Airtac PB Pen-type Cylinder PB16X250U
The AirTAC Airtac PB Pen-type Cylinder PB16X250U is a double-acting pen-size (mini) air cylinder with a Ø16mm bore and 250mm stroke. Its slim round barrel and back cover are stainless steel, the M5×0.8 ports keep plumbing compact, and the fast, low-friction piston suits high-cycle small-part handling.
- BoreØ16 mm
- Stroke250 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM10×1.0
- CushionElastic bumper (both ends)
About the Airtac PB Pen-type Cylinder PB16X250U
The AirTAC PB16X250U is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency small-part motion. It generates 100.5 N of push and 90.7 N of pull at 0.5 MPa, utilizing a slim SUS304 stainless steel round barrel and piston rod to endure damp or mildly corrosive production lines. The U suffix indicates a 90-degree perpendicular side air inlet, allowing flat plumbing where axial port clearance is tight.
This model features a 16 mm bore, a 250 mm stroke, and an M5x0.8 port. Because it lacks the -S magnet code, it does not support magnetic position sensing. Travel speed reaches 50-800 mm/s, with a fixed TPU bumper at each end to absorb impact. Plan for a safe working load of roughly 60 N (about 60% of the 0.5 MPa theoretical force) to account for seal friction and smooth travel.
Airtac PB Pen-type Cylinder PB16X250U Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB16X250U |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| 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 300 mm |
Specifications follow the official AirTAC PB pen-size datasheet. Piston rod and barrel are stainless steel. Confirm bore, stroke and back-cover option 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 |
Values are taken from the AirTAC PB thrust table. Because pull acts on the rod-side annular area, pull force is always lower than push. Actual usable force is reduced by friction — size with a margin.
Model Code: Airtac PB Pen-type Cylinder PB16X250U
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| CB / U / R | Back cover: CB double clevis, U 90° side inlet, R axial inlet (bore-dependent). |
Mounting accessories: LB, FA, CJ. Related PB-family variants: PSB (single-acting push), PTB (single-acting pull), PBD (double rod), PBJ (adjustable stroke), PBR (front-mount).
Where the Airtac PB Pen-type Cylinder PB16X250U Is Used
Package Flap Folding
Pushes corrugated carton flaps closed on a packing line, where the 90-degree side inlet keeps plumbing flush against the conveyor frame.
Textile Yarn Guide
Cycles rapidly to shift a yarn guide across a weaving machine, benefiting from the SUS304 barrel in humid textile facilities.
Lab Sample Ejection
Extends 250 mm to push prepared specimen trays out of a chemical analyzer, lifting about 5.1 kg vertically with a 2:1 safety margin.
Is the Airtac PB Pen-type Cylinder PB16X250U the Right Cylinder?
When sizing this actuator, consider stepping down to the 12 mm bore if your task requires less force, which provides 56.5 N push at 0.5 MPa. If you need maximum thrust, this 16 mm bore is the largest in the PB family, delivering 140.7 N at the 0.7 MPa maximum operating pressure. The 5 mm rod carries an M10x1.0 end thread for load coupling; over this 250 mm stroke, add an external linear bearing to prevent side-load deflection.
Confirm your ordering essentials: 16 mm bore, 250 mm stroke, M5x0.8 port, no sensor magnet, and the U 90-degree side inlet. Note that a plain PB cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumpers only decelerate near stroke end rather than locking the load. For fail-safe holding, specify an external rod lock.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Slim pen body vs. a standard round cylinder
- ✓ Back cover: CB / U / R inlet direction
- ✓ Magnet (S) for sensors?
- ✓ Mounting: LB / FA / CJ or front thread
- ✓ 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 Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
- check Fit dust caps to ports during long-term storage.
- check Installation by qualified personnel per AirTAC docs.
Airtac PB Pen-type Cylinder PB16X250U FAQ
At 0.5 MPa, the push force is 100.5 N and the pull force is 90.7 N. At the maximum operating pressure of 0.7 MPa, the push is 140.7 N and the pull is 126.9 N. The operating pressure range is 0.15-0.7 MPa, with a proof pressure of 1.2 MPa and a speed range of 50-800 mm/s.
This actuator uses a fixed TPU bumper at each end rather than an adjustable air cushion. It only decelerates the piston over the last few millimeters of travel. At high speeds with heavy tooling mass, you should meter-out the exhaust or install an external shock absorber to prevent bottoming out.
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Related AirTAC PB Pen-Size Cylinders
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