Airtac PB Pen-type Cylinder PB16X125R
The AirTAC Airtac PB Pen-type Cylinder PB16X125R is a double-acting pen-size (mini) air cylinder with a Ø16mm bore and 125mm 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
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM10×1.0
- CushionElastic bumper (both ends)
About the Airtac PB Pen-type Cylinder PB16X125R
The AirTAC PB16X125R is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency small-part motion. It features a slim SUS304 stainless steel round barrel and piston rod, offering excellent durability in damp or mildly corrosive environments while saving valuable space and payload on light end-of-arm tooling. Delivering 100.5 N of push force at 0.5 MPa, it is designed for fast cycling at speeds up to 800 mm/s.
This specific configuration includes a 125 mm stroke and an R axial air inlet for straightforward in-line plumbing via the M5x0.8 port. The cylinder relies on a fixed TPU bumper at each end to decelerate the piston over the final few millimeters of travel. Because the rod is a slender Ø5 mm, you should maintain coaxial thrust and avoid side loading, adding an external linear bearing if guiding heavy tooling over this longer stroke.
Airtac PB Pen-type Cylinder PB16X125R Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB16X125R |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 125 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 PB16X125R
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×125 | 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 PB16X125R Is Used
PCB Depaneling Router
Actuates a tooling pin to secure circuit boards during routing, utilizing the 100.5 N push force to clamp components firmly without damaging the substrate.
Carton Flap Folder
Folds minor flaps on small pharmaceutical cartons on a high-speed line, where the compact SUS304 body resists washdown environments and fits within tight machine guarding.
Parts Divert Gate
Extends a 125 mm routing gate to sort lightweight plastic caps on a conveyor, benefiting from the fixed TPU bumper to absorb the impact at the end of the stroke.
Is the Airtac PB Pen-type Cylinder PB16X125R the Right Cylinder?
Choosing this 16 mm bore yields 100.5 N push and 90.7 N pull at 0.5 MPa. If you need slightly less force, the next size down is the 12 mm bore, which provides 56.5 N of push at 0.5 MPa. Since 16 mm is the largest bore in this family, stepping up to a larger profile body is required for heavier loads. For practical sizing, plan for a safe working load of about 60 N (roughly 60% of the 0.5 MPa theoretical push) to account for seal friction, or calculate a vertical lift capacity of about 5.1 kg with a sane 2:1 safety margin.
When ordering, confirm the 16 mm bore, 125 mm stroke, M5x0.8 port, and the R axial inlet. Note that a plain PB body does not hold its position if air pressure is lost or the valve is centered; the piston will drift, and the bumper only decelerates near the stroke end rather than locking the load. For fail-safe holding, an external stop or rod lock is required. This model is supplied without a sensor magnet.
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 PB16X125R FAQ
The PB16X125R operates at 0.15-0.7 MPa with a maximum proof pressure of 1.2 MPa. The theoretical force is 100.5 N push and 90.7 N pull at 0.5 MPa, reaching a maximum of 140.7 N push and 126.9 N pull at 0.7 MPa. The piston speed ranges from 50-800 mm/s.
No, a plain PB cylinder will drift if air is lost or the valve is centered. The fixed TPU bumper only decelerates the piston near the end of the stroke and does not act as a brake. You must install an external rod lock or mechanical stop to hold a load safely without live pressure.
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