Airtac PB Pen-type Cylinder PB6X50RLB
The AirTAC Airtac PB Pen-type Cylinder PB6X50RLB is a double-acting pen-size (mini) air cylinder with a Ø6mm bore and 50mm 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
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM5×0.8
- CushionElastic bumper (both ends)
About the Airtac PB Pen-type Cylinder PB6X50RLB
The AirTAC PB6X50RLB is a JIS pen-size double-acting mini cylinder engineered for compact, high-frequency motion. It features a slim SUS304 stainless steel barrel and piston rod, offering excellent durability in damp or mildly corrosive environments while keeping weight low for end-of-arm tooling. With a 6mm bore and 50mm stroke, it generates 14.2 N of push force and 10.6 N of pull force at 0.5 MPa.
Air connects via an M5x0.8 port, and this specific configuration includes an R axial inlet for in-line plumbing alongside an LB mounting bracket for secure body attachment. The unit relies on a fixed TPU bumper at each end to decelerate the stroke over the final few millimeters. Because the piston rod is just 3mm thick, it is built for coaxial thrust and requires an external guide if subjected to off-axis loads.
Airtac PB Pen-type Cylinder PB6X50RLB Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB6X50RLB |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø6 mm |
| Rod diameter | Ø3 mm |
| Stroke | 50 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 PB6X50RLB
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 6 | Bore size in mm. |
| ×50 | 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 PB6X50RLB Is Used
PCB Pick-and-Place
Drives a small vacuum nozzle on a pick-and-place head to lift delicate electronic components, utilizing the lightweight SUS304 body to minimize robotic arm inertia.
Film Feed Deflection
Actuates a pivoting guide roller on a vertical form-fill-seal machine to tension and steer thin packaging film, relying on the LB bracket for a stable pivot mount.
Lab Dispenser Positioning
Moves a micro-valve tip over a multi-well plate in an automated liquid handling station, where the compact 6mm barrel fits neatly between dense reagent racks.
Is the Airtac PB Pen-type Cylinder PB6X50RLB the Right Cylinder?
When sizing this actuator, note that the 6mm bore provides 14.2 N push at 0.5 MPa. If you need less force, the 4mm bore offers 6.3 N; stepping up to the 10mm bore yields 39.3 N. Plan for a safe working load of roughly 9 N (about 60% of the 0.5 MPa theoretical force) to account for seal friction, which translates to lifting around 0.7 kg vertically with a 2:1 safety margin.
This model uses an R axial back cover and an LB mount, but it does not include a sensor magnet (no -S code). Keep in mind that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the bumper only decelerates near stroke end rather than locking the load. For fail-safe holding, an external rod lock or mechanical stop is required.
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 PB6X50RLB FAQ
At 0.5 MPa this 6mm bore cylinder provides 14.2 N push and 10.6 N pull. At the maximum operating pressure of 0.7 MPa, the force increases to 19.8 N push and 14.8 N pull. It operates at speeds between 50-800 mm/s, with a proof pressure of 1.2 MPa.
It uses a fixed TPU bumper at each end that absorbs impact over the last few millimeters of travel, but it is not field-adjustable. If moving real tooling mass at high speed, you should meter-out the exhaust or add an external shock absorber. The cylinder will not hold its position if air is lost; an external stop is needed for fail-safe holding.
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