5MPa, plan for a safe working load of about 60N (roughly 60% of theoretical force). With a 2:1 margin, it lifts about 5.1kg vertically. The Ø5mm rod handles coaxial thrust; add an external guide for off-axis loads.
Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-40S Technical Specifications
| Model | Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-40S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 70 mm |
| Adjustable window | 40 mm (30–70 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 PBJ16X70-40S
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×70 | 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 PBJ16X70-40S Is Used
Changeover Fixtures
Dial in the retract from 70mm down to 30mm during product changeovers, avoiding the need to swap cylinders for different part heights.
Trial Stops
Use the rear screw to set precise end-of-stroke positions for prototype testing, locking the nut once the optimal travel is found.
Variable-Depth Insertion
Adjust the retract length on the machine to tune insertion depths without ordering new hardware, perfect for light-duty press tasks.
Is the Airtac PBJ Adjustable Pen-Type Cylinder PBJ16X70-40S the Right Cylinder?
This 16mm bore provides 100.5N push at 0.5MPa. If you need less force, the 12mm bore gives 56.5N; if you need more, consider a larger profile. Remember that only the retract position is adjustable—the extend end is fixed. After setting your 30-70mm range, re-tighten the lock nut on the M5x0.8 adjuster thread to prevent vibration drift.
Confirm your ordering essentials: bore 16, nominal stroke 70, adjustable window 40, magnet S, and any mounting brackets (LB or FA). The thin Ø5mm rod is built for inline thrust, not side load, so use a linear bearing if your jig imposes lateral forces.
Quick checklist
- ✓ Need to fine-tune the end position on site
- ✓ Retract end sits within 30–70 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 PBJ16X70-40S FAQ
The effective stroke range is 30-70mm (nominal 70mm minus up to 40mm). Forces are 100.5N push and 90.7N pull at 0.5MPa, and 140.7N push and 126.9N pull at the 0.7MPa maximum.
A rear screw shortens only the retract end; the extend end is fixed. Re-tighten the lock nut after setting to prevent vibration drift. The -S magnet works with reed or electronic switches for position sensing.
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Related AirTAC PBJ Pen-Size Cylinders
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