Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S
The AirTAC Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S
The AirTAC SAUJ40X50-30S is a double-acting, single-rod profile cylinder with an on-site adjustable extend stroke. An external stop screw lets you shorten the 50 mm nominal stroke by up to 30 mm, yielding a usable extend range of 20-50 mm. It features a hard-anodized aluminum extruded barrel, making it more compact than an ISO 15552 cylinder of the same bore. The 1/4" port and M12x1.25 rod end thread are fixed by the 40 mm bore.
This magnetic (-S) model supports CMSG, DMSG, and EMSG switches for position sensing. At 0.5 MPa it delivers 628 N push and 528 N pull force. For sizing, the safe working load is roughly 377 N (about 60% of the 0.5 MPa push figure), and it can vertically lift around 32 kg with a 2:1 safety margin. The external stop sets the end position but does not lock the load; use an external rod lock for holding.
Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S Technical Specifications
| Model | Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Where the Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S Is Used
Adjustable Clamping Stops
Ideal for machining fixtures where the material thickness varies, letting operators dial in the exact 20-50 mm extend position via the stop screw.
Variable-Depth Locating Pins
Perfect for assembly stations that need on-site stroke tuning to seat parts at different depths without swapping out the entire actuator.
Dynamic Transfer Pushers
Suits diverter gates on conveyors handling mixed product sizes, allowing quick extend-stroke adjustments to accommodate varying package widths.
Is the Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S the Right Cylinder?
When sizing this 40 mm bore unit, the neighboring 32 mm bore offers 402 N push at 0.5 MPa, while the 50 mm bore provides 982 N if your application needs more force. Choose the SAUJ over a fixed-stroke SAU when you need field tuning of the extend position without buying a new cylinder. The 30 mm adjust window here is ideal for fine-tuning clamping or locating stops. Basic, FA, and LB mountings are available, and the -S suffix means a piston magnet is already included for sensors. For strokes at or above 300 mm, always use external guides to prevent side-loading damage.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X50-30S FAQ
This 40 mm bore cylinder delivers 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa. The 50 mm nominal extend stroke can be shortened by up to 30 mm on-site using the external stop screw, giving a usable range of 20-50 mm. It uses a 1/4" port.
The -S suffix indicates a built-in piston magnet ready for CMSG, DMSG, or EMSG switches. Note that the external stop screw only sets the end position; it is not a load lock. The cylinder will drift on air loss because the air cushion only decelerates the piston near the end of the stroke. For secure load holding, install an external rod lock or a pilot-operated check valve.
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