Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X250-10S
The AirTAC Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X250-10S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 SAUJ40X250-10S
The AirTAC SAUJ40X250-10S is a double-acting, single-rod profile cylinder with an on-site stroke adjustment window. An external stop screw lets you trim the extend stroke by up to 10 mm, giving a usable working range of 240-250 mm without buying a new actuator. The extruded aluminum barrel makes it shorter than an ISO 15552 cylinder of the same bore. It features a 1/4" port, an M12x1.25 rod thread, and adjustable air cushions.
This 40 mm bore generates 628 N push and 528 N pull at 0.5 MPa, peaking at 1130 N push at 0.9 MPa. A practical computed insight: the safe working load is roughly 377 N (about 60% of the 0.5 MPa push force), translating to a vertical lift capacity of about 32 kg with a 2:1 safety margin. The -S suffix means a built-in magnet is present for CMSG, DMSG, or EMSG sensors.
Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X250-10S Technical Specifications
| Model | Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X250-10S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAUJ40X250-10S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SAUJ40X250-10S Is Used
Precision Pressing
Dialing in exact contact pressure on small bearings where a 10 mm extend stroke trim prevents over-travel and workpiece damage.
Sorter Diverter
Adjusting the extend stop on-site to match varying package widths on a packaging line without swapping out the actuator.
Pallet Stop Gate
Fine-tuning the gate extension height to accommodate different pallet footprints while using sensors to confirm gate position.
Is the Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X250-10S the Right Cylinder?
Size this 40 mm bore against its neighbors: the 32 mm yields 402 N push while the 50 mm offers 982 N at 0.5 MPa. Choose the SAUJ over a fixed SAU when you need final end-position tuning during machine commissioning. The 10 mm adjust window is ideal for fine-tuning clamping or pressing depth. Mounting options include Basic, FA flange, and LB foot, compatible with the AirTAC SC series. For strokes of 250 mm or longer, use an external guide to prevent side-load wear. If you need position feedback, this -S model supports CMSG/DMSG/EMSG switches.
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 SAUJ40X250-10S 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, and 1130 N at 0.9 MPa, with a theoretical max of 128 kgf at 1.0 MPa. The nominal 250 mm extend stroke can be shortened by up to 10 mm on-site via the external stop screw, yielding a 240-250 mm usable range.
The -S suffix indicates a built-in piston magnet for mounting CMSG, DMSG, or EMSG electronic or reed switches. Note that the stop screw only sets the end position; it is not a load lock. The air cushions merely decelerate the piston. Because the cylinder will drift on air loss, use an external rod lock or pilot-operated check valve for secure load holding.
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