The AirTAC Airtac PBJ Adjustable Pen-Size Cylinders PBJ16X100-20S 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 100mm stroke with a 20mm fine-adjustable window — settable from 80 to 100mm, so you set the end position without changing hardware.
The PBJ16X100-20S is a double-acting, double-rod pen-size mini cylinder with a 20 mm adjustable-stroke window. A rear adjuster screw with lock nut shortens the retract end, so the effective stroke is set anywhere from 80 to 100 mm on the machine. The extend end is fixed.
Build is SUS304 stainless rod and barrel in a slim body that saves space in tight jigs and light end-of-arm tooling. A fixed TPU bumper at each end decelerates the last few mm of travel. The 5 mm rod is meant for coaxial thrust - over the full 100 mm stroke or with off-axis loads, add an external guide or linear bearing. Air supply is M5x0.8, filtered to 40 um, 0.15-0.7 MPa.
| Model | Airtac PBJ Adjustable Pen-Size Cylinders PBJ16X100-20S |
|---|---|
| Series | PBJ JIS pen-size adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Nominal stroke | 100 mm |
| Adjustable window | 20 mm (80–100 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.
| 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.
| PBJ | JIS pen-size adjustable-stroke mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×100 | 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).
One clamp body serves multiple part families: screw the retract stop in for short parts, back it off for tall ones, and lock the nut. The 80-100 mm window covers the lot without swapping cylinders.
Set the retract position so the ram bottoms at the exact insertion depth for each variant.
During commissioning, dial the retract end in until the part seats right, then lock it. The built-in magnet with -S lets a reed or electronic switch flag the reached position at each setting.
Bore 16 is the largest in the PBJ range, so if 100.5 N at 0.5 MPa is marginal with no larger bore available, check the load or add pressure headroom. Plan the real working load at roughly 60 N (about 60% of the rated 100.5 N) to keep motion smooth.
Remember the adjustment is retract-end only - the extend position never moves, so design your fixture layout around the fixed forward face. After setting the screw, re-tighten the lock nut; vibration can drift an unlocked adjuster. Order by bore 16, nominal stroke 100, window 20, magnet S, and mount (blank, LB, or FA).
Quick checklist
The adjustable window is 20 mm, so the effective stroke runs from 80 mm up to the full 100 mm. Adjusting the stroke does not change force - these are the same figures as a standard 16 mm bore PB.
A rear screw with M5x0.8 thread limits how far the piston retracts, shortening the stroke from the back end only - the extend end is fixed. Set it, then re-tighten the lock nut so vibration cannot drift it. Note that a plain PBJ does not hold position on air loss: the piston drifts, and the fixed TPU bumper only decelerates near stroke end. Use an external stop or rod lock for a fail-safe hold.
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