Airtac PB Pen-type Cylinder PB12X85U
The AirTAC Airtac PB Pen-type Cylinder PB12X85U is a double-acting pen-size (mini) air cylinder with a Ø12mm bore and 85mm 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.
- BoreØ12 mm
- Stroke85 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM10×1.0
- CushionElastic bumper (both ends)
About the Airtac PB Pen-type Cylinder PB12X85U
The AirTAC PB12X85U is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency motion. It generates 56.5 N of push and 46.7 N of pull at 0.5 MPa, driven through an M5x0.8 port. The slim SUS304 stainless barrel and screwed-in covers provide excellent durability in damp or mildly corrosive work areas while saving critical space on tight jigs.
This 12 mm bore variant uses a fixed TPU bumper at each end to decelerate the stroke, and its U option provides a 90-degree side air inlet for flat plumbing along a machine frame. Because the rod is a slender Ø5 mm threaded M10x1.0, it is built for coaxial thrust rather than side loading. Plan for a safe working load of roughly 34 N at 0.5 MPa, accounting for seal friction and smooth travel.
Airtac PB Pen-type Cylinder PB12X85U Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB12X85U |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 85 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 56.5 N | 46.7 N |
| 0.7 MPa (max) | 79.1 N | 65.4 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 PB12X85U
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×85 | 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 PB12X85U Is Used
PCB Depaneling Jig
Actuates a routing blade fixture to singulate printed circuit boards, utilizing the 90-degree side inlet to keep pneumatic lines flush against the tight machine frame.
Blister Pack Sealing
Closes a small heat sealing head with 56.5 N of thrust at 0.5 MPa, cycling rapidly to form consumer blister packs while resisting humid factory conditions via its stainless build.
Micro-Component Sorting
Pushes tiny electronic chips into designated tubes on a test handler, where the 85 mm stroke and slim pen-size body prevent interference with dense neighboring tooling.
Is the Airtac PB Pen-type Cylinder PB12X85U the Right Cylinder?
When sizing this actuator, stepping down to the Ø10 bore yields 39.3 N of push at 0.5 MPa, while stepping up to the Ø16 bore provides 100.5 N, letting you match the exact force margin for your jig. To order, confirm the 12 mm bore, 85 mm stroke, M5x0.8 porting, and the U 90-degree side inlet. Note that a plain double-acting cylinder drifts when air is lost or the valve is centered; the fixed bumper only decelerates near stroke end, so add an external rod lock if your process requires fail-safe load holding.
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 PB12X85U FAQ
At 0.5 MPa, this 12 mm bore double-acting cylinder provides 56.5 N of push and 46.7 N of pull. At the maximum operating pressure of 0.7 MPa, it yields 79.1 N push and 65.4 N pull. It operates between 0.15-0.7 MPa at speeds of 50-800 mm/s.
The U code specifies a 90-degree perpendicular side air inlet for flat plumbing. For deceleration, it relies on a fixed TPU bumper at each end that absorbs impact over the last few millimeters. It is not field-adjustable, so at high speeds with heavy tooling mass you should meter-out the exhaust or install an external shock absorber.
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Related AirTAC PB Pen-Size Cylinders
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