Airtac PB Pen-type Cylinder PB6X20RLB
The AirTAC Airtac PB Pen-type Cylinder PB6X20RLB is a double-acting pen-size (mini) air cylinder with a Ø6mm bore and 20mm 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.
- BoreØ6 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM5×0.8
- CushionElastic bumper (both ends)
About the Airtac PB Pen-type Cylinder PB6X20RLB
The AirTAC PB6X20RLB is a JIS pen-size double-acting single-rod mini cylinder engineered for compact, high-frequency motion. It generates a 14.2 N push and 10.6 N pull at 0.5 MPa, utilizing an M5x0.8 port and a 3 mm piston rod. The slim SUS304 stainless barrel and screwed-in covers provide excellent durability in damp or mildly corrosive workspaces while saving valuable space on end-of-arm tooling.
This specific configuration features an R axial air inlet for in-line plumbing and includes an LB mounting bracket for secure attachment. It relies on a fixed TPU bumper at each end to decelerate the stroke over the final few millimeters. Because the rod is only 3 mm thick, you must maintain coaxial thrust and avoid side loading to prevent bending, especially over longer extensions.
Airtac PB Pen-type Cylinder PB6X20RLB Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB6X20RLB |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø6 mm |
| Rod diameter | Ø3 mm |
| Stroke | 20 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 60 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 (Ø6mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 14.2 N | 10.6 N |
| 0.7 MPa (max) | 19.8 N | 14.8 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 PB6X20RLB
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 6 | Bore size in mm. |
| ×20 | 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 PB6X20RLB Is Used
PCB Probe Testing
Drives delicate test probes onto printed circuit boards with a safe 9 N working load, preventing trace damage while fitting into dense testing jigs.
Small Part Diverting
Extends a 3 mm rod to push lightweight plastic caps or electronic resistors between conveyor lanes without adding bulk to the transfer head.
Lab Sample Ejection
Ejects tiny vials from a centrifuge carousel using the 14.2 N extend force, where the SUS304 body withstands humid laboratory environments.
Is the Airtac PB Pen-type Cylinder PB6X20RLB the Right Cylinder?
When sizing this 6 mm bore unit, consider stepping down to the 4 mm bore if your payload is very light, which offers 6.3 N of push at 0.5 MPa. If you need more force, stepping up to the 10 mm bore provides 39.3 N of push at 0.5 MPa. For the PB6X20RLB, plan for a safe working load of roughly 9 N, which is about 60 percent of the theoretical 14.2 N force, to account for seal friction and smooth travel.
Keep in mind that a standard double-acting cylinder does not hold its position if air pressure is lost or the valve is centered; the piston will drift, and the bumper only decelerates it near the end of the stroke. For a fail-safe hold, an external stop or rod lock is required. Confirm your ordering essentials: 6 mm bore, 20 mm stroke, M5x0.8 port, no sensor magnet, R axial inlet, and LB mount.
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 PB6X20RLB FAQ
At 0.5 MPa, the push force is 14.2 N and the pull force is 10.6 N. At the maximum operating pressure of 0.7 MPa, the push is 19.8 N and the pull is 14.8 N. The operating pressure range is 0.15-0.7 MPa, with a speed of 50-800 mm/s and a proof pressure of 1.2 MPa.
It uses a fixed TPU bumper at each end that decelerates the piston over the last few millimeters, but it is not adjustable or a locking brake. If you are moving real tooling mass at higher speeds, you should meter-out the exhaust or add an external shock absorber. The piston will drift if air is lost, so an external rod lock is needed for fail-safe holding.
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