Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X950-30S
The AirTAC Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X950-30S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 950mm 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
- Stroke950 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 SAUJ40X950-30S
The AirTAC SAUJ40X950-30S is a double-acting, single-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site. The nominal 950 mm stroke is the maximum, yielding a usable extend window of 920-950 mm. It features a 1/4" port, an M12x1.25 rod thread, and 21 mm adjustable air cushions at both ends. The -S suffix means a piston magnet is built in for CMSG, DMSG, or EMSG position switches.
This 40 mm bore generates 628 N push and 528 N pull at 0.5 MPa, rising to 879 N push at 0.7 MPa. For sizing, the safe working load is roughly 377 N (60% of the 0.5 MPa push), and it can vertically lift about 32 kg with a 2:1 safety margin. The extruded aluminum profile is shorter than an ISO 15552 cylinder of the same bore, offering a compact footprint. It operates at 0.15-1.0 MPa and -20 to +70 C, with a Viton H seal option available for up to 150 C.
Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X950-30S Technical Specifications
| Model | Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X950-30S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 950 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 SAUJ40X950-30S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×950 | 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 SAUJ40X950-30S Is Used
Long-Reach Part Transfer
Moving components across a 920-950 mm gap where the exact stopping point at the end of the extend stroke must be dialed in by 30 mm to match a varying downstream conveyor.
Adjustable Length Push-Off
Ejecting cartons of different sizes from a belt, using the stop screw to shorten the extend stroke on-site and prevent the rod from over-traveling into the guard.
Vertical Material Lift
Raising a 32 kg payload with a 2:1 safety margin, using the external stop to set precise upper end positions for different rack shelf heights.
Is the Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X950-30S the Right Cylinder?
When sizing this unit, compare it against the neighboring 32 mm bore (402 N push @0.5 MPa) and 50 mm bore (982 N push @0.5 MPa) to ensure your force margin is correct. Choose the SAUJ adjustable version over a fixed SAU cylinder when your machine build requires final end-position tuning of up to 30 mm without buying new hardware. The 1/4" port and mounting options are compatible with the AirTAC SC series, supporting Basic, FA flange, and LB foot mounts. Because the -S magnet is present, you can directly mount CMSG/DMSG/EMSG sensors. For this long 950 mm stroke, you must use external guides to prevent rod bending and manage side loads. Remember the stop screw sets end position but does not lock the load; use an external rod lock or pilot-operated check valve to hold a load securely, as air cushions only decelerate.
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 SAUJ40X950-30S FAQ
This 40 mm bore cylinder has a 1/4" port and provides 628 N push / 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 nominal 950 mm extend stroke is the maximum; the external stop screw lets you shorten it by up to 30 mm on-site, giving a 920-950 mm usable window.
The -S suffix indicates a built-in piston magnet for direct mounting of CMSG, DMSG, or EMSG electronic or reed switches. The cylinder does not hold a load on air loss or when the valve is centered; the piston will drift and the 21 mm air cushions only decelerate near the end of travel. The stop screw sets the end position but is not a brake. For secure load holding, install an external rod lock or pilot-operated check valve.
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